/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 02:18:37,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 02:18:37,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 02:18:37,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 02:18:37,335 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-04-15 02:18:37,376 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 02:18:37,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 02:18:37,378 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 02:18:37,378 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 02:18:37,381 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 02:18:37,382 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 02:18:37,382 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 02:18:37,382 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 02:18:37,383 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 02:18:37,383 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 02:18:37,384 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 02:18:37,384 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 02:18:37,384 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 02:18:37,384 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 02:18:37,385 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 02:18:37,385 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 02:18:37,385 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 02:18:37,385 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 02:18:37,385 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 02:18:37,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 02:18:37,386 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 02:18:37,386 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 02:18:37,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 02:18:37,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 02:18:37,386 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 02:18:37,386 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 02:18:37,387 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 02:18:37,387 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 02:18:37,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 02:18:37,387 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 02:18:37,387 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 02:18:37,387 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 02:18:37,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 02:18:37,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 02:18:37,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 02:18:37,823 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 02:18:37,824 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 02:18:37,826 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-2.wvr.bpl [2021-04-15 02:18:37,826 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-2.wvr.bpl' [2021-04-15 02:18:37,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 02:18:37,868 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 02:18:37,869 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 02:18:37,870 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 02:18:37,870 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 02:18:37,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:18:37" (1/1) ... [2021-04-15 02:18:37,895 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:18:37" (1/1) ... [2021-04-15 02:18:37,904 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 02:18:37,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 02:18:37,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 02:18:37,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 02:18:37,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:18:37" (1/1) ... [2021-04-15 02:18:37,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:18:37" (1/1) ... [2021-04-15 02:18:37,914 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:18:37" (1/1) ... [2021-04-15 02:18:37,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:18:37" (1/1) ... [2021-04-15 02:18:37,916 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:18:37" (1/1) ... [2021-04-15 02:18:37,918 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:18:37" (1/1) ... [2021-04-15 02:18:37,919 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:18:37" (1/1) ... [2021-04-15 02:18:37,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 02:18:37,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 02:18:37,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 02:18:37,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 02:18:37,925 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:18:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 02:18:37,989 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 02:18:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 02:18:37,990 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 02:18:37,990 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 02:18:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 02:18:37,990 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 02:18:37,991 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 02:18:37,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 02:18:37,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 02:18:37,992 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 02:18:38,299 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 02:18:38,300 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-04-15 02:18:38,300 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-04-15 02:18:38,300 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-04-15 02:18:38,301 INFO L202 PluginConnector]: Adding new model unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 02:18:38 BoogieIcfgContainer [2021-04-15 02:18:38,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 02:18:38,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 02:18:38,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 02:18:38,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 02:18:38,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:18:37" (1/2) ... [2021-04-15 02:18:38,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b13f81f and model type unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 02:18:38, skipping insertion in model container [2021-04-15 02:18:38,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 02:18:38" (2/2) ... [2021-04-15 02:18:38,307 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.bpl [2021-04-15 02:18:38,311 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 02:18:38,311 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 02:18:38,331 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 02:18:38,332 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 02:18:38,370 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-04-15 02:18:38,385 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-04-15 02:18:38,410 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 02:18:38,410 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 02:18:38,410 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 02:18:38,410 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 02:18:38,410 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 02:18:38,411 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 02:18:38,411 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 02:18:38,411 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 02:18:38,422 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-04-15 02:18:38,431 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:38,433 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:38,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-04-15 02:18:38,438 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:38,438 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:38,438 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:38,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:38,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1694861722, now seen corresponding path program 1 times [2021-04-15 02:18:38,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:38,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788280252] [2021-04-15 02:18:38,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:38,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:38,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788280252] [2021-04-15 02:18:38,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:38,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-04-15 02:18:38,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172650686] [2021-04-15 02:18:38,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 02:18:38,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:38,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 02:18:38,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 02:18:38,600 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:38,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:38,618 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-04-15 02:18:38,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 02:18:38,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-04-15 02:18:38,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:38,626 INFO L225 Difference]: With dead ends: 22 [2021-04-15 02:18:38,626 INFO L226 Difference]: Without dead ends: 19 [2021-04-15 02:18:38,627 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 02:18:38,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-04-15 02:18:38,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-04-15 02:18:38,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:38,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-04-15 02:18:38,652 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-04-15 02:18:38,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:38,652 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-04-15 02:18:38,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:38,653 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-04-15 02:18:38,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-04-15 02:18:38,653 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:38,653 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:38,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 02:18:38,654 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:38,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:38,654 INFO L82 PathProgramCache]: Analyzing trace with hash 658584646, now seen corresponding path program 1 times [2021-04-15 02:18:38,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:38,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783050536] [2021-04-15 02:18:38,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:38,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:38,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783050536] [2021-04-15 02:18:38,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990880750] [2021-04-15 02:18:38,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:38,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:38,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-04-15 02:18:38,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:38,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:38,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:38,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-04-15 02:18:38,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780158465] [2021-04-15 02:18:38,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 02:18:38,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:38,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 02:18:38,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:18:38,814 INFO L87 Difference]: Start difference. First operand 19 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:38,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:38,854 INFO L93 Difference]: Finished difference Result 28 states and 45 transitions. [2021-04-15 02:18:38,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 02:18:38,854 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-04-15 02:18:38,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:38,855 INFO L225 Difference]: With dead ends: 28 [2021-04-15 02:18:38,855 INFO L226 Difference]: Without dead ends: 28 [2021-04-15 02:18:38,856 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-04-15 02:18:38,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-04-15 02:18:38,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-04-15 02:18:38,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:38,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 35 transitions. [2021-04-15 02:18:38,861 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 35 transitions. Word has length 10 [2021-04-15 02:18:38,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:38,861 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 35 transitions. [2021-04-15 02:18:38,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:38,862 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 35 transitions. [2021-04-15 02:18:38,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-04-15 02:18:38,862 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:38,862 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:39,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-04-15 02:18:39,082 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:39,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:39,082 INFO L82 PathProgramCache]: Analyzing trace with hash -978034129, now seen corresponding path program 1 times [2021-04-15 02:18:39,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:39,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704997047] [2021-04-15 02:18:39,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:39,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:39,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704997047] [2021-04-15 02:18:39,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:39,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 02:18:39,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085963574] [2021-04-15 02:18:39,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 02:18:39,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:39,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 02:18:39,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:18:39,156 INFO L87 Difference]: Start difference. First operand 19 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:39,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:39,216 INFO L93 Difference]: Finished difference Result 22 states and 36 transitions. [2021-04-15 02:18:39,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:18:39,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-04-15 02:18:39,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:39,217 INFO L225 Difference]: With dead ends: 22 [2021-04-15 02:18:39,217 INFO L226 Difference]: Without dead ends: 18 [2021-04-15 02:18:39,217 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:18:39,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-04-15 02:18:39,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-04-15 02:18:39,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:39,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-04-15 02:18:39,221 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-04-15 02:18:39,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:39,221 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-04-15 02:18:39,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:39,221 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-04-15 02:18:39,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-04-15 02:18:39,222 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:39,222 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:39,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-15 02:18:39,222 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:39,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:39,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1576587559, now seen corresponding path program 2 times [2021-04-15 02:18:39,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:39,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085818331] [2021-04-15 02:18:39,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:39,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085818331] [2021-04-15 02:18:39,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:39,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 02:18:39,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259072179] [2021-04-15 02:18:39,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 02:18:39,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:39,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 02:18:39,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:18:39,312 INFO L87 Difference]: Start difference. First operand 18 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:39,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:39,334 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-04-15 02:18:39,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 02:18:39,335 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-04-15 02:18:39,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:39,336 INFO L225 Difference]: With dead ends: 20 [2021-04-15 02:18:39,336 INFO L226 Difference]: Without dead ends: 20 [2021-04-15 02:18:39,336 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:18:39,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-04-15 02:18:39,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-04-15 02:18:39,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:39,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-04-15 02:18:39,340 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-04-15 02:18:39,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:39,341 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-04-15 02:18:39,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:39,341 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-04-15 02:18:39,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-04-15 02:18:39,342 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:39,342 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:39,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-15 02:18:39,342 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:39,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:39,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1035640753, now seen corresponding path program 1 times [2021-04-15 02:18:39,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:39,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509926803] [2021-04-15 02:18:39,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:39,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:18:39,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509926803] [2021-04-15 02:18:39,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85472054] [2021-04-15 02:18:39,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:39,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:39,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 02:18:39,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:39,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:18:39,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:39,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-04-15 02:18:39,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022258371] [2021-04-15 02:18:39,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 02:18:39,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:39,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 02:18:39,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:18:39,489 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:39,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:39,514 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-04-15 02:18:39,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 02:18:39,515 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-04-15 02:18:39,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:39,516 INFO L225 Difference]: With dead ends: 24 [2021-04-15 02:18:39,516 INFO L226 Difference]: Without dead ends: 24 [2021-04-15 02:18:39,517 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:18:39,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-04-15 02:18:39,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-04-15 02:18:39,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:39,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-04-15 02:18:39,521 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-04-15 02:18:39,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:39,521 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-04-15 02:18:39,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:39,522 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-04-15 02:18:39,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-15 02:18:39,522 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:39,522 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:39,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:39,739 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:39,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:39,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1473521199, now seen corresponding path program 2 times [2021-04-15 02:18:39,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:39,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341964783] [2021-04-15 02:18:39,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:39,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:39,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:39,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341964783] [2021-04-15 02:18:39,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544982267] [2021-04-15 02:18:39,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:39,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:18:39,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:39,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:18:39,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:39,983 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:18:39,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-04-15 02:18:39,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:18:39,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:18:39,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:18:39,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-04-15 02:18:40,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:40,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:40,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-04-15 02:18:40,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417921340] [2021-04-15 02:18:40,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:18:40,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:40,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:18:40,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:40,005 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:40,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:40,064 INFO L93 Difference]: Finished difference Result 54 states and 96 transitions. [2021-04-15 02:18:40,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:18:40,065 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-04-15 02:18:40,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:40,066 INFO L225 Difference]: With dead ends: 54 [2021-04-15 02:18:40,066 INFO L226 Difference]: Without dead ends: 51 [2021-04-15 02:18:40,066 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:40,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-04-15 02:18:40,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2021-04-15 02:18:40,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.121212121212121) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:40,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2021-04-15 02:18:40,073 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 12 [2021-04-15 02:18:40,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:40,073 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2021-04-15 02:18:40,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:40,074 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2021-04-15 02:18:40,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-15 02:18:40,074 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:40,074 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:40,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:40,285 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:40,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:40,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1077921553, now seen corresponding path program 3 times [2021-04-15 02:18:40,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:40,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132802232] [2021-04-15 02:18:40,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:40,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:18:40,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132802232] [2021-04-15 02:18:40,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578611340] [2021-04-15 02:18:40,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:40,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 02:18:40,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:40,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:18:40,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:40,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:18:40,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-04-15 02:18:40,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:18:40,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:18:40,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:18:40,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-04-15 02:18:40,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:40,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:40,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-04-15 02:18:40,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478198535] [2021-04-15 02:18:40,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:18:40,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:40,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:18:40,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:40,452 INFO L87 Difference]: Start difference. First operand 34 states and 70 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:40,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:40,482 INFO L93 Difference]: Finished difference Result 61 states and 117 transitions. [2021-04-15 02:18:40,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:18:40,482 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-04-15 02:18:40,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:40,483 INFO L225 Difference]: With dead ends: 61 [2021-04-15 02:18:40,483 INFO L226 Difference]: Without dead ends: 58 [2021-04-15 02:18:40,484 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:40,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-04-15 02:18:40,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2021-04-15 02:18:40,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:40,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 87 transitions. [2021-04-15 02:18:40,490 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 87 transitions. Word has length 12 [2021-04-15 02:18:40,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:40,491 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 87 transitions. [2021-04-15 02:18:40,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:40,492 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 87 transitions. [2021-04-15 02:18:40,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-15 02:18:40,493 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:40,493 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:40,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:40,703 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:40,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:40,703 INFO L82 PathProgramCache]: Analyzing trace with hash -452129241, now seen corresponding path program 4 times [2021-04-15 02:18:40,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:40,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401529747] [2021-04-15 02:18:40,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:40,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:40,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:18:40,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401529747] [2021-04-15 02:18:40,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126079593] [2021-04-15 02:18:40,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:40,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:18:40,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:40,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:18:40,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:40,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:18:40,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-04-15 02:18:40,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:18:40,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:18:40,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:18:40,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-04-15 02:18:40,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:40,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:40,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-04-15 02:18:40,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082487263] [2021-04-15 02:18:40,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:18:40,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:40,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:18:40,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:40,823 INFO L87 Difference]: Start difference. First operand 39 states and 87 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:40,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:40,859 INFO L93 Difference]: Finished difference Result 68 states and 138 transitions. [2021-04-15 02:18:40,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:18:40,860 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-04-15 02:18:40,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:40,861 INFO L225 Difference]: With dead ends: 68 [2021-04-15 02:18:40,861 INFO L226 Difference]: Without dead ends: 65 [2021-04-15 02:18:40,862 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:40,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-04-15 02:18:40,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2021-04-15 02:18:40,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.4) internal successors, (108), 45 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:40,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 108 transitions. [2021-04-15 02:18:40,868 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 108 transitions. Word has length 12 [2021-04-15 02:18:40,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:40,869 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 108 transitions. [2021-04-15 02:18:40,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:40,869 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 108 transitions. [2021-04-15 02:18:40,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:18:40,870 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:40,870 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:41,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:41,094 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:41,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:41,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1948130383, now seen corresponding path program 5 times [2021-04-15 02:18:41,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:41,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870604401] [2021-04-15 02:18:41,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:41,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:41,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870604401] [2021-04-15 02:18:41,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775710965] [2021-04-15 02:18:41,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:41,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:18:41,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:41,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 02:18:41,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:41,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:41,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:41,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-04-15 02:18:41,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466504856] [2021-04-15 02:18:41,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:18:41,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:41,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:18:41,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:41,257 INFO L87 Difference]: Start difference. First operand 46 states and 108 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:41,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:41,339 INFO L93 Difference]: Finished difference Result 90 states and 168 transitions. [2021-04-15 02:18:41,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:18:41,340 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:18:41,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:41,343 INFO L225 Difference]: With dead ends: 90 [2021-04-15 02:18:41,343 INFO L226 Difference]: Without dead ends: 90 [2021-04-15 02:18:41,343 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:18:41,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-04-15 02:18:41,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 46. [2021-04-15 02:18:41,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.4444444444444446) internal successors, (110), 45 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:41,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 110 transitions. [2021-04-15 02:18:41,363 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 110 transitions. Word has length 13 [2021-04-15 02:18:41,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:41,363 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 110 transitions. [2021-04-15 02:18:41,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:41,363 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 110 transitions. [2021-04-15 02:18:41,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:18:41,364 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:41,364 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:41,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:41,591 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:41,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:41,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1542411386, now seen corresponding path program 6 times [2021-04-15 02:18:41,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:41,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158472350] [2021-04-15 02:18:41,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:41,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158472350] [2021-04-15 02:18:41,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089956839] [2021-04-15 02:18:41,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:41,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-04-15 02:18:41,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:41,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 02:18:41,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:41,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:41,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:41,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-04-15 02:18:41,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425543558] [2021-04-15 02:18:41,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:18:41,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:41,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:18:41,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:41,728 INFO L87 Difference]: Start difference. First operand 46 states and 110 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:41,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:41,828 INFO L93 Difference]: Finished difference Result 87 states and 172 transitions. [2021-04-15 02:18:41,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:18:41,829 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:18:41,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:41,830 INFO L225 Difference]: With dead ends: 87 [2021-04-15 02:18:41,830 INFO L226 Difference]: Without dead ends: 82 [2021-04-15 02:18:41,831 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:18:41,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-04-15 02:18:41,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 56. [2021-04-15 02:18:41,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.418181818181818) internal successors, (133), 55 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:41,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 133 transitions. [2021-04-15 02:18:41,842 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 133 transitions. Word has length 13 [2021-04-15 02:18:41,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:41,842 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 133 transitions. [2021-04-15 02:18:41,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:41,843 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 133 transitions. [2021-04-15 02:18:41,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:18:41,843 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:41,843 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:42,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-04-15 02:18:42,057 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:42,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:42,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1142142321, now seen corresponding path program 7 times [2021-04-15 02:18:42,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:42,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480693318] [2021-04-15 02:18:42,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:42,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:42,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480693318] [2021-04-15 02:18:42,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476502939] [2021-04-15 02:18:42,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:42,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:42,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 02:18:42,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:42,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:42,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-04-15 02:18:42,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900074487] [2021-04-15 02:18:42,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:18:42,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:42,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:18:42,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:18:42,205 INFO L87 Difference]: Start difference. First operand 56 states and 133 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:42,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:42,268 INFO L93 Difference]: Finished difference Result 71 states and 152 transitions. [2021-04-15 02:18:42,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:18:42,268 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:18:42,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:42,269 INFO L225 Difference]: With dead ends: 71 [2021-04-15 02:18:42,269 INFO L226 Difference]: Without dead ends: 70 [2021-04-15 02:18:42,269 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:18:42,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-04-15 02:18:42,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 57. [2021-04-15 02:18:42,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.375) internal successors, (133), 56 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:42,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 133 transitions. [2021-04-15 02:18:42,274 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 133 transitions. Word has length 13 [2021-04-15 02:18:42,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:42,274 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 133 transitions. [2021-04-15 02:18:42,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:42,274 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 133 transitions. [2021-04-15 02:18:42,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:18:42,275 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:42,275 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:42,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-04-15 02:18:42,498 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:42,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:42,499 INFO L82 PathProgramCache]: Analyzing trace with hash 2059198674, now seen corresponding path program 8 times [2021-04-15 02:18:42,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:42,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644633930] [2021-04-15 02:18:42,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:42,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644633930] [2021-04-15 02:18:42,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701744989] [2021-04-15 02:18:42,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:42,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:18:42,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:42,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 02:18:42,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:42,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:42,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:42,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-04-15 02:18:42,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840683110] [2021-04-15 02:18:42,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:18:42,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:42,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:18:42,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:18:42,621 INFO L87 Difference]: Start difference. First operand 57 states and 133 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:42,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:42,663 INFO L93 Difference]: Finished difference Result 88 states and 173 transitions. [2021-04-15 02:18:42,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:18:42,664 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:18:42,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:42,665 INFO L225 Difference]: With dead ends: 88 [2021-04-15 02:18:42,665 INFO L226 Difference]: Without dead ends: 88 [2021-04-15 02:18:42,665 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:42,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-04-15 02:18:42,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 57. [2021-04-15 02:18:42,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.375) internal successors, (133), 56 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:42,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 133 transitions. [2021-04-15 02:18:42,677 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 133 transitions. Word has length 13 [2021-04-15 02:18:42,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:42,677 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 133 transitions. [2021-04-15 02:18:42,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:42,678 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 133 transitions. [2021-04-15 02:18:42,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:18:42,682 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:42,682 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:42,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:42,898 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:42,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:42,899 INFO L82 PathProgramCache]: Analyzing trace with hash 22479943, now seen corresponding path program 9 times [2021-04-15 02:18:42,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:42,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623815442] [2021-04-15 02:18:42,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:42,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:42,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:42,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623815442] [2021-04-15 02:18:42,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994117513] [2021-04-15 02:18:42,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:42,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:18:42,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:42,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 02:18:42,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:18:43,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:43,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-04-15 02:18:43,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360375283] [2021-04-15 02:18:43,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:18:43,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:43,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:18:43,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:18:43,039 INFO L87 Difference]: Start difference. First operand 57 states and 133 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:43,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:43,073 INFO L93 Difference]: Finished difference Result 97 states and 193 transitions. [2021-04-15 02:18:43,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 02:18:43,073 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:18:43,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:43,075 INFO L225 Difference]: With dead ends: 97 [2021-04-15 02:18:43,075 INFO L226 Difference]: Without dead ends: 97 [2021-04-15 02:18:43,075 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:43,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-04-15 02:18:43,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 60. [2021-04-15 02:18:43,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.4237288135593222) internal successors, (143), 59 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:43,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 143 transitions. [2021-04-15 02:18:43,085 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 143 transitions. Word has length 13 [2021-04-15 02:18:43,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:43,085 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 143 transitions. [2021-04-15 02:18:43,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:43,085 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 143 transitions. [2021-04-15 02:18:43,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:18:43,086 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:43,086 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:43,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:43,301 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:43,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:43,301 INFO L82 PathProgramCache]: Analyzing trace with hash 967241926, now seen corresponding path program 10 times [2021-04-15 02:18:43,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:43,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241827010] [2021-04-15 02:18:43,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:43,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:43,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:43,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241827010] [2021-04-15 02:18:43,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010698966] [2021-04-15 02:18:43,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:18:43,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:18:43,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:43,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 02:18:43,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:43,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:18:43,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:43,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-04-15 02:18:43,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309403782] [2021-04-15 02:18:43,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:18:43,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:43,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:18:43,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:18:43,405 INFO L87 Difference]: Start difference. First operand 60 states and 143 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:43,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:43,467 INFO L93 Difference]: Finished difference Result 99 states and 200 transitions. [2021-04-15 02:18:43,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:18:43,467 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:18:43,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:43,469 INFO L225 Difference]: With dead ends: 99 [2021-04-15 02:18:43,469 INFO L226 Difference]: Without dead ends: 97 [2021-04-15 02:18:43,469 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:18:43,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-04-15 02:18:43,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 64. [2021-04-15 02:18:43,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.492063492063492) internal successors, (157), 63 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:43,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2021-04-15 02:18:43,477 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 13 [2021-04-15 02:18:43,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:43,477 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2021-04-15 02:18:43,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:43,477 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2021-04-15 02:18:43,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:18:43,479 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:43,479 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:43,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-04-15 02:18:43,693 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:43,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:43,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1767934633, now seen corresponding path program 11 times [2021-04-15 02:18:43,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:43,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859954489] [2021-04-15 02:18:43,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:43,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:43,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859954489] [2021-04-15 02:18:43,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518899337] [2021-04-15 02:18:43,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:43,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:18:43,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:43,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 02:18:43,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:43,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:43,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:43,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-04-15 02:18:43,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863388216] [2021-04-15 02:18:43,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:18:43,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:43,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:18:43,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:18:43,799 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:43,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:43,856 INFO L93 Difference]: Finished difference Result 101 states and 205 transitions. [2021-04-15 02:18:43,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:18:43,857 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:18:43,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:43,858 INFO L225 Difference]: With dead ends: 101 [2021-04-15 02:18:43,858 INFO L226 Difference]: Without dead ends: 100 [2021-04-15 02:18:43,858 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:18:43,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-04-15 02:18:43,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2021-04-15 02:18:43,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.4761904761904763) internal successors, (156), 63 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:43,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 156 transitions. [2021-04-15 02:18:43,862 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 156 transitions. Word has length 13 [2021-04-15 02:18:43,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:43,862 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 156 transitions. [2021-04-15 02:18:43,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:43,862 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 156 transitions. [2021-04-15 02:18:43,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:18:43,862 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:43,862 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:44,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-04-15 02:18:44,077 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:44,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:44,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1609976310, now seen corresponding path program 12 times [2021-04-15 02:18:44,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:44,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999595616] [2021-04-15 02:18:44,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:44,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999595616] [2021-04-15 02:18:44,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2673948] [2021-04-15 02:18:44,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:44,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:18:44,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:44,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 02:18:44,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:44,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:44,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:44,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-04-15 02:18:44,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406976642] [2021-04-15 02:18:44,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:18:44,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:44,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:18:44,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:18:44,182 INFO L87 Difference]: Start difference. First operand 64 states and 156 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:44,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:44,223 INFO L93 Difference]: Finished difference Result 98 states and 199 transitions. [2021-04-15 02:18:44,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:18:44,223 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:18:44,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:44,224 INFO L225 Difference]: With dead ends: 98 [2021-04-15 02:18:44,224 INFO L226 Difference]: Without dead ends: 98 [2021-04-15 02:18:44,225 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:44,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-04-15 02:18:44,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2021-04-15 02:18:44,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.4761904761904763) internal successors, (156), 63 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:44,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 156 transitions. [2021-04-15 02:18:44,228 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 156 transitions. Word has length 13 [2021-04-15 02:18:44,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:44,229 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 156 transitions. [2021-04-15 02:18:44,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:44,229 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 156 transitions. [2021-04-15 02:18:44,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:18:44,229 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:44,229 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:44,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-04-15 02:18:44,437 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:44,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:44,437 INFO L82 PathProgramCache]: Analyzing trace with hash -816419355, now seen corresponding path program 13 times [2021-04-15 02:18:44,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:44,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553912536] [2021-04-15 02:18:44,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:44,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:44,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:44,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553912536] [2021-04-15 02:18:44,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774928409] [2021-04-15 02:18:44,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:18:44,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:44,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 02:18:44,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:44,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:44,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-04-15 02:18:44,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811148054] [2021-04-15 02:18:44,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:18:44,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:44,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:18:44,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:44,593 INFO L87 Difference]: Start difference. First operand 64 states and 156 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:44,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:44,669 INFO L93 Difference]: Finished difference Result 94 states and 196 transitions. [2021-04-15 02:18:44,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:18:44,669 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:18:44,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:44,670 INFO L225 Difference]: With dead ends: 94 [2021-04-15 02:18:44,670 INFO L226 Difference]: Without dead ends: 92 [2021-04-15 02:18:44,671 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:18:44,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-04-15 02:18:44,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2021-04-15 02:18:44,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.453125) internal successors, (157), 64 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:44,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2021-04-15 02:18:44,677 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 13 [2021-04-15 02:18:44,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:44,677 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2021-04-15 02:18:44,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:44,677 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2021-04-15 02:18:44,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:18:44,677 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:44,677 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:44,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:44,893 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:44,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:44,893 INFO L82 PathProgramCache]: Analyzing trace with hash 955943652, now seen corresponding path program 14 times [2021-04-15 02:18:44,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:44,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071442805] [2021-04-15 02:18:44,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:44,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071442805] [2021-04-15 02:18:44,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93067036] [2021-04-15 02:18:44,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:18:44,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:18:44,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:44,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:44,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:45,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:45,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:45,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-04-15 02:18:45,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780264401] [2021-04-15 02:18:45,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:18:45,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:45,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:18:45,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:45,002 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:45,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:45,073 INFO L93 Difference]: Finished difference Result 101 states and 203 transitions. [2021-04-15 02:18:45,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:18:45,073 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:18:45,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:45,074 INFO L225 Difference]: With dead ends: 101 [2021-04-15 02:18:45,074 INFO L226 Difference]: Without dead ends: 101 [2021-04-15 02:18:45,074 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:18:45,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-04-15 02:18:45,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 65. [2021-04-15 02:18:45,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.453125) internal successors, (157), 64 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:45,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2021-04-15 02:18:45,079 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 13 [2021-04-15 02:18:45,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:45,079 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2021-04-15 02:18:45,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:45,079 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2021-04-15 02:18:45,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:18:45,080 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:45,080 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:45,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-04-15 02:18:45,293 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:45,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:45,293 INFO L82 PathProgramCache]: Analyzing trace with hash -2052794865, now seen corresponding path program 15 times [2021-04-15 02:18:45,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:45,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266054524] [2021-04-15 02:18:45,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:45,328 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:45,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266054524] [2021-04-15 02:18:45,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20846083] [2021-04-15 02:18:45,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:45,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:18:45,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:45,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 02:18:45,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:45,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:45,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:45,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-04-15 02:18:45,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405157097] [2021-04-15 02:18:45,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:18:45,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:45,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:18:45,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:45,389 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:45,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:45,426 INFO L93 Difference]: Finished difference Result 118 states and 240 transitions. [2021-04-15 02:18:45,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:18:45,427 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:18:45,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:45,427 INFO L225 Difference]: With dead ends: 118 [2021-04-15 02:18:45,428 INFO L226 Difference]: Without dead ends: 118 [2021-04-15 02:18:45,428 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:18:45,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-04-15 02:18:45,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 69. [2021-04-15 02:18:45,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.5294117647058822) internal successors, (172), 68 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:45,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 172 transitions. [2021-04-15 02:18:45,431 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 172 transitions. Word has length 13 [2021-04-15 02:18:45,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:45,431 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 172 transitions. [2021-04-15 02:18:45,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:45,431 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 172 transitions. [2021-04-15 02:18:45,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:18:45,432 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:45,432 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:45,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:45,656 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:45,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:45,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1108032882, now seen corresponding path program 16 times [2021-04-15 02:18:45,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:45,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012506908] [2021-04-15 02:18:45,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:45,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:45,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:45,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012506908] [2021-04-15 02:18:45,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186033243] [2021-04-15 02:18:45,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:45,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:18:45,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:45,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 02:18:45,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:45,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:45,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-04-15 02:18:45,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890278104] [2021-04-15 02:18:45,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:18:45,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:45,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:18:45,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:45,762 INFO L87 Difference]: Start difference. First operand 69 states and 172 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:45,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:45,845 INFO L93 Difference]: Finished difference Result 109 states and 231 transitions. [2021-04-15 02:18:45,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:18:45,845 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:18:45,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:45,846 INFO L225 Difference]: With dead ends: 109 [2021-04-15 02:18:45,846 INFO L226 Difference]: Without dead ends: 107 [2021-04-15 02:18:45,846 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:18:45,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-04-15 02:18:45,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2021-04-15 02:18:45,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.5945945945945947) internal successors, (192), 74 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:45,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 192 transitions. [2021-04-15 02:18:45,850 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 192 transitions. Word has length 13 [2021-04-15 02:18:45,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:45,850 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 192 transitions. [2021-04-15 02:18:45,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:45,850 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 192 transitions. [2021-04-15 02:18:45,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:18:45,850 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:45,850 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:46,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:46,065 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:46,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:46,065 INFO L82 PathProgramCache]: Analyzing trace with hash -307340175, now seen corresponding path program 17 times [2021-04-15 02:18:46,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:46,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001984294] [2021-04-15 02:18:46,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:46,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:46,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:46,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001984294] [2021-04-15 02:18:46,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993141999] [2021-04-15 02:18:46,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:46,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:18:46,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:46,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 02:18:46,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:46,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:18:46,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:46,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-04-15 02:18:46,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686035643] [2021-04-15 02:18:46,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:18:46,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:46,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:18:46,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:46,196 INFO L87 Difference]: Start difference. First operand 75 states and 192 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:46,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:46,266 INFO L93 Difference]: Finished difference Result 114 states and 244 transitions. [2021-04-15 02:18:46,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:18:46,267 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:18:46,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:46,268 INFO L225 Difference]: With dead ends: 114 [2021-04-15 02:18:46,268 INFO L226 Difference]: Without dead ends: 113 [2021-04-15 02:18:46,268 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:18:46,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-04-15 02:18:46,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 75. [2021-04-15 02:18:46,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.581081081081081) internal successors, (191), 74 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:46,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 191 transitions. [2021-04-15 02:18:46,272 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 191 transitions. Word has length 13 [2021-04-15 02:18:46,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:46,272 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 191 transitions. [2021-04-15 02:18:46,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:46,273 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 191 transitions. [2021-04-15 02:18:46,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:18:46,276 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:46,276 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:46,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-04-15 02:18:46,493 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:46,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:46,493 INFO L82 PathProgramCache]: Analyzing trace with hash 609716178, now seen corresponding path program 18 times [2021-04-15 02:18:46,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:46,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827001309] [2021-04-15 02:18:46,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:46,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:46,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827001309] [2021-04-15 02:18:46,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019087106] [2021-04-15 02:18:46,537 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:46,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:18:46,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:46,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 02:18:46,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:46,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:18:46,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:46,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-04-15 02:18:46,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845785561] [2021-04-15 02:18:46,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:18:46,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:46,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:18:46,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:46,599 INFO L87 Difference]: Start difference. First operand 75 states and 191 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:46,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:46,662 INFO L93 Difference]: Finished difference Result 102 states and 223 transitions. [2021-04-15 02:18:46,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:18:46,663 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:18:46,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:46,663 INFO L225 Difference]: With dead ends: 102 [2021-04-15 02:18:46,663 INFO L226 Difference]: Without dead ends: 102 [2021-04-15 02:18:46,664 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:18:46,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-04-15 02:18:46,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 74. [2021-04-15 02:18:46,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5342465753424657) internal successors, (185), 73 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:46,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2021-04-15 02:18:46,666 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 13 [2021-04-15 02:18:46,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:46,666 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2021-04-15 02:18:46,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:46,667 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2021-04-15 02:18:46,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:18:46,667 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:46,667 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:46,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:46,885 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:46,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:46,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1403273133, now seen corresponding path program 19 times [2021-04-15 02:18:46,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:46,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516071792] [2021-04-15 02:18:46,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:46,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:46,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:46,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516071792] [2021-04-15 02:18:46,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033608767] [2021-04-15 02:18:46,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:46,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:46,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 02:18:46,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:46,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:46,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-04-15 02:18:46,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440262550] [2021-04-15 02:18:46,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:18:46,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:46,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:18:46,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:18:46,999 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:47,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:47,078 INFO L93 Difference]: Finished difference Result 118 states and 244 transitions. [2021-04-15 02:18:47,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:18:47,078 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:18:47,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:47,079 INFO L225 Difference]: With dead ends: 118 [2021-04-15 02:18:47,079 INFO L226 Difference]: Without dead ends: 116 [2021-04-15 02:18:47,080 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:18:47,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-04-15 02:18:47,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 74. [2021-04-15 02:18:47,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5205479452054793) internal successors, (184), 73 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:47,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 184 transitions. [2021-04-15 02:18:47,084 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 184 transitions. Word has length 13 [2021-04-15 02:18:47,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:47,084 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 184 transitions. [2021-04-15 02:18:47,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:47,084 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 184 transitions. [2021-04-15 02:18:47,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:18:47,085 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:47,085 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:47,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-04-15 02:18:47,303 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:47,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:47,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1119331156, now seen corresponding path program 20 times [2021-04-15 02:18:47,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:47,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518734108] [2021-04-15 02:18:47,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:47,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:47,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518734108] [2021-04-15 02:18:47,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674558850] [2021-04-15 02:18:47,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:47,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:18:47,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:47,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 02:18:47,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:47,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:47,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-04-15 02:18:47,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48941676] [2021-04-15 02:18:47,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:18:47,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:47,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:18:47,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:18:47,429 INFO L87 Difference]: Start difference. First operand 74 states and 184 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:47,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:47,513 INFO L93 Difference]: Finished difference Result 103 states and 223 transitions. [2021-04-15 02:18:47,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:18:47,514 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:18:47,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:47,514 INFO L225 Difference]: With dead ends: 103 [2021-04-15 02:18:47,514 INFO L226 Difference]: Without dead ends: 103 [2021-04-15 02:18:47,515 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:18:47,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-04-15 02:18:47,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 74. [2021-04-15 02:18:47,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5205479452054793) internal successors, (184), 73 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:47,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 184 transitions. [2021-04-15 02:18:47,517 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 184 transitions. Word has length 13 [2021-04-15 02:18:47,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:47,517 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 184 transitions. [2021-04-15 02:18:47,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:47,518 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 184 transitions. [2021-04-15 02:18:47,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:18:47,518 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:47,518 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:47,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-04-15 02:18:47,741 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:47,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:47,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1402289167, now seen corresponding path program 21 times [2021-04-15 02:18:47,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:47,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034919378] [2021-04-15 02:18:47,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:47,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:47,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034919378] [2021-04-15 02:18:47,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517782509] [2021-04-15 02:18:47,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:47,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:18:47,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:47,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 02:18:47,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:47,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:47,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-04-15 02:18:47,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720698943] [2021-04-15 02:18:47,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:18:47,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:47,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:18:47,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:18:47,857 INFO L87 Difference]: Start difference. First operand 74 states and 184 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:47,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:47,933 INFO L93 Difference]: Finished difference Result 107 states and 246 transitions. [2021-04-15 02:18:47,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:18:47,933 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:18:47,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:47,934 INFO L225 Difference]: With dead ends: 107 [2021-04-15 02:18:47,934 INFO L226 Difference]: Without dead ends: 104 [2021-04-15 02:18:47,934 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:18:47,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-04-15 02:18:47,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 73. [2021-04-15 02:18:47,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.5277777777777777) internal successors, (182), 72 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:47,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 182 transitions. [2021-04-15 02:18:47,937 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 182 transitions. Word has length 13 [2021-04-15 02:18:47,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:47,937 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 182 transitions. [2021-04-15 02:18:47,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:47,937 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 182 transitions. [2021-04-15 02:18:47,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:18:47,937 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:47,938 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:48,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:48,160 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:48,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:48,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1114776338, now seen corresponding path program 22 times [2021-04-15 02:18:48,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:48,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110032777] [2021-04-15 02:18:48,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:48,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:48,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110032777] [2021-04-15 02:18:48,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327320599] [2021-04-15 02:18:48,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:48,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:18:48,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:48,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 02:18:48,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:48,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:48,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:48,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-04-15 02:18:48,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604887084] [2021-04-15 02:18:48,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:18:48,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:48,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:18:48,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:18:48,288 INFO L87 Difference]: Start difference. First operand 73 states and 182 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:48,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:48,423 INFO L93 Difference]: Finished difference Result 107 states and 252 transitions. [2021-04-15 02:18:48,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:18:48,423 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:18:48,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:48,424 INFO L225 Difference]: With dead ends: 107 [2021-04-15 02:18:48,424 INFO L226 Difference]: Without dead ends: 107 [2021-04-15 02:18:48,424 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 116.2ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:18:48,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-04-15 02:18:48,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2021-04-15 02:18:48,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.5421686746987953) internal successors, (211), 83 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:48,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 211 transitions. [2021-04-15 02:18:48,427 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 211 transitions. Word has length 13 [2021-04-15 02:18:48,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:48,427 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 211 transitions. [2021-04-15 02:18:48,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:48,427 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 211 transitions. [2021-04-15 02:18:48,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:18:48,428 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:48,428 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:48,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-04-15 02:18:48,641 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:48,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:48,641 INFO L82 PathProgramCache]: Analyzing trace with hash 285571430, now seen corresponding path program 23 times [2021-04-15 02:18:48,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:48,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790562384] [2021-04-15 02:18:48,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:48,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:18:48,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790562384] [2021-04-15 02:18:48,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368317688] [2021-04-15 02:18:48,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:48,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:18:48,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:48,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:18:48,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:18:48,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:48,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-04-15 02:18:48,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80211599] [2021-04-15 02:18:48,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:18:48,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:48,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:18:48,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:18:48,773 INFO L87 Difference]: Start difference. First operand 84 states and 211 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:48,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:48,833 INFO L93 Difference]: Finished difference Result 227 states and 579 transitions. [2021-04-15 02:18:48,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:18:48,833 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:18:48,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:48,835 INFO L225 Difference]: With dead ends: 227 [2021-04-15 02:18:48,835 INFO L226 Difference]: Without dead ends: 225 [2021-04-15 02:18:48,835 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:18:48,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-04-15 02:18:48,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 168. [2021-04-15 02:18:48,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.6347305389221556) internal successors, (440), 167 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:48,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 440 transitions. [2021-04-15 02:18:48,847 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 440 transitions. Word has length 14 [2021-04-15 02:18:48,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:48,848 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 440 transitions. [2021-04-15 02:18:48,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:48,848 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 440 transitions. [2021-04-15 02:18:48,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:18:48,849 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:48,849 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:49,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:49,061 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:49,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:49,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1118463878, now seen corresponding path program 24 times [2021-04-15 02:18:49,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:49,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566773465] [2021-04-15 02:18:49,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:49,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:49,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566773465] [2021-04-15 02:18:49,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365876606] [2021-04-15 02:18:49,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:49,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:18:49,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:49,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 02:18:49,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:49,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:18:49,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:18:49,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:18:49,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:18:49,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:18:49,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-04-15 02:18:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:49,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:49,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-04-15 02:18:49,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861452121] [2021-04-15 02:18:49,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:18:49,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:49,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:18:49,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:18:49,333 INFO L87 Difference]: Start difference. First operand 168 states and 440 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:49,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:49,414 INFO L93 Difference]: Finished difference Result 248 states and 589 transitions. [2021-04-15 02:18:49,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:18:49,415 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:18:49,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:49,417 INFO L225 Difference]: With dead ends: 248 [2021-04-15 02:18:49,417 INFO L226 Difference]: Without dead ends: 245 [2021-04-15 02:18:49,417 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:18:49,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-04-15 02:18:49,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 196. [2021-04-15 02:18:49,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.6666666666666665) internal successors, (520), 195 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:49,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 520 transitions. [2021-04-15 02:18:49,422 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 520 transitions. Word has length 15 [2021-04-15 02:18:49,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:49,423 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 520 transitions. [2021-04-15 02:18:49,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:49,423 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 520 transitions. [2021-04-15 02:18:49,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:18:49,424 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:49,424 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:49,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-04-15 02:18:49,641 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:49,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:49,641 INFO L82 PathProgramCache]: Analyzing trace with hash -678148380, now seen corresponding path program 25 times [2021-04-15 02:18:49,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:49,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507193719] [2021-04-15 02:18:49,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:49,681 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:18:49,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507193719] [2021-04-15 02:18:49,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839170152] [2021-04-15 02:18:49,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:49,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:49,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 02:18:49,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:49,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:18:49,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:18:49,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:18:49,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:18:49,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:18:49,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-04-15 02:18:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:49,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:49,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-04-15 02:18:49,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370165757] [2021-04-15 02:18:49,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:18:49,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:49,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:18:49,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:18:49,851 INFO L87 Difference]: Start difference. First operand 196 states and 520 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:49,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:49,929 INFO L93 Difference]: Finished difference Result 296 states and 729 transitions. [2021-04-15 02:18:49,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:18:49,930 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:18:49,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:49,931 INFO L225 Difference]: With dead ends: 296 [2021-04-15 02:18:49,931 INFO L226 Difference]: Without dead ends: 292 [2021-04-15 02:18:49,932 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:18:49,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-04-15 02:18:49,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 224. [2021-04-15 02:18:49,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.789237668161435) internal successors, (622), 223 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:49,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 622 transitions. [2021-04-15 02:18:49,938 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 622 transitions. Word has length 15 [2021-04-15 02:18:49,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:49,938 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 622 transitions. [2021-04-15 02:18:49,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:49,938 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 622 transitions. [2021-04-15 02:18:49,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:18:49,939 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:49,939 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:50,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-04-15 02:18:50,153 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:50,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:50,153 INFO L82 PathProgramCache]: Analyzing trace with hash -519315694, now seen corresponding path program 26 times [2021-04-15 02:18:50,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:50,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839081635] [2021-04-15 02:18:50,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:18:50,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839081635] [2021-04-15 02:18:50,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884209456] [2021-04-15 02:18:50,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:50,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:18:50,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:50,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 02:18:50,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:50,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:18:50,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:18:50,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:18:50,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:18:50,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:18:50,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-04-15 02:18:50,398 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:50,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:50,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-04-15 02:18:50,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075743752] [2021-04-15 02:18:50,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:18:50,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:50,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:18:50,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:18:50,400 INFO L87 Difference]: Start difference. First operand 224 states and 622 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:50,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:50,496 INFO L93 Difference]: Finished difference Result 353 states and 901 transitions. [2021-04-15 02:18:50,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:18:50,497 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:18:50,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:50,499 INFO L225 Difference]: With dead ends: 353 [2021-04-15 02:18:50,499 INFO L226 Difference]: Without dead ends: 349 [2021-04-15 02:18:50,500 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:18:50,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-04-15 02:18:50,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 269. [2021-04-15 02:18:50,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.906716417910448) internal successors, (779), 268 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:50,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 779 transitions. [2021-04-15 02:18:50,508 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 779 transitions. Word has length 15 [2021-04-15 02:18:50,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:50,508 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 779 transitions. [2021-04-15 02:18:50,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:50,509 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 779 transitions. [2021-04-15 02:18:50,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:18:50,511 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:50,511 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:50,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-04-15 02:18:50,733 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:50,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:50,734 INFO L82 PathProgramCache]: Analyzing trace with hash 109530276, now seen corresponding path program 27 times [2021-04-15 02:18:50,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:50,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612202145] [2021-04-15 02:18:50,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:50,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:18:50,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612202145] [2021-04-15 02:18:50,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250147798] [2021-04-15 02:18:50,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:50,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:18:50,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:50,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 02:18:50,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:50,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:18:50,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:18:50,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:18:50,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:18:50,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:18:50,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-04-15 02:18:50,974 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:50,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:50,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-04-15 02:18:50,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025197077] [2021-04-15 02:18:50,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:18:50,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:50,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:18:50,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:18:50,975 INFO L87 Difference]: Start difference. First operand 269 states and 779 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:51,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:51,062 INFO L93 Difference]: Finished difference Result 397 states and 1046 transitions. [2021-04-15 02:18:51,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:18:51,062 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:18:51,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:51,064 INFO L225 Difference]: With dead ends: 397 [2021-04-15 02:18:51,064 INFO L226 Difference]: Without dead ends: 394 [2021-04-15 02:18:51,065 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:18:51,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-04-15 02:18:51,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 318. [2021-04-15 02:18:51,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.9589905362776023) internal successors, (938), 317 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:51,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 938 transitions. [2021-04-15 02:18:51,074 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 938 transitions. Word has length 15 [2021-04-15 02:18:51,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:51,075 INFO L480 AbstractCegarLoop]: Abstraction has 318 states and 938 transitions. [2021-04-15 02:18:51,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:51,075 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 938 transitions. [2021-04-15 02:18:51,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:18:51,076 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:51,076 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:51,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:51,300 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:51,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:51,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1871081134, now seen corresponding path program 28 times [2021-04-15 02:18:51,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:51,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147531989] [2021-04-15 02:18:51,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:51,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:51,341 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:18:51,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147531989] [2021-04-15 02:18:51,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498875641] [2021-04-15 02:18:51,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:18:51,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:18:51,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:51,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 02:18:51,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:51,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:18:51,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:18:51,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:18:51,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:18:51,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:18:51,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-04-15 02:18:51,508 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:51,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:51,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-04-15 02:18:51,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344175913] [2021-04-15 02:18:51,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:18:51,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:51,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:18:51,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:18:51,511 INFO L87 Difference]: Start difference. First operand 318 states and 938 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:51,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:51,597 INFO L93 Difference]: Finished difference Result 427 states and 1156 transitions. [2021-04-15 02:18:51,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:18:51,598 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:18:51,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:51,600 INFO L225 Difference]: With dead ends: 427 [2021-04-15 02:18:51,600 INFO L226 Difference]: Without dead ends: 424 [2021-04-15 02:18:51,601 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:18:51,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-04-15 02:18:51,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 357. [2021-04-15 02:18:51,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.9831460674157304) internal successors, (1062), 356 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:51,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1062 transitions. [2021-04-15 02:18:51,612 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1062 transitions. Word has length 15 [2021-04-15 02:18:51,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:51,613 INFO L480 AbstractCegarLoop]: Abstraction has 357 states and 1062 transitions. [2021-04-15 02:18:51,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:51,613 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1062 transitions. [2021-04-15 02:18:51,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:18:51,614 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:51,614 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:51,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:51,840 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:51,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:51,841 INFO L82 PathProgramCache]: Analyzing trace with hash 335713551, now seen corresponding path program 29 times [2021-04-15 02:18:51,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:51,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442899033] [2021-04-15 02:18:51,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:51,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:51,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:51,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442899033] [2021-04-15 02:18:51,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677692423] [2021-04-15 02:18:51,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:18:51,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:18:51,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:51,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:18:51,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:51,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:51,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:18:51,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264117874] [2021-04-15 02:18:51,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:18:51,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:51,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:18:51,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:18:51,976 INFO L87 Difference]: Start difference. First operand 357 states and 1062 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:52,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:52,125 INFO L93 Difference]: Finished difference Result 482 states and 1270 transitions. [2021-04-15 02:18:52,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:18:52,125 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:18:52,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:52,128 INFO L225 Difference]: With dead ends: 482 [2021-04-15 02:18:52,128 INFO L226 Difference]: Without dead ends: 475 [2021-04-15 02:18:52,128 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 109.8ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:18:52,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-04-15 02:18:52,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 372. [2021-04-15 02:18:52,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.9838274932614555) internal successors, (1107), 371 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:52,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1107 transitions. [2021-04-15 02:18:52,139 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1107 transitions. Word has length 16 [2021-04-15 02:18:52,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:52,139 INFO L480 AbstractCegarLoop]: Abstraction has 372 states and 1107 transitions. [2021-04-15 02:18:52,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:52,139 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1107 transitions. [2021-04-15 02:18:52,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:18:52,140 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:52,140 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:52,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:52,353 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:52,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:52,353 INFO L82 PathProgramCache]: Analyzing trace with hash 2034224775, now seen corresponding path program 30 times [2021-04-15 02:18:52,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:52,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197291698] [2021-04-15 02:18:52,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:52,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:52,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:52,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197291698] [2021-04-15 02:18:52,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594914236] [2021-04-15 02:18:52,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:52,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:18:52,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:52,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:18:52,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:52,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:52,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:18:52,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004255778] [2021-04-15 02:18:52,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:18:52,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:52,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:18:52,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:18:52,469 INFO L87 Difference]: Start difference. First operand 372 states and 1107 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:52,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:52,537 INFO L93 Difference]: Finished difference Result 490 states and 1284 transitions. [2021-04-15 02:18:52,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:18:52,538 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:18:52,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:52,540 INFO L225 Difference]: With dead ends: 490 [2021-04-15 02:18:52,540 INFO L226 Difference]: Without dead ends: 490 [2021-04-15 02:18:52,540 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:18:52,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-04-15 02:18:52,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 352. [2021-04-15 02:18:52,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.9458689458689458) internal successors, (1034), 351 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:52,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1034 transitions. [2021-04-15 02:18:52,552 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1034 transitions. Word has length 16 [2021-04-15 02:18:52,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:52,553 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 1034 transitions. [2021-04-15 02:18:52,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:52,554 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1034 transitions. [2021-04-15 02:18:52,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:18:52,555 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:52,555 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:52,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:52,776 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:52,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:52,777 INFO L82 PathProgramCache]: Analyzing trace with hash 475308401, now seen corresponding path program 31 times [2021-04-15 02:18:52,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:52,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12472533] [2021-04-15 02:18:52,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:52,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:52,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:52,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12472533] [2021-04-15 02:18:52,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609442449] [2021-04-15 02:18:52,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:52,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:18:52,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:52,884 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:18:52,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:52,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:18:52,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704654231] [2021-04-15 02:18:52,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:18:52,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:52,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:18:52,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:18:52,886 INFO L87 Difference]: Start difference. First operand 352 states and 1034 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:52,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:52,977 INFO L93 Difference]: Finished difference Result 466 states and 1205 transitions. [2021-04-15 02:18:52,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:18:52,977 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:18:52,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:52,980 INFO L225 Difference]: With dead ends: 466 [2021-04-15 02:18:52,980 INFO L226 Difference]: Without dead ends: 464 [2021-04-15 02:18:52,980 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:18:52,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-04-15 02:18:52,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 360. [2021-04-15 02:18:52,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.9442896935933147) internal successors, (1057), 359 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:52,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1057 transitions. [2021-04-15 02:18:52,990 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1057 transitions. Word has length 16 [2021-04-15 02:18:52,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:52,990 INFO L480 AbstractCegarLoop]: Abstraction has 360 states and 1057 transitions. [2021-04-15 02:18:52,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:52,990 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1057 transitions. [2021-04-15 02:18:52,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:18:52,991 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:52,991 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:53,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-04-15 02:18:53,212 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:53,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:53,213 INFO L82 PathProgramCache]: Analyzing trace with hash -2101909835, now seen corresponding path program 32 times [2021-04-15 02:18:53,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:53,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119786334] [2021-04-15 02:18:53,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:53,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:53,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119786334] [2021-04-15 02:18:53,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321621184] [2021-04-15 02:18:53,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:53,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:18:53,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:53,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:18:53,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:53,318 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:53,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:53,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:18:53,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760162884] [2021-04-15 02:18:53,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:18:53,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:53,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:18:53,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:18:53,319 INFO L87 Difference]: Start difference. First operand 360 states and 1057 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:53,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:53,364 INFO L93 Difference]: Finished difference Result 501 states and 1267 transitions. [2021-04-15 02:18:53,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:18:53,364 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:18:53,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:53,366 INFO L225 Difference]: With dead ends: 501 [2021-04-15 02:18:53,367 INFO L226 Difference]: Without dead ends: 501 [2021-04-15 02:18:53,367 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:18:53,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-04-15 02:18:53,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 362. [2021-04-15 02:18:53,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.9445983379501386) internal successors, (1063), 361 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:53,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1063 transitions. [2021-04-15 02:18:53,377 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1063 transitions. Word has length 16 [2021-04-15 02:18:53,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:53,377 INFO L480 AbstractCegarLoop]: Abstraction has 362 states and 1063 transitions. [2021-04-15 02:18:53,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:53,377 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1063 transitions. [2021-04-15 02:18:53,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:18:53,378 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:53,378 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:53,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:53,600 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:53,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:53,601 INFO L82 PathProgramCache]: Analyzing trace with hash 464010127, now seen corresponding path program 33 times [2021-04-15 02:18:53,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:53,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990213441] [2021-04-15 02:18:53,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:53,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:53,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990213441] [2021-04-15 02:18:53,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497991180] [2021-04-15 02:18:53,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:53,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:18:53,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:53,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:18:53,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:53,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:53,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:18:53,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967656638] [2021-04-15 02:18:53,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:18:53,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:53,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:18:53,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:18:53,730 INFO L87 Difference]: Start difference. First operand 362 states and 1063 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:53,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:53,811 INFO L93 Difference]: Finished difference Result 535 states and 1337 transitions. [2021-04-15 02:18:53,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:18:53,812 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:18:53,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:53,815 INFO L225 Difference]: With dead ends: 535 [2021-04-15 02:18:53,815 INFO L226 Difference]: Without dead ends: 535 [2021-04-15 02:18:53,815 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:18:53,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-04-15 02:18:53,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 337. [2021-04-15 02:18:53,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.8988095238095237) internal successors, (974), 336 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:53,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 974 transitions. [2021-04-15 02:18:53,828 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 974 transitions. Word has length 16 [2021-04-15 02:18:53,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:53,828 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 974 transitions. [2021-04-15 02:18:53,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:53,828 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 974 transitions. [2021-04-15 02:18:53,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:18:53,829 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:53,829 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:54,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-04-15 02:18:54,054 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:54,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:54,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1104154371, now seen corresponding path program 34 times [2021-04-15 02:18:54,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:54,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133355738] [2021-04-15 02:18:54,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:54,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:54,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133355738] [2021-04-15 02:18:54,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385582636] [2021-04-15 02:18:54,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:54,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:18:54,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:54,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:18:54,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:54,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:18:54,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:54,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:18:54,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367184831] [2021-04-15 02:18:54,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:18:54,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:54,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:18:54,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:18:54,160 INFO L87 Difference]: Start difference. First operand 337 states and 974 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:54,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:54,253 INFO L93 Difference]: Finished difference Result 456 states and 1159 transitions. [2021-04-15 02:18:54,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:18:54,254 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:18:54,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:54,256 INFO L225 Difference]: With dead ends: 456 [2021-04-15 02:18:54,256 INFO L226 Difference]: Without dead ends: 454 [2021-04-15 02:18:54,256 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:18:54,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-04-15 02:18:54,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 348. [2021-04-15 02:18:54,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.893371757925072) internal successors, (1004), 347 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:54,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1004 transitions. [2021-04-15 02:18:54,267 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1004 transitions. Word has length 16 [2021-04-15 02:18:54,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:54,267 INFO L480 AbstractCegarLoop]: Abstraction has 348 states and 1004 transitions. [2021-04-15 02:18:54,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:54,268 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1004 transitions. [2021-04-15 02:18:54,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:18:54,269 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:54,269 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:54,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:54,494 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:54,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:54,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1473063865, now seen corresponding path program 35 times [2021-04-15 02:18:54,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:54,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818290865] [2021-04-15 02:18:54,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:54,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:54,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:18:54,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818290865] [2021-04-15 02:18:54,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062159163] [2021-04-15 02:18:54,541 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:18:54,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:18:54,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:54,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:54,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:54,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:18:54,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:54,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:18:54,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468230639] [2021-04-15 02:18:54,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:18:54,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:54,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:18:54,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:18:54,628 INFO L87 Difference]: Start difference. First operand 348 states and 1004 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:54,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:54,674 INFO L93 Difference]: Finished difference Result 447 states and 1123 transitions. [2021-04-15 02:18:54,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:18:54,675 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:18:54,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:54,677 INFO L225 Difference]: With dead ends: 447 [2021-04-15 02:18:54,677 INFO L226 Difference]: Without dead ends: 447 [2021-04-15 02:18:54,677 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:18:54,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-04-15 02:18:54,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 336. [2021-04-15 02:18:54,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.8656716417910446) internal successors, (960), 335 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:54,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 960 transitions. [2021-04-15 02:18:54,688 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 960 transitions. Word has length 16 [2021-04-15 02:18:54,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:54,688 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 960 transitions. [2021-04-15 02:18:54,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:54,688 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 960 transitions. [2021-04-15 02:18:54,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:18:54,689 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:54,689 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:54,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-04-15 02:18:54,915 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:54,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:54,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1092856097, now seen corresponding path program 36 times [2021-04-15 02:18:54,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:54,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007798656] [2021-04-15 02:18:54,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:54,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:54,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007798656] [2021-04-15 02:18:54,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261837123] [2021-04-15 02:18:54,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:54,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:18:54,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:54,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:18:54,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:55,039 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:55,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:55,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:18:55,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887089290] [2021-04-15 02:18:55,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:18:55,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:55,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:18:55,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:18:55,040 INFO L87 Difference]: Start difference. First operand 336 states and 960 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:55,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:55,119 INFO L93 Difference]: Finished difference Result 482 states and 1184 transitions. [2021-04-15 02:18:55,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:18:55,120 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:18:55,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:55,122 INFO L225 Difference]: With dead ends: 482 [2021-04-15 02:18:55,123 INFO L226 Difference]: Without dead ends: 482 [2021-04-15 02:18:55,123 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:18:55,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-04-15 02:18:55,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 310. [2021-04-15 02:18:55,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.822006472491909) internal successors, (872), 309 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:55,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 872 transitions. [2021-04-15 02:18:55,135 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 872 transitions. Word has length 16 [2021-04-15 02:18:55,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:55,135 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 872 transitions. [2021-04-15 02:18:55,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:55,135 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 872 transitions. [2021-04-15 02:18:55,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:18:55,136 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:55,136 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:55,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-04-15 02:18:55,364 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:55,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:55,364 INFO L82 PathProgramCache]: Analyzing trace with hash -968003705, now seen corresponding path program 37 times [2021-04-15 02:18:55,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:55,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45298116] [2021-04-15 02:18:55,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:55,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:55,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45298116] [2021-04-15 02:18:55,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020498738] [2021-04-15 02:18:55,419 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:55,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:18:55,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:55,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:55,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:55,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:18:55,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292949470] [2021-04-15 02:18:55,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:18:55,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:55,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:18:55,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:18:55,481 INFO L87 Difference]: Start difference. First operand 310 states and 872 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:55,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:55,594 INFO L93 Difference]: Finished difference Result 536 states and 1380 transitions. [2021-04-15 02:18:55,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:18:55,595 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:18:55,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:55,597 INFO L225 Difference]: With dead ends: 536 [2021-04-15 02:18:55,598 INFO L226 Difference]: Without dead ends: 536 [2021-04-15 02:18:55,598 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:18:55,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-04-15 02:18:55,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 382. [2021-04-15 02:18:55,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.9448818897637796) internal successors, (1122), 381 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:55,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1122 transitions. [2021-04-15 02:18:55,609 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1122 transitions. Word has length 16 [2021-04-15 02:18:55,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:55,609 INFO L480 AbstractCegarLoop]: Abstraction has 382 states and 1122 transitions. [2021-04-15 02:18:55,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:55,610 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1122 transitions. [2021-04-15 02:18:55,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:18:55,610 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:55,611 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:55,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:55,833 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:55,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:55,833 INFO L82 PathProgramCache]: Analyzing trace with hash -557719857, now seen corresponding path program 38 times [2021-04-15 02:18:55,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:55,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341058029] [2021-04-15 02:18:55,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:55,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:55,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341058029] [2021-04-15 02:18:55,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093404002] [2021-04-15 02:18:55,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:18:55,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:18:55,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:55,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:18:55,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:55,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:18:55,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:55,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:18:55,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508312127] [2021-04-15 02:18:55,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:18:55,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:55,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:18:55,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:18:55,931 INFO L87 Difference]: Start difference. First operand 382 states and 1122 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:56,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:56,039 INFO L93 Difference]: Finished difference Result 493 states and 1315 transitions. [2021-04-15 02:18:56,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:18:56,039 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:18:56,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:56,041 INFO L225 Difference]: With dead ends: 493 [2021-04-15 02:18:56,041 INFO L226 Difference]: Without dead ends: 489 [2021-04-15 02:18:56,041 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:18:56,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-04-15 02:18:56,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 406. [2021-04-15 02:18:56,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.9703703703703703) internal successors, (1203), 405 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:56,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1203 transitions. [2021-04-15 02:18:56,051 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1203 transitions. Word has length 16 [2021-04-15 02:18:56,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:56,051 INFO L480 AbstractCegarLoop]: Abstraction has 406 states and 1203 transitions. [2021-04-15 02:18:56,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:56,052 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1203 transitions. [2021-04-15 02:18:56,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:18:56,053 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:56,053 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:56,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-04-15 02:18:56,269 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:56,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:56,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1852698447, now seen corresponding path program 39 times [2021-04-15 02:18:56,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:56,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494618981] [2021-04-15 02:18:56,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:56,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:56,318 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:56,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494618981] [2021-04-15 02:18:56,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237375049] [2021-04-15 02:18:56,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:56,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:18:56,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:56,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:18:56,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:56,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:56,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:56,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:18:56,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597977483] [2021-04-15 02:18:56,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:18:56,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:56,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:18:56,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:18:56,385 INFO L87 Difference]: Start difference. First operand 406 states and 1203 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:56,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:56,490 INFO L93 Difference]: Finished difference Result 566 states and 1493 transitions. [2021-04-15 02:18:56,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:18:56,490 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:18:56,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:56,492 INFO L225 Difference]: With dead ends: 566 [2021-04-15 02:18:56,492 INFO L226 Difference]: Without dead ends: 566 [2021-04-15 02:18:56,493 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:18:56,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-04-15 02:18:56,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 372. [2021-04-15 02:18:56,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.91644204851752) internal successors, (1082), 371 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:56,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1082 transitions. [2021-04-15 02:18:56,504 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1082 transitions. Word has length 16 [2021-04-15 02:18:56,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:56,504 INFO L480 AbstractCegarLoop]: Abstraction has 372 states and 1082 transitions. [2021-04-15 02:18:56,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:56,504 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1082 transitions. [2021-04-15 02:18:56,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:18:56,505 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:56,505 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:56,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:56,721 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:56,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:56,721 INFO L82 PathProgramCache]: Analyzing trace with hash -876457039, now seen corresponding path program 40 times [2021-04-15 02:18:56,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:56,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103715834] [2021-04-15 02:18:56,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:56,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:56,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:56,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103715834] [2021-04-15 02:18:56,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622532797] [2021-04-15 02:18:56,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:56,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:18:56,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:56,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:18:56,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:56,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:18:56,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:56,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:18:56,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073040952] [2021-04-15 02:18:56,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:18:56,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:56,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:18:56,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:18:56,810 INFO L87 Difference]: Start difference. First operand 372 states and 1082 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:56,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:56,893 INFO L93 Difference]: Finished difference Result 471 states and 1219 transitions. [2021-04-15 02:18:56,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:18:56,894 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:18:56,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:56,896 INFO L225 Difference]: With dead ends: 471 [2021-04-15 02:18:56,896 INFO L226 Difference]: Without dead ends: 467 [2021-04-15 02:18:56,896 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:18:56,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-04-15 02:18:56,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 379. [2021-04-15 02:18:56,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.9153439153439153) internal successors, (1102), 378 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:56,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1102 transitions. [2021-04-15 02:18:56,905 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1102 transitions. Word has length 16 [2021-04-15 02:18:56,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:56,905 INFO L480 AbstractCegarLoop]: Abstraction has 379 states and 1102 transitions. [2021-04-15 02:18:56,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:56,905 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1102 transitions. [2021-04-15 02:18:56,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:18:56,906 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:56,906 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:57,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:57,119 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:57,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:57,119 INFO L82 PathProgramCache]: Analyzing trace with hash 841292021, now seen corresponding path program 41 times [2021-04-15 02:18:57,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:57,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028945090] [2021-04-15 02:18:57,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:57,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:57,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028945090] [2021-04-15 02:18:57,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439898280] [2021-04-15 02:18:57,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:57,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:18:57,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:57,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:18:57,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:57,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:57,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:57,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:18:57,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219708344] [2021-04-15 02:18:57,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:18:57,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:57,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:18:57,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:18:57,225 INFO L87 Difference]: Start difference. First operand 379 states and 1102 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:57,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:57,276 INFO L93 Difference]: Finished difference Result 489 states and 1264 transitions. [2021-04-15 02:18:57,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:18:57,277 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:18:57,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:57,278 INFO L225 Difference]: With dead ends: 489 [2021-04-15 02:18:57,278 INFO L226 Difference]: Without dead ends: 489 [2021-04-15 02:18:57,279 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:18:57,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-04-15 02:18:57,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 380. [2021-04-15 02:18:57,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.9155672823219) internal successors, (1105), 379 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:57,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1105 transitions. [2021-04-15 02:18:57,287 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1105 transitions. Word has length 16 [2021-04-15 02:18:57,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:57,287 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 1105 transitions. [2021-04-15 02:18:57,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:57,287 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1105 transitions. [2021-04-15 02:18:57,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:18:57,288 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:57,288 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:57,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:57,509 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:57,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:57,509 INFO L82 PathProgramCache]: Analyzing trace with hash -887755313, now seen corresponding path program 42 times [2021-04-15 02:18:57,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:57,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534653340] [2021-04-15 02:18:57,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:57,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:57,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:18:57,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534653340] [2021-04-15 02:18:57,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612905723] [2021-04-15 02:18:57,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:57,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:18:57,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:57,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:18:57,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:57,617 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:18:57,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:57,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:18:57,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845263065] [2021-04-15 02:18:57,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:18:57,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:57,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:18:57,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:18:57,619 INFO L87 Difference]: Start difference. First operand 380 states and 1105 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:57,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:57,679 INFO L93 Difference]: Finished difference Result 456 states and 1186 transitions. [2021-04-15 02:18:57,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:18:57,679 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:18:57,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:57,681 INFO L225 Difference]: With dead ends: 456 [2021-04-15 02:18:57,682 INFO L226 Difference]: Without dead ends: 456 [2021-04-15 02:18:57,682 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:18:57,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-04-15 02:18:57,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 359. [2021-04-15 02:18:57,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.8910614525139664) internal successors, (1035), 358 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:57,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1035 transitions. [2021-04-15 02:18:57,691 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1035 transitions. Word has length 16 [2021-04-15 02:18:57,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:57,691 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 1035 transitions. [2021-04-15 02:18:57,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:57,691 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1035 transitions. [2021-04-15 02:18:57,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:18:57,692 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:57,692 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:57,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:57,909 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:57,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:57,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1346352181, now seen corresponding path program 43 times [2021-04-15 02:18:57,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:57,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303715279] [2021-04-15 02:18:57,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:57,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:57,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303715279] [2021-04-15 02:18:57,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362017235] [2021-04-15 02:18:57,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:57,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:57,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:18:57,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:58,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:58,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:18:58,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942251807] [2021-04-15 02:18:58,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:18:58,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:58,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:18:58,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:18:58,021 INFO L87 Difference]: Start difference. First operand 359 states and 1035 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:58,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:58,112 INFO L93 Difference]: Finished difference Result 466 states and 1194 transitions. [2021-04-15 02:18:58,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:18:58,112 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:18:58,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:58,114 INFO L225 Difference]: With dead ends: 466 [2021-04-15 02:18:58,115 INFO L226 Difference]: Without dead ends: 466 [2021-04-15 02:18:58,115 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:18:58,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-04-15 02:18:58,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 341. [2021-04-15 02:18:58,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.864705882352941) internal successors, (974), 340 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:58,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 974 transitions. [2021-04-15 02:18:58,123 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 974 transitions. Word has length 16 [2021-04-15 02:18:58,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:58,123 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 974 transitions. [2021-04-15 02:18:58,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:58,123 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 974 transitions. [2021-04-15 02:18:58,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:18:58,124 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:58,124 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:58,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-04-15 02:18:58,347 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:58,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:58,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1884207759, now seen corresponding path program 44 times [2021-04-15 02:18:58,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:58,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794157115] [2021-04-15 02:18:58,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:58,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:58,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794157115] [2021-04-15 02:18:58,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667371456] [2021-04-15 02:18:58,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:58,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:18:58,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:58,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:18:58,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:58,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:58,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:58,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:18:58,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906590159] [2021-04-15 02:18:58,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:18:58,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:58,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:18:58,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:18:58,503 INFO L87 Difference]: Start difference. First operand 341 states and 974 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:58,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:58,645 INFO L93 Difference]: Finished difference Result 533 states and 1377 transitions. [2021-04-15 02:18:58,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:18:58,646 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:18:58,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:58,648 INFO L225 Difference]: With dead ends: 533 [2021-04-15 02:18:58,648 INFO L226 Difference]: Without dead ends: 533 [2021-04-15 02:18:58,649 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 117.7ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:18:58,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-04-15 02:18:58,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 403. [2021-04-15 02:18:58,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.9203980099502487) internal successors, (1174), 402 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:58,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1174 transitions. [2021-04-15 02:18:58,658 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1174 transitions. Word has length 16 [2021-04-15 02:18:58,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:58,659 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 1174 transitions. [2021-04-15 02:18:58,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:58,659 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1174 transitions. [2021-04-15 02:18:58,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:18:58,660 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:58,660 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:58,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:58,861 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:58,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:58,861 INFO L82 PathProgramCache]: Analyzing trace with hash 984700935, now seen corresponding path program 45 times [2021-04-15 02:18:58,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:58,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785200678] [2021-04-15 02:18:58,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:58,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:58,918 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:58,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785200678] [2021-04-15 02:18:58,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710006631] [2021-04-15 02:18:58,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:58,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:18:58,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:58,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:18:58,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:58,978 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:58,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:58,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-04-15 02:18:58,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148336037] [2021-04-15 02:18:58,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:18:58,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:58,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:18:58,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:18:58,980 INFO L87 Difference]: Start difference. First operand 403 states and 1174 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:59,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:59,124 INFO L93 Difference]: Finished difference Result 489 states and 1285 transitions. [2021-04-15 02:18:59,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:18:59,124 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:18:59,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:59,126 INFO L225 Difference]: With dead ends: 489 [2021-04-15 02:18:59,126 INFO L226 Difference]: Without dead ends: 485 [2021-04-15 02:18:59,126 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 111.4ms TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:18:59,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-04-15 02:18:59,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 391. [2021-04-15 02:18:59,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.9) internal successors, (1131), 390 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:59,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1131 transitions. [2021-04-15 02:18:59,135 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1131 transitions. Word has length 16 [2021-04-15 02:18:59,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:59,135 INFO L480 AbstractCegarLoop]: Abstraction has 391 states and 1131 transitions. [2021-04-15 02:18:59,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:59,135 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1131 transitions. [2021-04-15 02:18:59,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:18:59,136 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:59,136 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:59,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-04-15 02:18:59,353 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:59,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:59,353 INFO L82 PathProgramCache]: Analyzing trace with hash -868338745, now seen corresponding path program 46 times [2021-04-15 02:18:59,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:59,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796091889] [2021-04-15 02:18:59,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:59,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:59,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:59,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796091889] [2021-04-15 02:18:59,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954980717] [2021-04-15 02:18:59,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:59,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:18:59,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:59,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:18:59,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:59,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:59,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:59,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-04-15 02:18:59,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737308048] [2021-04-15 02:18:59,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:18:59,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:59,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:18:59,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:18:59,491 INFO L87 Difference]: Start difference. First operand 391 states and 1131 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:59,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:59,660 INFO L93 Difference]: Finished difference Result 523 states and 1384 transitions. [2021-04-15 02:18:59,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:18:59,660 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:18:59,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:59,662 INFO L225 Difference]: With dead ends: 523 [2021-04-15 02:18:59,662 INFO L226 Difference]: Without dead ends: 523 [2021-04-15 02:18:59,663 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 152.7ms TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:18:59,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-04-15 02:18:59,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 386. [2021-04-15 02:18:59,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.8935064935064934) internal successors, (1114), 385 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:59,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1114 transitions. [2021-04-15 02:18:59,671 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1114 transitions. Word has length 16 [2021-04-15 02:18:59,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:59,671 INFO L480 AbstractCegarLoop]: Abstraction has 386 states and 1114 transitions. [2021-04-15 02:18:59,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:59,671 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1114 transitions. [2021-04-15 02:18:59,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:18:59,672 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:59,673 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:59,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:59,889 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:59,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:59,889 INFO L82 PathProgramCache]: Analyzing trace with hash -2145868605, now seen corresponding path program 47 times [2021-04-15 02:18:59,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:59,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583131370] [2021-04-15 02:18:59,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:59,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:59,957 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:59,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583131370] [2021-04-15 02:18:59,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533622352] [2021-04-15 02:18:59,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:59,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:18:59,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:59,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:18:59,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:00,029 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:00,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:00,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2021-04-15 02:19:00,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129846574] [2021-04-15 02:19:00,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:19:00,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:00,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:19:00,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:19:00,031 INFO L87 Difference]: Start difference. First operand 386 states and 1114 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:00,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:00,149 INFO L93 Difference]: Finished difference Result 454 states and 1208 transitions. [2021-04-15 02:19:00,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:19:00,150 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:19:00,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:00,152 INFO L225 Difference]: With dead ends: 454 [2021-04-15 02:19:00,152 INFO L226 Difference]: Without dead ends: 452 [2021-04-15 02:19:00,153 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:19:00,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-04-15 02:19:00,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 395. [2021-04-15 02:19:00,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.8984771573604062) internal successors, (1142), 394 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:00,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1142 transitions. [2021-04-15 02:19:00,160 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1142 transitions. Word has length 16 [2021-04-15 02:19:00,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:00,161 INFO L480 AbstractCegarLoop]: Abstraction has 395 states and 1142 transitions. [2021-04-15 02:19:00,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:00,161 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1142 transitions. [2021-04-15 02:19:00,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:19:00,162 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:00,162 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:00,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:00,377 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:00,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:00,377 INFO L82 PathProgramCache]: Analyzing trace with hash -428119545, now seen corresponding path program 48 times [2021-04-15 02:19:00,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:00,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413340934] [2021-04-15 02:19:00,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:00,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:00,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413340934] [2021-04-15 02:19:00,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029561761] [2021-04-15 02:19:00,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:00,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:19:00,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:00,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:19:00,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:00,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:00,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:00,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2021-04-15 02:19:00,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351991988] [2021-04-15 02:19:00,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:19:00,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:00,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:19:00,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:19:00,487 INFO L87 Difference]: Start difference. First operand 395 states and 1142 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:00,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:00,585 INFO L93 Difference]: Finished difference Result 476 states and 1251 transitions. [2021-04-15 02:19:00,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:19:00,585 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:19:00,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:00,586 INFO L225 Difference]: With dead ends: 476 [2021-04-15 02:19:00,586 INFO L226 Difference]: Without dead ends: 476 [2021-04-15 02:19:00,587 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:19:00,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-04-15 02:19:00,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 396. [2021-04-15 02:19:00,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.8936708860759492) internal successors, (1143), 395 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:00,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1143 transitions. [2021-04-15 02:19:00,594 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1143 transitions. Word has length 16 [2021-04-15 02:19:00,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:00,594 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 1143 transitions. [2021-04-15 02:19:00,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:00,594 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1143 transitions. [2021-04-15 02:19:00,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:19:00,595 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:00,595 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:00,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-04-15 02:19:00,809 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:00,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:00,809 INFO L82 PathProgramCache]: Analyzing trace with hash 2137800417, now seen corresponding path program 49 times [2021-04-15 02:19:00,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:00,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736507147] [2021-04-15 02:19:00,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:00,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:00,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736507147] [2021-04-15 02:19:00,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515012944] [2021-04-15 02:19:00,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:00,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:19:00,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:00,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:00,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:00,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-04-15 02:19:00,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930653589] [2021-04-15 02:19:00,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:19:00,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:00,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:19:00,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:19:00,953 INFO L87 Difference]: Start difference. First operand 396 states and 1143 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:01,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:01,054 INFO L93 Difference]: Finished difference Result 482 states and 1265 transitions. [2021-04-15 02:19:01,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:19:01,055 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:19:01,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:01,056 INFO L225 Difference]: With dead ends: 482 [2021-04-15 02:19:01,056 INFO L226 Difference]: Without dead ends: 482 [2021-04-15 02:19:01,057 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:19:01,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-04-15 02:19:01,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 397. [2021-04-15 02:19:01,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.893939393939394) internal successors, (1146), 396 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:01,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1146 transitions. [2021-04-15 02:19:01,066 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1146 transitions. Word has length 16 [2021-04-15 02:19:01,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:01,066 INFO L480 AbstractCegarLoop]: Abstraction has 397 states and 1146 transitions. [2021-04-15 02:19:01,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:01,066 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1146 transitions. [2021-04-15 02:19:01,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:19:01,067 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:01,067 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:01,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:01,281 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:01,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:01,281 INFO L82 PathProgramCache]: Analyzing trace with hash 76940615, now seen corresponding path program 50 times [2021-04-15 02:19:01,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:01,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599628387] [2021-04-15 02:19:01,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:01,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:01,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599628387] [2021-04-15 02:19:01,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49952529] [2021-04-15 02:19:01,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:01,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:19:01,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:01,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:19:01,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:01,420 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:01,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:01,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-04-15 02:19:01,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846585721] [2021-04-15 02:19:01,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:19:01,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:01,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:19:01,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:19:01,422 INFO L87 Difference]: Start difference. First operand 397 states and 1146 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:01,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:01,554 INFO L93 Difference]: Finished difference Result 476 states and 1290 transitions. [2021-04-15 02:19:01,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:19:01,555 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:19:01,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:01,556 INFO L225 Difference]: With dead ends: 476 [2021-04-15 02:19:01,557 INFO L226 Difference]: Without dead ends: 476 [2021-04-15 02:19:01,557 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 119.2ms TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:19:01,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-04-15 02:19:01,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 420. [2021-04-15 02:19:01,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.911694510739857) internal successors, (1220), 419 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:01,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1220 transitions. [2021-04-15 02:19:01,565 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1220 transitions. Word has length 16 [2021-04-15 02:19:01,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:01,565 INFO L480 AbstractCegarLoop]: Abstraction has 420 states and 1220 transitions. [2021-04-15 02:19:01,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:01,565 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1220 transitions. [2021-04-15 02:19:01,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:19:01,566 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:01,566 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:01,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-04-15 02:19:01,773 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:01,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:01,773 INFO L82 PathProgramCache]: Analyzing trace with hash 614796193, now seen corresponding path program 51 times [2021-04-15 02:19:01,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:01,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123527500] [2021-04-15 02:19:01,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:01,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:01,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:01,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123527500] [2021-04-15 02:19:01,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707435547] [2021-04-15 02:19:01,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:01,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:19:01,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:01,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:19:01,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:01,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:01,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:01,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-04-15 02:19:01,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50341140] [2021-04-15 02:19:01,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:19:01,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:01,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:19:01,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:19:01,901 INFO L87 Difference]: Start difference. First operand 420 states and 1220 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:02,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:02,054 INFO L93 Difference]: Finished difference Result 486 states and 1311 transitions. [2021-04-15 02:19:02,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:19:02,054 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:19:02,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:02,056 INFO L225 Difference]: With dead ends: 486 [2021-04-15 02:19:02,056 INFO L226 Difference]: Without dead ends: 486 [2021-04-15 02:19:02,056 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 145.0ms TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:19:02,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-04-15 02:19:02,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 416. [2021-04-15 02:19:02,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.908433734939759) internal successors, (1207), 415 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:02,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1207 transitions. [2021-04-15 02:19:02,063 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1207 transitions. Word has length 16 [2021-04-15 02:19:02,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:02,064 INFO L480 AbstractCegarLoop]: Abstraction has 416 states and 1207 transitions. [2021-04-15 02:19:02,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:02,064 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1207 transitions. [2021-04-15 02:19:02,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:19:02,065 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:02,065 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:02,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-04-15 02:19:02,281 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:02,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:02,281 INFO L82 PathProgramCache]: Analyzing trace with hash 108449927, now seen corresponding path program 52 times [2021-04-15 02:19:02,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:02,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317994040] [2021-04-15 02:19:02,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:02,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:02,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317994040] [2021-04-15 02:19:02,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430407795] [2021-04-15 02:19:02,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:02,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:19:02,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:02,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:19:02,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:02,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:02,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:02,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 02:19:02,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469299158] [2021-04-15 02:19:02,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:19:02,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:02,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:19:02,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:19:02,441 INFO L87 Difference]: Start difference. First operand 416 states and 1207 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:02,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:02,639 INFO L93 Difference]: Finished difference Result 533 states and 1453 transitions. [2021-04-15 02:19:02,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:19:02,639 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:19:02,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:02,641 INFO L225 Difference]: With dead ends: 533 [2021-04-15 02:19:02,641 INFO L226 Difference]: Without dead ends: 533 [2021-04-15 02:19:02,641 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 190.8ms TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:19:02,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-04-15 02:19:02,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 424. [2021-04-15 02:19:02,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 2.9125295508274234) internal successors, (1232), 423 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:02,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1232 transitions. [2021-04-15 02:19:02,648 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1232 transitions. Word has length 16 [2021-04-15 02:19:02,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:02,648 INFO L480 AbstractCegarLoop]: Abstraction has 424 states and 1232 transitions. [2021-04-15 02:19:02,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:02,649 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1232 transitions. [2021-04-15 02:19:02,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:19:02,649 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:02,650 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:02,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-04-15 02:19:02,873 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:02,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:02,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1580915834, now seen corresponding path program 53 times [2021-04-15 02:19:02,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:02,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770539161] [2021-04-15 02:19:02,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:02,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:02,929 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:02,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770539161] [2021-04-15 02:19:02,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835804291] [2021-04-15 02:19:02,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:02,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:19:02,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:02,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:19:02,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:03,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:03,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-04-15 02:19:03,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368430579] [2021-04-15 02:19:03,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:19:03,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:03,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:19:03,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:19:03,036 INFO L87 Difference]: Start difference. First operand 424 states and 1232 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:03,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:03,150 INFO L93 Difference]: Finished difference Result 523 states and 1364 transitions. [2021-04-15 02:19:03,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:19:03,150 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:19:03,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:03,152 INFO L225 Difference]: With dead ends: 523 [2021-04-15 02:19:03,152 INFO L226 Difference]: Without dead ends: 517 [2021-04-15 02:19:03,152 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:19:03,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-04-15 02:19:03,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 417. [2021-04-15 02:19:03,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.8774038461538463) internal successors, (1197), 416 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:03,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1197 transitions. [2021-04-15 02:19:03,158 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1197 transitions. Word has length 17 [2021-04-15 02:19:03,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:03,158 INFO L480 AbstractCegarLoop]: Abstraction has 417 states and 1197 transitions. [2021-04-15 02:19:03,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:03,158 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1197 transitions. [2021-04-15 02:19:03,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:19:03,159 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:03,159 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:03,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-04-15 02:19:03,362 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:03,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:03,362 INFO L82 PathProgramCache]: Analyzing trace with hash 237372592, now seen corresponding path program 54 times [2021-04-15 02:19:03,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:03,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372213314] [2021-04-15 02:19:03,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:03,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:03,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372213314] [2021-04-15 02:19:03,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621666803] [2021-04-15 02:19:03,421 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:03,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:19:03,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:03,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:19:03,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:03,479 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:03,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:03,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:19:03,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353031170] [2021-04-15 02:19:03,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:19:03,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:03,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:19:03,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:19:03,480 INFO L87 Difference]: Start difference. First operand 417 states and 1197 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:03,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:03,563 INFO L93 Difference]: Finished difference Result 436 states and 1230 transitions. [2021-04-15 02:19:03,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:19:03,563 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:19:03,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:03,564 INFO L225 Difference]: With dead ends: 436 [2021-04-15 02:19:03,564 INFO L226 Difference]: Without dead ends: 434 [2021-04-15 02:19:03,565 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:19:03,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-04-15 02:19:03,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 417. [2021-04-15 02:19:03,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.8677884615384617) internal successors, (1193), 416 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:03,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1193 transitions. [2021-04-15 02:19:03,570 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1193 transitions. Word has length 17 [2021-04-15 02:19:03,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:03,571 INFO L480 AbstractCegarLoop]: Abstraction has 417 states and 1193 transitions. [2021-04-15 02:19:03,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:03,571 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1193 transitions. [2021-04-15 02:19:03,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:19:03,572 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:03,572 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:03,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:03,794 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:03,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:03,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1705117860, now seen corresponding path program 55 times [2021-04-15 02:19:03,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:03,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847114057] [2021-04-15 02:19:03,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:03,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:03,835 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:03,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847114057] [2021-04-15 02:19:03,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704816893] [2021-04-15 02:19:03,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:19:03,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:03,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:19:03,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:03,905 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:19:03,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:03,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:19:03,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399052528] [2021-04-15 02:19:03,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:19:03,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:03,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:19:03,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:19:03,906 INFO L87 Difference]: Start difference. First operand 417 states and 1193 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:03,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:03,952 INFO L93 Difference]: Finished difference Result 505 states and 1323 transitions. [2021-04-15 02:19:03,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:19:03,952 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:19:03,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:03,954 INFO L225 Difference]: With dead ends: 505 [2021-04-15 02:19:03,954 INFO L226 Difference]: Without dead ends: 503 [2021-04-15 02:19:03,955 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:19:03,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-04-15 02:19:03,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 420. [2021-04-15 02:19:03,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.863961813842482) internal successors, (1200), 419 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:03,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1200 transitions. [2021-04-15 02:19:03,961 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1200 transitions. Word has length 17 [2021-04-15 02:19:03,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:03,961 INFO L480 AbstractCegarLoop]: Abstraction has 420 states and 1200 transitions. [2021-04-15 02:19:03,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:03,962 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1200 transitions. [2021-04-15 02:19:03,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:19:03,962 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:03,962 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:04,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-04-15 02:19:04,185 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:04,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:04,185 INFO L82 PathProgramCache]: Analyzing trace with hash -844394746, now seen corresponding path program 56 times [2021-04-15 02:19:04,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:04,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327237370] [2021-04-15 02:19:04,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:04,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:04,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327237370] [2021-04-15 02:19:04,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526102531] [2021-04-15 02:19:04,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:04,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:19:04,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:04,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:19:04,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:04,282 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:19:04,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:04,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-04-15 02:19:04,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331358823] [2021-04-15 02:19:04,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:19:04,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:04,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:19:04,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:19:04,283 INFO L87 Difference]: Start difference. First operand 420 states and 1200 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:04,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:04,344 INFO L93 Difference]: Finished difference Result 516 states and 1337 transitions. [2021-04-15 02:19:04,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:19:04,344 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:19:04,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:04,346 INFO L225 Difference]: With dead ends: 516 [2021-04-15 02:19:04,346 INFO L226 Difference]: Without dead ends: 515 [2021-04-15 02:19:04,346 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:19:04,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-04-15 02:19:04,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 415. [2021-04-15 02:19:04,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.845410628019324) internal successors, (1178), 414 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:04,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1178 transitions. [2021-04-15 02:19:04,352 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1178 transitions. Word has length 17 [2021-04-15 02:19:04,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:04,353 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 1178 transitions. [2021-04-15 02:19:04,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:04,353 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1178 transitions. [2021-04-15 02:19:04,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:19:04,353 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:04,353 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:04,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:04,554 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:04,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:04,554 INFO L82 PathProgramCache]: Analyzing trace with hash 866218562, now seen corresponding path program 57 times [2021-04-15 02:19:04,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:04,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703877168] [2021-04-15 02:19:04,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:04,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:04,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703877168] [2021-04-15 02:19:04,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424431612] [2021-04-15 02:19:04,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:04,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:19:04,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:04,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:19:04,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:04,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:04,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:19:04,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21392952] [2021-04-15 02:19:04,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:19:04,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:04,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:19:04,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:19:04,667 INFO L87 Difference]: Start difference. First operand 415 states and 1178 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:04,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:04,765 INFO L93 Difference]: Finished difference Result 503 states and 1301 transitions. [2021-04-15 02:19:04,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:19:04,766 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:19:04,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:04,767 INFO L225 Difference]: With dead ends: 503 [2021-04-15 02:19:04,768 INFO L226 Difference]: Without dead ends: 500 [2021-04-15 02:19:04,768 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:19:04,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-04-15 02:19:04,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 412. [2021-04-15 02:19:04,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.834549878345499) internal successors, (1165), 411 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:04,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1165 transitions. [2021-04-15 02:19:04,775 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1165 transitions. Word has length 17 [2021-04-15 02:19:04,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:04,775 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 1165 transitions. [2021-04-15 02:19:04,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:04,775 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1165 transitions. [2021-04-15 02:19:04,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:19:04,776 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:04,776 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:04,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-04-15 02:19:04,993 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:04,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:04,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1939343738, now seen corresponding path program 58 times [2021-04-15 02:19:04,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:04,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611332553] [2021-04-15 02:19:04,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:04,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:05,044 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:05,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611332553] [2021-04-15 02:19:05,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197584346] [2021-04-15 02:19:05,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:19:05,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:19:05,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:05,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:19:05,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:05,105 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:05,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:05,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-04-15 02:19:05,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104839290] [2021-04-15 02:19:05,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:19:05,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:05,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:19:05,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:19:05,106 INFO L87 Difference]: Start difference. First operand 412 states and 1165 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:05,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:05,223 INFO L93 Difference]: Finished difference Result 478 states and 1266 transitions. [2021-04-15 02:19:05,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:19:05,224 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:19:05,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:05,225 INFO L225 Difference]: With dead ends: 478 [2021-04-15 02:19:05,226 INFO L226 Difference]: Without dead ends: 474 [2021-04-15 02:19:05,226 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:19:05,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-04-15 02:19:05,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 412. [2021-04-15 02:19:05,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.8223844282238444) internal successors, (1160), 411 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:05,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1160 transitions. [2021-04-15 02:19:05,234 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1160 transitions. Word has length 17 [2021-04-15 02:19:05,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:05,234 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 1160 transitions. [2021-04-15 02:19:05,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:05,235 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1160 transitions. [2021-04-15 02:19:05,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:19:05,235 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:05,235 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:05,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:05,453 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:05,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:05,454 INFO L82 PathProgramCache]: Analyzing trace with hash -275493550, now seen corresponding path program 59 times [2021-04-15 02:19:05,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:05,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602999330] [2021-04-15 02:19:05,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:05,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:05,490 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:05,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602999330] [2021-04-15 02:19:05,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85760148] [2021-04-15 02:19:05,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:05,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:19:05,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:05,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:19:05,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:19:05,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:05,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-04-15 02:19:05,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687280117] [2021-04-15 02:19:05,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:19:05,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:05,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:19:05,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:19:05,546 INFO L87 Difference]: Start difference. First operand 412 states and 1160 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:05,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:05,591 INFO L93 Difference]: Finished difference Result 508 states and 1297 transitions. [2021-04-15 02:19:05,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:19:05,591 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:19:05,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:05,592 INFO L225 Difference]: With dead ends: 508 [2021-04-15 02:19:05,592 INFO L226 Difference]: Without dead ends: 506 [2021-04-15 02:19:05,592 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:19:05,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-04-15 02:19:05,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 409. [2021-04-15 02:19:05,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.7965686274509802) internal successors, (1141), 408 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:05,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1141 transitions. [2021-04-15 02:19:05,600 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1141 transitions. Word has length 17 [2021-04-15 02:19:05,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:05,600 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 1141 transitions. [2021-04-15 02:19:05,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:05,600 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1141 transitions. [2021-04-15 02:19:05,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:19:05,601 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:05,601 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:05,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-04-15 02:19:05,823 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:05,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:05,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1114392848, now seen corresponding path program 60 times [2021-04-15 02:19:05,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:05,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018829788] [2021-04-15 02:19:05,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:05,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018829788] [2021-04-15 02:19:05,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144965570] [2021-04-15 02:19:05,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:05,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:19:05,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:05,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:19:05,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:05,933 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:05,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:05,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:19:05,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588727560] [2021-04-15 02:19:05,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:19:05,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:05,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:19:05,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:19:05,936 INFO L87 Difference]: Start difference. First operand 409 states and 1141 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:06,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:06,044 INFO L93 Difference]: Finished difference Result 497 states and 1266 transitions. [2021-04-15 02:19:06,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:19:06,044 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:19:06,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:06,045 INFO L225 Difference]: With dead ends: 497 [2021-04-15 02:19:06,045 INFO L226 Difference]: Without dead ends: 494 [2021-04-15 02:19:06,046 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:19:06,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-04-15 02:19:06,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 403. [2021-04-15 02:19:06,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.7761194029850746) internal successors, (1116), 402 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:06,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1116 transitions. [2021-04-15 02:19:06,056 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1116 transitions. Word has length 17 [2021-04-15 02:19:06,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:06,056 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 1116 transitions. [2021-04-15 02:19:06,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:06,056 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1116 transitions. [2021-04-15 02:19:06,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:19:06,057 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:06,057 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:06,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:06,273 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:06,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:06,273 INFO L82 PathProgramCache]: Analyzing trace with hash 375012148, now seen corresponding path program 61 times [2021-04-15 02:19:06,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:06,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840607014] [2021-04-15 02:19:06,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:06,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:06,328 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:06,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840607014] [2021-04-15 02:19:06,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808644051] [2021-04-15 02:19:06,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:06,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:06,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:19:06,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:06,392 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:06,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:06,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-04-15 02:19:06,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061516760] [2021-04-15 02:19:06,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:19:06,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:06,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:19:06,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:19:06,395 INFO L87 Difference]: Start difference. First operand 403 states and 1116 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:06,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:06,516 INFO L93 Difference]: Finished difference Result 496 states and 1249 transitions. [2021-04-15 02:19:06,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:19:06,517 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:19:06,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:06,518 INFO L225 Difference]: With dead ends: 496 [2021-04-15 02:19:06,518 INFO L226 Difference]: Without dead ends: 492 [2021-04-15 02:19:06,518 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:19:06,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-04-15 02:19:06,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 403. [2021-04-15 02:19:06,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.756218905472637) internal successors, (1108), 402 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:06,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1108 transitions. [2021-04-15 02:19:06,526 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1108 transitions. Word has length 17 [2021-04-15 02:19:06,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:06,526 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 1108 transitions. [2021-04-15 02:19:06,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:06,527 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1108 transitions. [2021-04-15 02:19:06,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:19:06,528 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:06,528 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:06,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-04-15 02:19:06,741 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:06,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:06,741 INFO L82 PathProgramCache]: Analyzing trace with hash -698073232, now seen corresponding path program 62 times [2021-04-15 02:19:06,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:06,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633421565] [2021-04-15 02:19:06,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:06,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:06,794 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:06,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633421565] [2021-04-15 02:19:06,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92914500] [2021-04-15 02:19:06,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:06,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:19:06,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:06,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:19:06,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:06,840 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:06,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:06,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-04-15 02:19:06,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056057487] [2021-04-15 02:19:06,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:19:06,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:06,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:19:06,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:19:06,842 INFO L87 Difference]: Start difference. First operand 403 states and 1108 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:06,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:06,943 INFO L93 Difference]: Finished difference Result 492 states and 1286 transitions. [2021-04-15 02:19:06,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:19:06,944 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:19:06,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:06,945 INFO L225 Difference]: With dead ends: 492 [2021-04-15 02:19:06,945 INFO L226 Difference]: Without dead ends: 486 [2021-04-15 02:19:06,945 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:19:06,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-04-15 02:19:06,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 404. [2021-04-15 02:19:06,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.7468982630272953) internal successors, (1107), 403 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:06,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1107 transitions. [2021-04-15 02:19:06,950 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1107 transitions. Word has length 17 [2021-04-15 02:19:06,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:06,950 INFO L480 AbstractCegarLoop]: Abstraction has 404 states and 1107 transitions. [2021-04-15 02:19:06,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:06,951 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1107 transitions. [2021-04-15 02:19:06,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:19:06,951 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:06,951 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:07,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:07,152 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:07,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:07,152 INFO L82 PathProgramCache]: Analyzing trace with hash -987391290, now seen corresponding path program 63 times [2021-04-15 02:19:07,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:07,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881136267] [2021-04-15 02:19:07,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:07,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:07,199 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:07,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881136267] [2021-04-15 02:19:07,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450161152] [2021-04-15 02:19:07,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:07,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:19:07,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:07,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:19:07,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:07,270 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:07,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:07,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:19:07,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549060697] [2021-04-15 02:19:07,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:19:07,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:07,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:19:07,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:19:07,271 INFO L87 Difference]: Start difference. First operand 404 states and 1107 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:07,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:07,334 INFO L93 Difference]: Finished difference Result 476 states and 1226 transitions. [2021-04-15 02:19:07,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:19:07,334 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:19:07,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:07,335 INFO L225 Difference]: With dead ends: 476 [2021-04-15 02:19:07,335 INFO L226 Difference]: Without dead ends: 476 [2021-04-15 02:19:07,335 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:19:07,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-04-15 02:19:07,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 405. [2021-04-15 02:19:07,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.7475247524752477) internal successors, (1110), 404 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:07,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1110 transitions. [2021-04-15 02:19:07,340 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1110 transitions. Word has length 17 [2021-04-15 02:19:07,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:07,340 INFO L480 AbstractCegarLoop]: Abstraction has 405 states and 1110 transitions. [2021-04-15 02:19:07,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:07,340 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1110 transitions. [2021-04-15 02:19:07,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:19:07,341 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:07,341 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:07,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-04-15 02:19:07,547 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:07,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:07,548 INFO L82 PathProgramCache]: Analyzing trace with hash 844347560, now seen corresponding path program 64 times [2021-04-15 02:19:07,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:07,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911883645] [2021-04-15 02:19:07,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:07,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:07,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911883645] [2021-04-15 02:19:07,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758823678] [2021-04-15 02:19:07,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:19:07,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:19:07,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:07,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:19:07,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:07,673 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:07,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:07,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-04-15 02:19:07,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468343258] [2021-04-15 02:19:07,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:19:07,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:07,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:19:07,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:19:07,674 INFO L87 Difference]: Start difference. First operand 405 states and 1110 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:07,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:07,766 INFO L93 Difference]: Finished difference Result 496 states and 1283 transitions. [2021-04-15 02:19:07,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:19:07,767 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:19:07,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:07,767 INFO L225 Difference]: With dead ends: 496 [2021-04-15 02:19:07,768 INFO L226 Difference]: Without dead ends: 490 [2021-04-15 02:19:07,768 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:19:07,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-04-15 02:19:07,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 405. [2021-04-15 02:19:07,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.735148514851485) internal successors, (1105), 404 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:07,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1105 transitions. [2021-04-15 02:19:07,772 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1105 transitions. Word has length 17 [2021-04-15 02:19:07,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:07,772 INFO L480 AbstractCegarLoop]: Abstraction has 405 states and 1105 transitions. [2021-04-15 02:19:07,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:07,772 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1105 transitions. [2021-04-15 02:19:07,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:19:07,773 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:07,773 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:07,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-04-15 02:19:07,974 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:07,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:07,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1544905116, now seen corresponding path program 65 times [2021-04-15 02:19:07,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:07,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033083309] [2021-04-15 02:19:07,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:08,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033083309] [2021-04-15 02:19:08,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63666805] [2021-04-15 02:19:08,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:19:08,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:19:08,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:08,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:19:08,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:08,086 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:19:08,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:08,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-04-15 02:19:08,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280002703] [2021-04-15 02:19:08,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:19:08,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:08,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:19:08,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:19:08,087 INFO L87 Difference]: Start difference. First operand 405 states and 1105 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:08,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:08,150 INFO L93 Difference]: Finished difference Result 538 states and 1315 transitions. [2021-04-15 02:19:08,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:19:08,151 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:19:08,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:08,152 INFO L225 Difference]: With dead ends: 538 [2021-04-15 02:19:08,152 INFO L226 Difference]: Without dead ends: 538 [2021-04-15 02:19:08,152 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:19:08,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-04-15 02:19:08,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 410. [2021-04-15 02:19:08,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.743276283618582) internal successors, (1122), 409 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:08,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1122 transitions. [2021-04-15 02:19:08,160 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1122 transitions. Word has length 17 [2021-04-15 02:19:08,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:08,160 INFO L480 AbstractCegarLoop]: Abstraction has 410 states and 1122 transitions. [2021-04-15 02:19:08,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:08,160 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1122 transitions. [2021-04-15 02:19:08,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:19:08,161 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:08,161 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:08,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-04-15 02:19:08,361 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:08,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:08,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1911162882, now seen corresponding path program 66 times [2021-04-15 02:19:08,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:08,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565243480] [2021-04-15 02:19:08,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:08,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:08,410 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:08,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565243480] [2021-04-15 02:19:08,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314645582] [2021-04-15 02:19:08,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:08,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:19:08,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:08,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:19:08,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:08,460 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:08,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:08,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:19:08,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47496744] [2021-04-15 02:19:08,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:19:08,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:08,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:19:08,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:19:08,461 INFO L87 Difference]: Start difference. First operand 410 states and 1122 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:08,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:08,546 INFO L93 Difference]: Finished difference Result 512 states and 1266 transitions. [2021-04-15 02:19:08,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:19:08,547 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:19:08,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:08,548 INFO L225 Difference]: With dead ends: 512 [2021-04-15 02:19:08,548 INFO L226 Difference]: Without dead ends: 510 [2021-04-15 02:19:08,548 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:19:08,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-04-15 02:19:08,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 410. [2021-04-15 02:19:08,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.7310513447432765) internal successors, (1117), 409 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:08,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1117 transitions. [2021-04-15 02:19:08,553 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1117 transitions. Word has length 17 [2021-04-15 02:19:08,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:08,553 INFO L480 AbstractCegarLoop]: Abstraction has 410 states and 1117 transitions. [2021-04-15 02:19:08,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:08,553 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1117 transitions. [2021-04-15 02:19:08,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:19:08,554 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:08,554 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:08,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:08,766 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:08,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:08,766 INFO L82 PathProgramCache]: Analyzing trace with hash -894399418, now seen corresponding path program 67 times [2021-04-15 02:19:08,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:08,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325678212] [2021-04-15 02:19:08,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:08,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:08,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325678212] [2021-04-15 02:19:08,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296960477] [2021-04-15 02:19:08,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:08,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:08,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:19:08,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:08,879 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:19:08,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:08,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-04-15 02:19:08,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236441632] [2021-04-15 02:19:08,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:19:08,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:08,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:19:08,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:19:08,880 INFO L87 Difference]: Start difference. First operand 410 states and 1117 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:08,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:08,974 INFO L93 Difference]: Finished difference Result 518 states and 1269 transitions. [2021-04-15 02:19:08,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:19:08,975 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:19:08,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:08,976 INFO L225 Difference]: With dead ends: 518 [2021-04-15 02:19:08,976 INFO L226 Difference]: Without dead ends: 514 [2021-04-15 02:19:08,976 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:19:08,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-04-15 02:19:08,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 410. [2021-04-15 02:19:08,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.7163814180929093) internal successors, (1111), 409 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:08,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1111 transitions. [2021-04-15 02:19:08,981 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1111 transitions. Word has length 17 [2021-04-15 02:19:08,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:08,982 INFO L480 AbstractCegarLoop]: Abstraction has 410 states and 1111 transitions. [2021-04-15 02:19:08,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:08,982 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1111 transitions. [2021-04-15 02:19:08,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:19:08,982 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:08,982 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:09,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-04-15 02:19:09,183 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:09,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:09,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1967484798, now seen corresponding path program 68 times [2021-04-15 02:19:09,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:09,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127786664] [2021-04-15 02:19:09,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:09,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:09,237 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:09,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127786664] [2021-04-15 02:19:09,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475609784] [2021-04-15 02:19:09,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:09,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:19:09,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:09,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:19:09,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:09,311 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:09,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:09,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-04-15 02:19:09,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444476734] [2021-04-15 02:19:09,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:19:09,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:09,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:19:09,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:19:09,312 INFO L87 Difference]: Start difference. First operand 410 states and 1111 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:09,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:09,426 INFO L93 Difference]: Finished difference Result 523 states and 1270 transitions. [2021-04-15 02:19:09,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:19:09,426 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:19:09,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:09,427 INFO L225 Difference]: With dead ends: 523 [2021-04-15 02:19:09,427 INFO L226 Difference]: Without dead ends: 517 [2021-04-15 02:19:09,428 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:19:09,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-04-15 02:19:09,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 411. [2021-04-15 02:19:09,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.7) internal successors, (1107), 410 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:09,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1107 transitions. [2021-04-15 02:19:09,436 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1107 transitions. Word has length 17 [2021-04-15 02:19:09,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:09,436 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 1107 transitions. [2021-04-15 02:19:09,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:09,437 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1107 transitions. [2021-04-15 02:19:09,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:19:09,438 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:09,438 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:09,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-04-15 02:19:09,663 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:09,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:09,663 INFO L82 PathProgramCache]: Analyzing trace with hash -873393210, now seen corresponding path program 69 times [2021-04-15 02:19:09,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:09,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089248150] [2021-04-15 02:19:09,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:09,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:09,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089248150] [2021-04-15 02:19:09,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503090363] [2021-04-15 02:19:09,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:09,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:19:09,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:09,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:19:09,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:09,793 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:09,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:09,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:19:09,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17087030] [2021-04-15 02:19:09,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:19:09,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:09,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:19:09,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:19:09,795 INFO L87 Difference]: Start difference. First operand 411 states and 1107 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:09,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:09,909 INFO L93 Difference]: Finished difference Result 574 states and 1445 transitions. [2021-04-15 02:19:09,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:19:09,909 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:19:09,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:09,910 INFO L225 Difference]: With dead ends: 574 [2021-04-15 02:19:09,910 INFO L226 Difference]: Without dead ends: 566 [2021-04-15 02:19:09,910 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:19:09,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-04-15 02:19:09,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 420. [2021-04-15 02:19:09,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.6801909307875893) internal successors, (1123), 419 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:09,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1123 transitions. [2021-04-15 02:19:09,920 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1123 transitions. Word has length 17 [2021-04-15 02:19:09,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:09,920 INFO L480 AbstractCegarLoop]: Abstraction has 420 states and 1123 transitions. [2021-04-15 02:19:09,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:09,920 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1123 transitions. [2021-04-15 02:19:09,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:19:09,921 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:09,921 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:10,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-04-15 02:19:10,143 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:10,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:10,143 INFO L82 PathProgramCache]: Analyzing trace with hash -416986994, now seen corresponding path program 70 times [2021-04-15 02:19:10,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:10,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499565715] [2021-04-15 02:19:10,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:10,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:10,195 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:10,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499565715] [2021-04-15 02:19:10,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697097497] [2021-04-15 02:19:10,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:10,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:19:10,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:10,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:19:10,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:10,267 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:10,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:10,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-04-15 02:19:10,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955817176] [2021-04-15 02:19:10,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:19:10,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:10,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:19:10,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:19:10,268 INFO L87 Difference]: Start difference. First operand 420 states and 1123 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:10,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:10,366 INFO L93 Difference]: Finished difference Result 565 states and 1384 transitions. [2021-04-15 02:19:10,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:19:10,366 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:19:10,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:10,368 INFO L225 Difference]: With dead ends: 565 [2021-04-15 02:19:10,368 INFO L226 Difference]: Without dead ends: 565 [2021-04-15 02:19:10,368 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:19:10,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-04-15 02:19:10,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 444. [2021-04-15 02:19:10,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.724604966139955) internal successors, (1207), 443 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:10,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1207 transitions. [2021-04-15 02:19:10,374 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1207 transitions. Word has length 17 [2021-04-15 02:19:10,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:10,375 INFO L480 AbstractCegarLoop]: Abstraction has 444 states and 1207 transitions. [2021-04-15 02:19:10,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:10,375 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1207 transitions. [2021-04-15 02:19:10,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:19:10,375 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:10,375 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:10,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:10,589 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:10,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:10,589 INFO L82 PathProgramCache]: Analyzing trace with hash -302988914, now seen corresponding path program 71 times [2021-04-15 02:19:10,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:10,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448360885] [2021-04-15 02:19:10,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:10,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448360885] [2021-04-15 02:19:10,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353290171] [2021-04-15 02:19:10,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:10,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:19:10,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:10,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:19:10,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:10,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:10,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-04-15 02:19:10,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481010360] [2021-04-15 02:19:10,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:19:10,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:10,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:19:10,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:19:10,732 INFO L87 Difference]: Start difference. First operand 444 states and 1207 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:10,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:10,862 INFO L93 Difference]: Finished difference Result 566 states and 1444 transitions. [2021-04-15 02:19:10,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:19:10,863 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:19:10,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:10,864 INFO L225 Difference]: With dead ends: 566 [2021-04-15 02:19:10,864 INFO L226 Difference]: Without dead ends: 558 [2021-04-15 02:19:10,865 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:19:10,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-04-15 02:19:10,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 444. [2021-04-15 02:19:10,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.7200902934537248) internal successors, (1205), 443 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:10,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1205 transitions. [2021-04-15 02:19:10,878 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1205 transitions. Word has length 17 [2021-04-15 02:19:10,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:10,878 INFO L480 AbstractCegarLoop]: Abstraction has 444 states and 1205 transitions. [2021-04-15 02:19:10,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:10,879 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1205 transitions. [2021-04-15 02:19:10,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:19:10,880 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:10,880 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:11,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:11,107 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:11,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:11,108 INFO L82 PathProgramCache]: Analyzing trace with hash 2053009298, now seen corresponding path program 72 times [2021-04-15 02:19:11,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:11,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99909285] [2021-04-15 02:19:11,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:11,175 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:11,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99909285] [2021-04-15 02:19:11,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119879644] [2021-04-15 02:19:11,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:11,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:19:11,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:11,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:19:11,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:11,256 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:11,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:11,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2021-04-15 02:19:11,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358455660] [2021-04-15 02:19:11,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:19:11,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:11,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:19:11,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:19:11,257 INFO L87 Difference]: Start difference. First operand 444 states and 1205 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:11,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:11,343 INFO L93 Difference]: Finished difference Result 642 states and 1598 transitions. [2021-04-15 02:19:11,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:19:11,344 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:19:11,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:11,345 INFO L225 Difference]: With dead ends: 642 [2021-04-15 02:19:11,345 INFO L226 Difference]: Without dead ends: 642 [2021-04-15 02:19:11,346 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:19:11,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-04-15 02:19:11,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 497. [2021-04-15 02:19:11,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.788306451612903) internal successors, (1383), 496 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:11,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1383 transitions. [2021-04-15 02:19:11,355 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1383 transitions. Word has length 17 [2021-04-15 02:19:11,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:11,355 INFO L480 AbstractCegarLoop]: Abstraction has 497 states and 1383 transitions. [2021-04-15 02:19:11,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:11,355 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1383 transitions. [2021-04-15 02:19:11,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:19:11,356 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:11,356 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:11,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:11,581 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:11,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:11,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1214110000, now seen corresponding path program 73 times [2021-04-15 02:19:11,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:11,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682472906] [2021-04-15 02:19:11,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:11,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:11,639 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:11,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682472906] [2021-04-15 02:19:11,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200420571] [2021-04-15 02:19:11,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:11,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:11,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:19:11,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:11,712 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:19:11,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:11,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 11 [2021-04-15 02:19:11,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961342264] [2021-04-15 02:19:11,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:19:11,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:11,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:19:11,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:19:11,713 INFO L87 Difference]: Start difference. First operand 497 states and 1383 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:11,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:11,838 INFO L93 Difference]: Finished difference Result 618 states and 1566 transitions. [2021-04-15 02:19:11,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:19:11,838 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:19:11,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:11,840 INFO L225 Difference]: With dead ends: 618 [2021-04-15 02:19:11,840 INFO L226 Difference]: Without dead ends: 616 [2021-04-15 02:19:11,840 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:19:11,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-04-15 02:19:11,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 497. [2021-04-15 02:19:11,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.784274193548387) internal successors, (1381), 496 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:11,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1381 transitions. [2021-04-15 02:19:11,849 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1381 transitions. Word has length 17 [2021-04-15 02:19:11,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:11,850 INFO L480 AbstractCegarLoop]: Abstraction has 497 states and 1381 transitions. [2021-04-15 02:19:11,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:11,850 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1381 transitions. [2021-04-15 02:19:11,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:19:11,851 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:11,851 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:12,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-04-15 02:19:12,065 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:12,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:12,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1591452300, now seen corresponding path program 74 times [2021-04-15 02:19:12,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:12,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511570237] [2021-04-15 02:19:12,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:12,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:12,119 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:12,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511570237] [2021-04-15 02:19:12,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273279075] [2021-04-15 02:19:12,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:12,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:19:12,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:12,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:19:12,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:12,194 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:12,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:12,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2021-04-15 02:19:12,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180023280] [2021-04-15 02:19:12,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:19:12,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:12,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:19:12,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:19:12,196 INFO L87 Difference]: Start difference. First operand 497 states and 1381 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:12,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:12,316 INFO L93 Difference]: Finished difference Result 624 states and 1572 transitions. [2021-04-15 02:19:12,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:19:12,316 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:19:12,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:12,318 INFO L225 Difference]: With dead ends: 624 [2021-04-15 02:19:12,318 INFO L226 Difference]: Without dead ends: 620 [2021-04-15 02:19:12,319 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:19:12,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-04-15 02:19:12,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 502. [2021-04-15 02:19:12,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 2.7864271457085827) internal successors, (1396), 501 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:12,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1396 transitions. [2021-04-15 02:19:12,327 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1396 transitions. Word has length 17 [2021-04-15 02:19:12,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:12,327 INFO L480 AbstractCegarLoop]: Abstraction has 502 states and 1396 transitions. [2021-04-15 02:19:12,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:12,327 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1396 transitions. [2021-04-15 02:19:12,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:19:12,328 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:12,328 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:12,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-04-15 02:19:12,528 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:12,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:12,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1630429616, now seen corresponding path program 75 times [2021-04-15 02:19:12,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:12,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041359526] [2021-04-15 02:19:12,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:12,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:12,589 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:12,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041359526] [2021-04-15 02:19:12,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600077821] [2021-04-15 02:19:12,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:19:12,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:19:12,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:12,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:19:12,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:12,663 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:12,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:12,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-04-15 02:19:12,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643114343] [2021-04-15 02:19:12,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:19:12,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:12,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:19:12,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:19:12,664 INFO L87 Difference]: Start difference. First operand 502 states and 1396 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:12,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:12,764 INFO L93 Difference]: Finished difference Result 723 states and 1870 transitions. [2021-04-15 02:19:12,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:19:12,764 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:19:12,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:12,766 INFO L225 Difference]: With dead ends: 723 [2021-04-15 02:19:12,766 INFO L226 Difference]: Without dead ends: 717 [2021-04-15 02:19:12,766 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 103.8ms TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:19:12,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-04-15 02:19:12,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 502. [2021-04-15 02:19:12,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 2.7824351297405188) internal successors, (1394), 501 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:12,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1394 transitions. [2021-04-15 02:19:12,772 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1394 transitions. Word has length 17 [2021-04-15 02:19:12,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:12,772 INFO L480 AbstractCegarLoop]: Abstraction has 502 states and 1394 transitions. [2021-04-15 02:19:12,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:12,773 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1394 transitions. [2021-04-15 02:19:12,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:19:12,774 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:12,774 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:12,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-04-15 02:19:12,997 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:12,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:12,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1570446092, now seen corresponding path program 76 times [2021-04-15 02:19:12,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:12,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485096071] [2021-04-15 02:19:12,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:13,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485096071] [2021-04-15 02:19:13,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28787725] [2021-04-15 02:19:13,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:13,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:19:13,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:13,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:19:13,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:13,146 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:13,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:13,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-04-15 02:19:13,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608469650] [2021-04-15 02:19:13,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:19:13,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:13,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:19:13,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:19:13,147 INFO L87 Difference]: Start difference. First operand 502 states and 1394 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:13,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:13,270 INFO L93 Difference]: Finished difference Result 736 states and 1882 transitions. [2021-04-15 02:19:13,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:19:13,271 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:19:13,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:13,273 INFO L225 Difference]: With dead ends: 736 [2021-04-15 02:19:13,273 INFO L226 Difference]: Without dead ends: 728 [2021-04-15 02:19:13,273 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 137.2ms TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:19:13,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-04-15 02:19:13,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 506. [2021-04-15 02:19:13,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.78019801980198) internal successors, (1404), 505 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:13,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1404 transitions. [2021-04-15 02:19:13,281 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1404 transitions. Word has length 17 [2021-04-15 02:19:13,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:13,281 INFO L480 AbstractCegarLoop]: Abstraction has 506 states and 1404 transitions. [2021-04-15 02:19:13,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:13,281 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1404 transitions. [2021-04-15 02:19:13,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:19:13,282 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:13,282 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:13,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-04-15 02:19:13,495 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:13,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:13,495 INFO L82 PathProgramCache]: Analyzing trace with hash -2013345232, now seen corresponding path program 77 times [2021-04-15 02:19:13,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:13,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77731767] [2021-04-15 02:19:13,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:13,556 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:13,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77731767] [2021-04-15 02:19:13,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603232349] [2021-04-15 02:19:13,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:13,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:19:13,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:13,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:19:13,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:13,659 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:13,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:13,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-04-15 02:19:13,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989856479] [2021-04-15 02:19:13,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:19:13,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:13,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:19:13,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:19:13,661 INFO L87 Difference]: Start difference. First operand 506 states and 1404 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:13,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:13,784 INFO L93 Difference]: Finished difference Result 575 states and 1546 transitions. [2021-04-15 02:19:13,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:19:13,784 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:19:13,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:13,786 INFO L225 Difference]: With dead ends: 575 [2021-04-15 02:19:13,786 INFO L226 Difference]: Without dead ends: 570 [2021-04-15 02:19:13,786 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 163.0ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:19:13,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-04-15 02:19:13,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 506. [2021-04-15 02:19:13,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.778217821782178) internal successors, (1403), 505 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:13,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1403 transitions. [2021-04-15 02:19:13,795 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1403 transitions. Word has length 17 [2021-04-15 02:19:13,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:13,797 INFO L480 AbstractCegarLoop]: Abstraction has 506 states and 1403 transitions. [2021-04-15 02:19:13,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:13,797 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1403 transitions. [2021-04-15 02:19:13,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:19:13,798 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:13,798 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:14,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-04-15 02:19:14,013 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:14,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:14,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1740678897, now seen corresponding path program 78 times [2021-04-15 02:19:14,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:14,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227136838] [2021-04-15 02:19:14,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:14,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:14,055 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:14,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227136838] [2021-04-15 02:19:14,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705814237] [2021-04-15 02:19:14,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:14,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:19:14,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:14,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-15 02:19:14,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:14,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:19:14,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:19:14,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:19:14,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:19:14,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:19:14,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:19:14,436 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:14,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:14,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-04-15 02:19:14,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072150674] [2021-04-15 02:19:14,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:19:14,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:14,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:19:14,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:19:14,437 INFO L87 Difference]: Start difference. First operand 506 states and 1403 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:14,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:14,604 INFO L93 Difference]: Finished difference Result 610 states and 1596 transitions. [2021-04-15 02:19:14,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:19:14,605 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:19:14,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:14,606 INFO L225 Difference]: With dead ends: 610 [2021-04-15 02:19:14,606 INFO L226 Difference]: Without dead ends: 607 [2021-04-15 02:19:14,606 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 131.0ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:19:14,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-04-15 02:19:14,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 535. [2021-04-15 02:19:14,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 2.792134831460674) internal successors, (1491), 534 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:14,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 1491 transitions. [2021-04-15 02:19:14,617 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 1491 transitions. Word has length 18 [2021-04-15 02:19:14,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:14,617 INFO L480 AbstractCegarLoop]: Abstraction has 535 states and 1491 transitions. [2021-04-15 02:19:14,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:14,617 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 1491 transitions. [2021-04-15 02:19:14,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:19:14,618 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:14,618 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:14,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:14,836 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:14,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:14,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1612382321, now seen corresponding path program 79 times [2021-04-15 02:19:14,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:14,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64137762] [2021-04-15 02:19:14,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:14,882 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:14,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64137762] [2021-04-15 02:19:14,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966630351] [2021-04-15 02:19:14,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:14,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:14,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-15 02:19:14,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:15,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:19:15,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:19:15,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:19:15,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:19:15,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:19:15,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:19:15,329 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:15,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:15,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-04-15 02:19:15,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506030677] [2021-04-15 02:19:15,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:19:15,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:15,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:19:15,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:19:15,330 INFO L87 Difference]: Start difference. First operand 535 states and 1491 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:15,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:15,447 INFO L93 Difference]: Finished difference Result 674 states and 1772 transitions. [2021-04-15 02:19:15,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:19:15,448 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:19:15,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:15,452 INFO L225 Difference]: With dead ends: 674 [2021-04-15 02:19:15,453 INFO L226 Difference]: Without dead ends: 671 [2021-04-15 02:19:15,453 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 149.5ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:19:15,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-04-15 02:19:15,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 575. [2021-04-15 02:19:15,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 2.836236933797909) internal successors, (1628), 574 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:15,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1628 transitions. [2021-04-15 02:19:15,464 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1628 transitions. Word has length 18 [2021-04-15 02:19:15,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:15,464 INFO L480 AbstractCegarLoop]: Abstraction has 575 states and 1628 transitions. [2021-04-15 02:19:15,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:15,464 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1628 transitions. [2021-04-15 02:19:15,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:19:15,466 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:15,466 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:15,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:15,690 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:15,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:15,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1250571143, now seen corresponding path program 80 times [2021-04-15 02:19:15,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:15,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664063315] [2021-04-15 02:19:15,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:15,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:15,746 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:19:15,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664063315] [2021-04-15 02:19:15,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765487413] [2021-04-15 02:19:15,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:15,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:19:15,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:15,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-15 02:19:15,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:15,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:19:15,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:19:16,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:19:16,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:19:16,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:19:16,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:19:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:16,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:16,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-04-15 02:19:16,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270375628] [2021-04-15 02:19:16,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:19:16,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:16,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:19:16,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:19:16,264 INFO L87 Difference]: Start difference. First operand 575 states and 1628 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:16,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:16,391 INFO L93 Difference]: Finished difference Result 731 states and 1949 transitions. [2021-04-15 02:19:16,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:19:16,391 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:19:16,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:16,393 INFO L225 Difference]: With dead ends: 731 [2021-04-15 02:19:16,393 INFO L226 Difference]: Without dead ends: 728 [2021-04-15 02:19:16,393 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 151.8ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:19:16,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-04-15 02:19:16,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 616. [2021-04-15 02:19:16,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 2.8894308943089433) internal successors, (1777), 615 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:16,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 1777 transitions. [2021-04-15 02:19:16,403 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 1777 transitions. Word has length 18 [2021-04-15 02:19:16,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:16,404 INFO L480 AbstractCegarLoop]: Abstraction has 616 states and 1777 transitions. [2021-04-15 02:19:16,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:16,404 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1777 transitions. [2021-04-15 02:19:16,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:19:16,405 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:16,405 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:16,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-04-15 02:19:16,621 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:16,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:16,621 INFO L82 PathProgramCache]: Analyzing trace with hash -192184689, now seen corresponding path program 81 times [2021-04-15 02:19:16,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:16,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898936730] [2021-04-15 02:19:16,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:16,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:16,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898936730] [2021-04-15 02:19:16,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004485931] [2021-04-15 02:19:16,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:16,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:19:16,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:16,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-15 02:19:16,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:16,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:19:16,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:19:17,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:19:17,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:19:17,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:19:17,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:19:17,089 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:17,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:17,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-04-15 02:19:17,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957064699] [2021-04-15 02:19:17,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:19:17,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:17,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:19:17,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:19:17,091 INFO L87 Difference]: Start difference. First operand 616 states and 1777 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:17,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:17,273 INFO L93 Difference]: Finished difference Result 778 states and 2109 transitions. [2021-04-15 02:19:17,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:19:17,273 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:19:17,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:17,276 INFO L225 Difference]: With dead ends: 778 [2021-04-15 02:19:17,276 INFO L226 Difference]: Without dead ends: 775 [2021-04-15 02:19:17,276 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 139.3ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:19:17,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-04-15 02:19:17,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 659. [2021-04-15 02:19:17,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 2.9376899696048633) internal successors, (1933), 658 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:17,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1933 transitions. [2021-04-15 02:19:17,289 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1933 transitions. Word has length 18 [2021-04-15 02:19:17,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:17,289 INFO L480 AbstractCegarLoop]: Abstraction has 659 states and 1933 transitions. [2021-04-15 02:19:17,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:17,290 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1933 transitions. [2021-04-15 02:19:17,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:19:17,292 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:17,292 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:17,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-04-15 02:19:17,505 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:17,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:17,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1967942521, now seen corresponding path program 82 times [2021-04-15 02:19:17,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:17,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321181461] [2021-04-15 02:19:17,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:17,548 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:19:17,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321181461] [2021-04-15 02:19:17,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213371117] [2021-04-15 02:19:17,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:17,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:19:17,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:17,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-15 02:19:17,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:17,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:19:17,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:19:17,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:19:17,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:19:17,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:19:17,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:19:17,866 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:17,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:17,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-04-15 02:19:17,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007378052] [2021-04-15 02:19:17,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:19:17,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:17,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:19:17,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:19:17,868 INFO L87 Difference]: Start difference. First operand 659 states and 1933 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:18,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:18,003 INFO L93 Difference]: Finished difference Result 823 states and 2281 transitions. [2021-04-15 02:19:18,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:19:18,004 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:19:18,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:18,006 INFO L225 Difference]: With dead ends: 823 [2021-04-15 02:19:18,006 INFO L226 Difference]: Without dead ends: 820 [2021-04-15 02:19:18,006 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 136.3ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:19:18,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-04-15 02:19:18,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 714. [2021-04-15 02:19:18,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 2.985974754558205) internal successors, (2129), 713 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:18,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2129 transitions. [2021-04-15 02:19:18,020 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2129 transitions. Word has length 18 [2021-04-15 02:19:18,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:18,021 INFO L480 AbstractCegarLoop]: Abstraction has 714 states and 2129 transitions. [2021-04-15 02:19:18,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:18,021 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2129 transitions. [2021-04-15 02:19:18,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:19:18,022 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:18,022 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:18,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:18,237 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:18,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:18,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1181860465, now seen corresponding path program 83 times [2021-04-15 02:19:18,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:18,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118017146] [2021-04-15 02:19:18,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:18,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:18,282 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:18,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118017146] [2021-04-15 02:19:18,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914975370] [2021-04-15 02:19:18,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:18,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:19:18,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:18,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-15 02:19:18,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:18,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:19:18,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:19:18,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:19:18,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:19:18,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:19:18,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:19:18,639 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:18,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:18,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-04-15 02:19:18,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964183288] [2021-04-15 02:19:18,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:19:18,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:18,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:19:18,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:19:18,653 INFO L87 Difference]: Start difference. First operand 714 states and 2129 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:18,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:18,854 INFO L93 Difference]: Finished difference Result 908 states and 2540 transitions. [2021-04-15 02:19:18,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:19:18,855 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:19:18,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:18,857 INFO L225 Difference]: With dead ends: 908 [2021-04-15 02:19:18,857 INFO L226 Difference]: Without dead ends: 905 [2021-04-15 02:19:18,857 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 143.0ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:19:18,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-04-15 02:19:18,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 800. [2021-04-15 02:19:18,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 3.0) internal successors, (2397), 799 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:18,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2397 transitions. [2021-04-15 02:19:18,873 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2397 transitions. Word has length 18 [2021-04-15 02:19:18,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:18,873 INFO L480 AbstractCegarLoop]: Abstraction has 800 states and 2397 transitions. [2021-04-15 02:19:18,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:18,873 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2397 transitions. [2021-04-15 02:19:18,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:19:18,875 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:18,875 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:19,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-04-15 02:19:19,098 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:19,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:19,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1711846791, now seen corresponding path program 84 times [2021-04-15 02:19:19,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:19,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162367110] [2021-04-15 02:19:19,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:19,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:19,147 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:19,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162367110] [2021-04-15 02:19:19,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016142389] [2021-04-15 02:19:19,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:19,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:19:19,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:19,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-15 02:19:19,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:19,383 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:19:19,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:19:19,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:19:19,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:19:19,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:19:19,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:19:19,485 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:19,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:19,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-04-15 02:19:19,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786818231] [2021-04-15 02:19:19,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:19:19,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:19,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:19:19,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:19:19,486 INFO L87 Difference]: Start difference. First operand 800 states and 2397 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:19,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:19,622 INFO L93 Difference]: Finished difference Result 974 states and 2756 transitions. [2021-04-15 02:19:19,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:19:19,623 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:19:19,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:19,624 INFO L225 Difference]: With dead ends: 974 [2021-04-15 02:19:19,624 INFO L226 Difference]: Without dead ends: 971 [2021-04-15 02:19:19,624 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 157.7ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:19:19,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-04-15 02:19:19,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 872. [2021-04-15 02:19:19,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.0114810562571757) internal successors, (2623), 871 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:19,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2623 transitions. [2021-04-15 02:19:19,634 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2623 transitions. Word has length 18 [2021-04-15 02:19:19,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:19,634 INFO L480 AbstractCegarLoop]: Abstraction has 872 states and 2623 transitions. [2021-04-15 02:19:19,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:19,634 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2623 transitions. [2021-04-15 02:19:19,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:19,635 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:19,635 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:19,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-04-15 02:19:19,836 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:19,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:19,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1937782575, now seen corresponding path program 85 times [2021-04-15 02:19:19,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:19,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025240415] [2021-04-15 02:19:19,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:19,900 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:19,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025240415] [2021-04-15 02:19:19,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325573089] [2021-04-15 02:19:19,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:19,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:19,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:19,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:19,965 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:19,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:19,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:19:19,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880356092] [2021-04-15 02:19:19,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:19:19,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:19,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:19:19,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:19:19,966 INFO L87 Difference]: Start difference. First operand 872 states and 2623 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:20,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:20,163 INFO L93 Difference]: Finished difference Result 993 states and 2794 transitions. [2021-04-15 02:19:20,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:19:20,163 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:20,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:20,166 INFO L225 Difference]: With dead ends: 993 [2021-04-15 02:19:20,166 INFO L226 Difference]: Without dead ends: 993 [2021-04-15 02:19:20,166 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 159.0ms TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:19:20,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-04-15 02:19:20,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 868. [2021-04-15 02:19:20,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.0069204152249136) internal successors, (2607), 867 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:20,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2607 transitions. [2021-04-15 02:19:20,184 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2607 transitions. Word has length 19 [2021-04-15 02:19:20,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:20,185 INFO L480 AbstractCegarLoop]: Abstraction has 868 states and 2607 transitions. [2021-04-15 02:19:20,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:20,185 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2607 transitions. [2021-04-15 02:19:20,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:20,186 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:20,187 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:20,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-04-15 02:19:20,411 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:20,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:20,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1896600742, now seen corresponding path program 86 times [2021-04-15 02:19:20,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:20,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461829631] [2021-04-15 02:19:20,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:20,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:20,484 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:20,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461829631] [2021-04-15 02:19:20,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860923092] [2021-04-15 02:19:20,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:20,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:19:20,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:20,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:20,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:20,561 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:20,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:20,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:19:20,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128000838] [2021-04-15 02:19:20,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:19:20,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:20,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:19:20,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:19:20,562 INFO L87 Difference]: Start difference. First operand 868 states and 2607 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:20,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:20,769 INFO L93 Difference]: Finished difference Result 1076 states and 2933 transitions. [2021-04-15 02:19:20,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:19:20,769 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:20,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:20,771 INFO L225 Difference]: With dead ends: 1076 [2021-04-15 02:19:20,771 INFO L226 Difference]: Without dead ends: 1067 [2021-04-15 02:19:20,771 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 175.1ms TimeCoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:19:20,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-04-15 02:19:20,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 886. [2021-04-15 02:19:20,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 2.994350282485876) internal successors, (2650), 885 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:20,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 2650 transitions. [2021-04-15 02:19:20,784 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 2650 transitions. Word has length 19 [2021-04-15 02:19:20,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:20,784 INFO L480 AbstractCegarLoop]: Abstraction has 886 states and 2650 transitions. [2021-04-15 02:19:20,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:20,784 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 2650 transitions. [2021-04-15 02:19:20,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:20,800 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:20,800 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:21,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-04-15 02:19:21,000 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:21,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:21,001 INFO L82 PathProgramCache]: Analyzing trace with hash -483433455, now seen corresponding path program 87 times [2021-04-15 02:19:21,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:21,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027979954] [2021-04-15 02:19:21,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:21,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:21,052 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:21,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027979954] [2021-04-15 02:19:21,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661609645] [2021-04-15 02:19:21,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:21,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:19:21,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:21,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:21,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:21,109 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:21,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:21,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:19:21,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699663682] [2021-04-15 02:19:21,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:19:21,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:21,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:19:21,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:19:21,110 INFO L87 Difference]: Start difference. First operand 886 states and 2650 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:21,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:21,214 INFO L93 Difference]: Finished difference Result 917 states and 2693 transitions. [2021-04-15 02:19:21,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:19:21,214 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:21,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:21,216 INFO L225 Difference]: With dead ends: 917 [2021-04-15 02:19:21,216 INFO L226 Difference]: Without dead ends: 916 [2021-04-15 02:19:21,216 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:19:21,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2021-04-15 02:19:21,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 886. [2021-04-15 02:19:21,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 2.992090395480226) internal successors, (2648), 885 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:21,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 2648 transitions. [2021-04-15 02:19:21,231 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 2648 transitions. Word has length 19 [2021-04-15 02:19:21,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:21,231 INFO L480 AbstractCegarLoop]: Abstraction has 886 states and 2648 transitions. [2021-04-15 02:19:21,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:21,231 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 2648 transitions. [2021-04-15 02:19:21,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:21,233 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:21,233 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:21,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-04-15 02:19:21,457 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:21,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:21,457 INFO L82 PathProgramCache]: Analyzing trace with hash 433622898, now seen corresponding path program 88 times [2021-04-15 02:19:21,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:21,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464085770] [2021-04-15 02:19:21,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:21,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:21,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464085770] [2021-04-15 02:19:21,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832829184] [2021-04-15 02:19:21,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:21,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:19:21,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:21,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:21,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:21,581 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:21,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:21,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:19:21,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837963143] [2021-04-15 02:19:21,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:19:21,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:21,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:19:21,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:19:21,582 INFO L87 Difference]: Start difference. First operand 886 states and 2648 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:21,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:21,642 INFO L93 Difference]: Finished difference Result 1091 states and 2973 transitions. [2021-04-15 02:19:21,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:19:21,643 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:21,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:21,644 INFO L225 Difference]: With dead ends: 1091 [2021-04-15 02:19:21,644 INFO L226 Difference]: Without dead ends: 1091 [2021-04-15 02:19:21,645 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:19:21,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2021-04-15 02:19:21,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 869. [2021-04-15 02:19:21,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 2.975806451612903) internal successors, (2583), 868 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:21,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2583 transitions. [2021-04-15 02:19:21,661 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2583 transitions. Word has length 19 [2021-04-15 02:19:21,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:21,661 INFO L480 AbstractCegarLoop]: Abstraction has 869 states and 2583 transitions. [2021-04-15 02:19:21,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:21,661 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2583 transitions. [2021-04-15 02:19:21,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:21,663 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:21,663 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:21,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:21,885 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:21,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:21,886 INFO L82 PathProgramCache]: Analyzing trace with hash 634065319, now seen corresponding path program 89 times [2021-04-15 02:19:21,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:21,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118379219] [2021-04-15 02:19:21,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:21,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:21,957 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:21,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118379219] [2021-04-15 02:19:21,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445889919] [2021-04-15 02:19:21,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:21,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:19:21,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:21,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:21,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:22,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:22,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:19:22,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060522228] [2021-04-15 02:19:22,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:19:22,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:22,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:19:22,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:19:22,028 INFO L87 Difference]: Start difference. First operand 869 states and 2583 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:22,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:22,118 INFO L93 Difference]: Finished difference Result 1088 states and 2969 transitions. [2021-04-15 02:19:22,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:19:22,119 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:22,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:22,120 INFO L225 Difference]: With dead ends: 1088 [2021-04-15 02:19:22,120 INFO L226 Difference]: Without dead ends: 1088 [2021-04-15 02:19:22,120 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:19:22,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-04-15 02:19:22,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 899. [2021-04-15 02:19:22,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 2.9844097995545655) internal successors, (2680), 898 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:22,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2680 transitions. [2021-04-15 02:19:22,133 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2680 transitions. Word has length 19 [2021-04-15 02:19:22,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:22,133 INFO L480 AbstractCegarLoop]: Abstraction has 899 states and 2680 transitions. [2021-04-15 02:19:22,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:22,133 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2680 transitions. [2021-04-15 02:19:22,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:22,135 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:22,135 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:22,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2021-04-15 02:19:22,351 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:22,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:22,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1578827302, now seen corresponding path program 90 times [2021-04-15 02:19:22,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:22,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842640748] [2021-04-15 02:19:22,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:22,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:22,391 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:22,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842640748] [2021-04-15 02:19:22,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581475202] [2021-04-15 02:19:22,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:22,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:19:22,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:22,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:22,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:22,448 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:22,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:22,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:19:22,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849992682] [2021-04-15 02:19:22,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:19:22,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:22,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:19:22,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:19:22,449 INFO L87 Difference]: Start difference. First operand 899 states and 2680 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:22,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:22,551 INFO L93 Difference]: Finished difference Result 1083 states and 2957 transitions. [2021-04-15 02:19:22,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:19:22,552 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:22,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:22,553 INFO L225 Difference]: With dead ends: 1083 [2021-04-15 02:19:22,553 INFO L226 Difference]: Without dead ends: 1081 [2021-04-15 02:19:22,553 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:19:22,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-04-15 02:19:22,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 907. [2021-04-15 02:19:22,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 2.987858719646799) internal successors, (2707), 906 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:22,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 2707 transitions. [2021-04-15 02:19:22,567 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 2707 transitions. Word has length 19 [2021-04-15 02:19:22,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:22,567 INFO L480 AbstractCegarLoop]: Abstraction has 907 states and 2707 transitions. [2021-04-15 02:19:22,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:22,567 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 2707 transitions. [2021-04-15 02:19:22,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:22,569 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:22,569 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:22,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable546 [2021-04-15 02:19:22,790 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:22,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:22,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1915447287, now seen corresponding path program 91 times [2021-04-15 02:19:22,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:22,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965646005] [2021-04-15 02:19:22,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:22,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:22,836 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:22,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965646005] [2021-04-15 02:19:22,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255461905] [2021-04-15 02:19:22,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:22,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:22,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:22,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:22,891 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:22,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:22,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:19:22,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836168809] [2021-04-15 02:19:22,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:19:22,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:22,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:19:22,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:19:22,892 INFO L87 Difference]: Start difference. First operand 907 states and 2707 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:23,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:23,013 INFO L93 Difference]: Finished difference Result 1039 states and 2898 transitions. [2021-04-15 02:19:23,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:19:23,013 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:23,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:23,014 INFO L225 Difference]: With dead ends: 1039 [2021-04-15 02:19:23,014 INFO L226 Difference]: Without dead ends: 1037 [2021-04-15 02:19:23,015 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:19:23,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-04-15 02:19:23,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 884. [2021-04-15 02:19:23,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 2.9750849377123445) internal successors, (2627), 883 states have internal predecessors, (2627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:23,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2627 transitions. [2021-04-15 02:19:23,026 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2627 transitions. Word has length 19 [2021-04-15 02:19:23,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:23,026 INFO L480 AbstractCegarLoop]: Abstraction has 884 states and 2627 transitions. [2021-04-15 02:19:23,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:23,026 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2627 transitions. [2021-04-15 02:19:23,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:23,027 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:23,027 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:23,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-04-15 02:19:23,228 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:23,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:23,228 INFO L82 PathProgramCache]: Analyzing trace with hash -998390934, now seen corresponding path program 92 times [2021-04-15 02:19:23,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:23,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967776416] [2021-04-15 02:19:23,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:23,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:23,278 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:23,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967776416] [2021-04-15 02:19:23,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418263549] [2021-04-15 02:19:23,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:23,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:19:23,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:23,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:23,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:23,341 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:23,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:23,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:19:23,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95498003] [2021-04-15 02:19:23,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:19:23,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:23,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:19:23,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:19:23,342 INFO L87 Difference]: Start difference. First operand 884 states and 2627 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:23,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:23,399 INFO L93 Difference]: Finished difference Result 1108 states and 2970 transitions. [2021-04-15 02:19:23,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:19:23,400 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:23,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:23,401 INFO L225 Difference]: With dead ends: 1108 [2021-04-15 02:19:23,401 INFO L226 Difference]: Without dead ends: 1108 [2021-04-15 02:19:23,401 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:19:23,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-04-15 02:19:23,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 887. [2021-04-15 02:19:23,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 2.9729119638826185) internal successors, (2634), 886 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:23,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 2634 transitions. [2021-04-15 02:19:23,414 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 2634 transitions. Word has length 19 [2021-04-15 02:19:23,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:23,414 INFO L480 AbstractCegarLoop]: Abstraction has 887 states and 2634 transitions. [2021-04-15 02:19:23,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:23,416 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 2634 transitions. [2021-04-15 02:19:23,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:23,418 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:23,418 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:23,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable548 [2021-04-15 02:19:23,619 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:23,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:23,619 INFO L82 PathProgramCache]: Analyzing trace with hash -204833979, now seen corresponding path program 93 times [2021-04-15 02:19:23,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:23,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204212378] [2021-04-15 02:19:23,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:23,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:23,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204212378] [2021-04-15 02:19:23,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874228541] [2021-04-15 02:19:23,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:23,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:19:23,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:23,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:19:23,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 02:19:23,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:23,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-04-15 02:19:23,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301449156] [2021-04-15 02:19:23,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:19:23,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:23,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:19:23,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:19:23,836 INFO L87 Difference]: Start difference. First operand 887 states and 2634 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:24,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:24,441 INFO L93 Difference]: Finished difference Result 2007 states and 5647 transitions. [2021-04-15 02:19:24,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-04-15 02:19:24,441 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:24,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:24,444 INFO L225 Difference]: With dead ends: 2007 [2021-04-15 02:19:24,445 INFO L226 Difference]: Without dead ends: 1998 [2021-04-15 02:19:24,445 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 460.5ms TimeCoverageRelationStatistics Valid=356, Invalid=2836, Unknown=0, NotChecked=0, Total=3192 [2021-04-15 02:19:24,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-04-15 02:19:24,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1397. [2021-04-15 02:19:24,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 2.930515759312321) internal successors, (4091), 1396 states have internal predecessors, (4091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:24,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 4091 transitions. [2021-04-15 02:19:24,465 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 4091 transitions. Word has length 19 [2021-04-15 02:19:24,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:24,465 INFO L480 AbstractCegarLoop]: Abstraction has 1397 states and 4091 transitions. [2021-04-15 02:19:24,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:24,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 4091 transitions. [2021-04-15 02:19:24,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:24,467 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:24,467 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:24,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:24,668 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:24,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:24,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1567529028, now seen corresponding path program 94 times [2021-04-15 02:19:24,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:24,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102193260] [2021-04-15 02:19:24,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:24,723 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:24,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102193260] [2021-04-15 02:19:24,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378708147] [2021-04-15 02:19:24,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:24,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:19:24,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:24,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:24,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:24,798 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:24,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:24,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:19:24,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762132188] [2021-04-15 02:19:24,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:19:24,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:24,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:19:24,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:19:24,800 INFO L87 Difference]: Start difference. First operand 1397 states and 4091 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:24,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:24,873 INFO L93 Difference]: Finished difference Result 1816 states and 4866 transitions. [2021-04-15 02:19:24,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:19:24,873 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:24,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:24,875 INFO L225 Difference]: With dead ends: 1816 [2021-04-15 02:19:24,875 INFO L226 Difference]: Without dead ends: 1816 [2021-04-15 02:19:24,875 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:19:24,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2021-04-15 02:19:24,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1363. [2021-04-15 02:19:24,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 2.9140969162995596) internal successors, (3969), 1362 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:24,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 3969 transitions. [2021-04-15 02:19:24,892 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 3969 transitions. Word has length 19 [2021-04-15 02:19:24,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:24,892 INFO L480 AbstractCegarLoop]: Abstraction has 1363 states and 3969 transitions. [2021-04-15 02:19:24,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:24,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 3969 transitions. [2021-04-15 02:19:24,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:24,894 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:24,894 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:25,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:25,099 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:25,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:25,100 INFO L82 PathProgramCache]: Analyzing trace with hash 136071470, now seen corresponding path program 95 times [2021-04-15 02:19:25,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:25,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623022570] [2021-04-15 02:19:25,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:25,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:25,143 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:25,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623022570] [2021-04-15 02:19:25,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109220650] [2021-04-15 02:19:25,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:25,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:19:25,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:25,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:25,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:25,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:25,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:19:25,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809048797] [2021-04-15 02:19:25,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:19:25,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:25,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:19:25,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:19:25,197 INFO L87 Difference]: Start difference. First operand 1363 states and 3969 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:25,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:25,295 INFO L93 Difference]: Finished difference Result 1590 states and 4309 transitions. [2021-04-15 02:19:25,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:19:25,295 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:25,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:25,297 INFO L225 Difference]: With dead ends: 1590 [2021-04-15 02:19:25,297 INFO L226 Difference]: Without dead ends: 1588 [2021-04-15 02:19:25,297 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:19:25,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2021-04-15 02:19:25,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1376. [2021-04-15 02:19:25,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1375 states have (on average 2.9134545454545453) internal successors, (4006), 1375 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:25,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 4006 transitions. [2021-04-15 02:19:25,312 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 4006 transitions. Word has length 19 [2021-04-15 02:19:25,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:25,312 INFO L480 AbstractCegarLoop]: Abstraction has 1376 states and 4006 transitions. [2021-04-15 02:19:25,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:25,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 4006 transitions. [2021-04-15 02:19:25,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:25,314 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:25,314 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:25,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-04-15 02:19:25,517 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:25,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:25,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1853820530, now seen corresponding path program 96 times [2021-04-15 02:19:25,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:25,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569570350] [2021-04-15 02:19:25,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:25,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569570350] [2021-04-15 02:19:25,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484542969] [2021-04-15 02:19:25,573 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:25,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:19:25,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:25,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:25,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:25,631 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:25,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:25,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:19:25,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764048845] [2021-04-15 02:19:25,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:19:25,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:25,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:19:25,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:19:25,632 INFO L87 Difference]: Start difference. First operand 1376 states and 4006 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:25,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:25,687 INFO L93 Difference]: Finished difference Result 1582 states and 4263 transitions. [2021-04-15 02:19:25,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:19:25,687 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:25,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:25,689 INFO L225 Difference]: With dead ends: 1582 [2021-04-15 02:19:25,689 INFO L226 Difference]: Without dead ends: 1582 [2021-04-15 02:19:25,689 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:19:25,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-04-15 02:19:25,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1360. [2021-04-15 02:19:25,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 2.9021339220014717) internal successors, (3944), 1359 states have internal predecessors, (3944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:25,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 3944 transitions. [2021-04-15 02:19:25,708 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 3944 transitions. Word has length 19 [2021-04-15 02:19:25,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:25,708 INFO L480 AbstractCegarLoop]: Abstraction has 1360 states and 3944 transitions. [2021-04-15 02:19:25,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:25,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 3944 transitions. [2021-04-15 02:19:25,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:25,710 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:25,710 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:25,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-04-15 02:19:25,910 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:25,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:25,911 INFO L82 PathProgramCache]: Analyzing trace with hash 124773196, now seen corresponding path program 97 times [2021-04-15 02:19:25,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:25,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832779685] [2021-04-15 02:19:25,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:25,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:25,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832779685] [2021-04-15 02:19:25,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148711523] [2021-04-15 02:19:25,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:26,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:26,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:26,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:26,051 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:26,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:26,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:19:26,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728274713] [2021-04-15 02:19:26,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:19:26,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:26,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:19:26,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:19:26,052 INFO L87 Difference]: Start difference. First operand 1360 states and 3944 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:26,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:26,134 INFO L93 Difference]: Finished difference Result 1713 states and 4555 transitions. [2021-04-15 02:19:26,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:19:26,134 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:26,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:26,136 INFO L225 Difference]: With dead ends: 1713 [2021-04-15 02:19:26,136 INFO L226 Difference]: Without dead ends: 1713 [2021-04-15 02:19:26,136 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:19:26,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2021-04-15 02:19:26,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 1363. [2021-04-15 02:19:26,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 2.9023494860499266) internal successors, (3953), 1362 states have internal predecessors, (3953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:26,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 3953 transitions. [2021-04-15 02:19:26,154 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 3953 transitions. Word has length 19 [2021-04-15 02:19:26,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:26,154 INFO L480 AbstractCegarLoop]: Abstraction has 1363 states and 3953 transitions. [2021-04-15 02:19:26,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:26,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 3953 transitions. [2021-04-15 02:19:26,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:26,156 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:26,156 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:26,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable553,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:26,356 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:26,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:26,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1936086606, now seen corresponding path program 98 times [2021-04-15 02:19:26,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:26,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047132954] [2021-04-15 02:19:26,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:26,410 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:26,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047132954] [2021-04-15 02:19:26,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565477798] [2021-04-15 02:19:26,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:26,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:19:26,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:26,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:26,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:26,473 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:26,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:26,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:19:26,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761775579] [2021-04-15 02:19:26,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:19:26,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:26,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:19:26,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:19:26,474 INFO L87 Difference]: Start difference. First operand 1363 states and 3953 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:26,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:26,572 INFO L93 Difference]: Finished difference Result 2155 states and 5922 transitions. [2021-04-15 02:19:26,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:19:26,572 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:26,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:26,575 INFO L225 Difference]: With dead ends: 2155 [2021-04-15 02:19:26,575 INFO L226 Difference]: Without dead ends: 2155 [2021-04-15 02:19:26,575 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:19:26,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2021-04-15 02:19:26,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 1651. [2021-04-15 02:19:26,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 2.983030303030303) internal successors, (4922), 1650 states have internal predecessors, (4922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:26,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 4922 transitions. [2021-04-15 02:19:26,600 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 4922 transitions. Word has length 19 [2021-04-15 02:19:26,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:26,600 INFO L480 AbstractCegarLoop]: Abstraction has 1651 states and 4922 transitions. [2021-04-15 02:19:26,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:26,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 4922 transitions. [2021-04-15 02:19:26,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:26,602 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:26,602 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:26,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-04-15 02:19:26,803 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:26,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:26,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1320949180, now seen corresponding path program 99 times [2021-04-15 02:19:26,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:26,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413372907] [2021-04-15 02:19:26,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:19:26,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413372907] [2021-04-15 02:19:26,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783041759] [2021-04-15 02:19:26,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:26,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:19:26,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:26,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:26,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:19:26,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:26,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:19:26,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225918299] [2021-04-15 02:19:26,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:19:26,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:26,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:19:26,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:19:26,907 INFO L87 Difference]: Start difference. First operand 1651 states and 4922 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:27,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:27,018 INFO L93 Difference]: Finished difference Result 1877 states and 5329 transitions. [2021-04-15 02:19:27,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:19:27,018 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:27,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:27,021 INFO L225 Difference]: With dead ends: 1877 [2021-04-15 02:19:27,021 INFO L226 Difference]: Without dead ends: 1873 [2021-04-15 02:19:27,021 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:19:27,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2021-04-15 02:19:27,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1703. [2021-04-15 02:19:27,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 2.9958871915393654) internal successors, (5099), 1702 states have internal predecessors, (5099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:27,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 5099 transitions. [2021-04-15 02:19:27,050 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 5099 transitions. Word has length 19 [2021-04-15 02:19:27,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:27,050 INFO L480 AbstractCegarLoop]: Abstraction has 1703 states and 5099 transitions. [2021-04-15 02:19:27,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:27,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 5099 transitions. [2021-04-15 02:19:27,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:27,052 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:27,052 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:27,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable555,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:27,253 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:27,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:27,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1089469124, now seen corresponding path program 100 times [2021-04-15 02:19:27,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:27,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560902261] [2021-04-15 02:19:27,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:27,304 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:27,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560902261] [2021-04-15 02:19:27,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992357307] [2021-04-15 02:19:27,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:27,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:19:27,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:27,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:27,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:27,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:27,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:19:27,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610104543] [2021-04-15 02:19:27,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:19:27,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:27,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:19:27,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:19:27,360 INFO L87 Difference]: Start difference. First operand 1703 states and 5099 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:27,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:27,448 INFO L93 Difference]: Finished difference Result 2270 states and 6309 transitions. [2021-04-15 02:19:27,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:19:27,448 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:27,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:27,451 INFO L225 Difference]: With dead ends: 2270 [2021-04-15 02:19:27,451 INFO L226 Difference]: Without dead ends: 2270 [2021-04-15 02:19:27,451 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:19:27,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2021-04-15 02:19:27,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 1409. [2021-04-15 02:19:27,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 2.9396306818181817) internal successors, (4139), 1408 states have internal predecessors, (4139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:27,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4139 transitions. [2021-04-15 02:19:27,471 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4139 transitions. Word has length 19 [2021-04-15 02:19:27,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:27,471 INFO L480 AbstractCegarLoop]: Abstraction has 1409 states and 4139 transitions. [2021-04-15 02:19:27,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:27,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4139 transitions. [2021-04-15 02:19:27,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:27,473 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:27,473 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:27,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-04-15 02:19:27,674 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:27,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:27,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1639686362, now seen corresponding path program 101 times [2021-04-15 02:19:27,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:27,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111943736] [2021-04-15 02:19:27,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:27,717 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:27,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111943736] [2021-04-15 02:19:27,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507934149] [2021-04-15 02:19:27,718 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:27,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:19:27,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:27,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:27,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:27,771 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:27,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:27,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:19:27,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62650177] [2021-04-15 02:19:27,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:19:27,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:27,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:19:27,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:19:27,772 INFO L87 Difference]: Start difference. First operand 1409 states and 4139 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:27,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:27,885 INFO L93 Difference]: Finished difference Result 1616 states and 4431 transitions. [2021-04-15 02:19:27,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:19:27,885 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:27,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:27,887 INFO L225 Difference]: With dead ends: 1616 [2021-04-15 02:19:27,887 INFO L226 Difference]: Without dead ends: 1612 [2021-04-15 02:19:27,887 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:19:27,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-04-15 02:19:27,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1392. [2021-04-15 02:19:27,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 2.9281092739036665) internal successors, (4073), 1391 states have internal predecessors, (4073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:27,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4073 transitions. [2021-04-15 02:19:27,901 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4073 transitions. Word has length 19 [2021-04-15 02:19:27,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:27,901 INFO L480 AbstractCegarLoop]: Abstraction has 1392 states and 4073 transitions. [2021-04-15 02:19:27,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:27,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4073 transitions. [2021-04-15 02:19:27,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:27,903 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:27,903 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:28,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable557,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:28,105 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:28,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:28,105 INFO L82 PathProgramCache]: Analyzing trace with hash 78062698, now seen corresponding path program 102 times [2021-04-15 02:19:28,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:28,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804270492] [2021-04-15 02:19:28,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:28,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:28,148 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:28,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804270492] [2021-04-15 02:19:28,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837792674] [2021-04-15 02:19:28,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:28,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:19:28,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:28,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:28,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:28,235 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:28,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:28,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:19:28,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902883132] [2021-04-15 02:19:28,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:19:28,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:28,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:19:28,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:19:28,236 INFO L87 Difference]: Start difference. First operand 1392 states and 4073 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:28,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:28,295 INFO L93 Difference]: Finished difference Result 1671 states and 4517 transitions. [2021-04-15 02:19:28,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:19:28,295 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:28,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:28,297 INFO L225 Difference]: With dead ends: 1671 [2021-04-15 02:19:28,297 INFO L226 Difference]: Without dead ends: 1671 [2021-04-15 02:19:28,298 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:19:28,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2021-04-15 02:19:28,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1393. [2021-04-15 02:19:28,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 2.923132183908046) internal successors, (4069), 1392 states have internal predecessors, (4069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:28,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 4069 transitions. [2021-04-15 02:19:28,317 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 4069 transitions. Word has length 19 [2021-04-15 02:19:28,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:28,317 INFO L480 AbstractCegarLoop]: Abstraction has 1393 states and 4069 transitions. [2021-04-15 02:19:28,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:28,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 4069 transitions. [2021-04-15 02:19:28,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:28,318 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:28,318 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:28,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-04-15 02:19:28,521 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:28,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:28,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1650984636, now seen corresponding path program 103 times [2021-04-15 02:19:28,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:28,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566919206] [2021-04-15 02:19:28,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:28,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:28,572 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:28,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566919206] [2021-04-15 02:19:28,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107361154] [2021-04-15 02:19:28,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:19:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:28,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:28,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:28,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:28,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:19:28,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116654793] [2021-04-15 02:19:28,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:19:28,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:28,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:19:28,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:19:28,651 INFO L87 Difference]: Start difference. First operand 1393 states and 4069 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:28,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:28,724 INFO L93 Difference]: Finished difference Result 1578 states and 4284 transitions. [2021-04-15 02:19:28,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:19:28,725 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:28,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:28,727 INFO L225 Difference]: With dead ends: 1578 [2021-04-15 02:19:28,728 INFO L226 Difference]: Without dead ends: 1578 [2021-04-15 02:19:28,728 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:19:28,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-04-15 02:19:28,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1355. [2021-04-15 02:19:28,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 2.9084194977843425) internal successors, (3938), 1354 states have internal predecessors, (3938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:28,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 3938 transitions. [2021-04-15 02:19:28,754 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 3938 transitions. Word has length 19 [2021-04-15 02:19:28,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:28,754 INFO L480 AbstractCegarLoop]: Abstraction has 1355 states and 3938 transitions. [2021-04-15 02:19:28,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:28,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 3938 transitions. [2021-04-15 02:19:28,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:28,756 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:28,756 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:28,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable559 [2021-04-15 02:19:28,972 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:28,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:28,972 INFO L82 PathProgramCache]: Analyzing trace with hash 583122858, now seen corresponding path program 104 times [2021-04-15 02:19:28,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:28,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090652689] [2021-04-15 02:19:28,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:28,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:29,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090652689] [2021-04-15 02:19:29,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300979642] [2021-04-15 02:19:29,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:29,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:19:29,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:29,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:29,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:29,106 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:29,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:29,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:19:29,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030953567] [2021-04-15 02:19:29,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:19:29,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:29,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:19:29,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:19:29,107 INFO L87 Difference]: Start difference. First operand 1355 states and 3938 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:29,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:29,219 INFO L93 Difference]: Finished difference Result 1698 states and 4556 transitions. [2021-04-15 02:19:29,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:19:29,220 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:29,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:29,223 INFO L225 Difference]: With dead ends: 1698 [2021-04-15 02:19:29,224 INFO L226 Difference]: Without dead ends: 1698 [2021-04-15 02:19:29,224 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:19:29,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-04-15 02:19:29,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1299. [2021-04-15 02:19:29,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 2.8821263482280433) internal successors, (3741), 1298 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:29,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3741 transitions. [2021-04-15 02:19:29,253 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3741 transitions. Word has length 19 [2021-04-15 02:19:29,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:29,253 INFO L480 AbstractCegarLoop]: Abstraction has 1299 states and 3741 transitions. [2021-04-15 02:19:29,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:29,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3741 transitions. [2021-04-15 02:19:29,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:29,256 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:29,256 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:29,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:29,479 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:29,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:29,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1120978436, now seen corresponding path program 105 times [2021-04-15 02:19:29,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:29,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707907598] [2021-04-15 02:19:29,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:29,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:29,547 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:29,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707907598] [2021-04-15 02:19:29,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855621501] [2021-04-15 02:19:29,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:29,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:19:29,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:29,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:29,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:29,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:29,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:19:29,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345460102] [2021-04-15 02:19:29,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:19:29,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:29,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:19:29,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:19:29,648 INFO L87 Difference]: Start difference. First operand 1299 states and 3741 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:29,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:29,825 INFO L93 Difference]: Finished difference Result 2138 states and 5768 transitions. [2021-04-15 02:19:29,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:19:29,826 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:29,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:29,830 INFO L225 Difference]: With dead ends: 2138 [2021-04-15 02:19:29,831 INFO L226 Difference]: Without dead ends: 2138 [2021-04-15 02:19:29,831 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 157.1ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:19:29,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-04-15 02:19:29,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1510. [2021-04-15 02:19:29,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1509 states have (on average 2.952286282306163) internal successors, (4455), 1509 states have internal predecessors, (4455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:29,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 4455 transitions. [2021-04-15 02:19:29,868 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 4455 transitions. Word has length 19 [2021-04-15 02:19:29,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:29,868 INFO L480 AbstractCegarLoop]: Abstraction has 1510 states and 4455 transitions. [2021-04-15 02:19:29,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:29,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 4455 transitions. [2021-04-15 02:19:29,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:29,871 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:29,871 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:30,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:30,095 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:30,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:30,096 INFO L82 PathProgramCache]: Analyzing trace with hash 423925554, now seen corresponding path program 106 times [2021-04-15 02:19:30,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:30,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067842118] [2021-04-15 02:19:30,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:30,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:30,153 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:30,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067842118] [2021-04-15 02:19:30,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390210133] [2021-04-15 02:19:30,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:30,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:19:30,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:30,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:30,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:30,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:30,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:19:30,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171200160] [2021-04-15 02:19:30,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:19:30,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:30,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:19:30,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:19:30,213 INFO L87 Difference]: Start difference. First operand 1510 states and 4455 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:30,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:30,346 INFO L93 Difference]: Finished difference Result 1994 states and 5446 transitions. [2021-04-15 02:19:30,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:19:30,347 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:30,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:30,349 INFO L225 Difference]: With dead ends: 1994 [2021-04-15 02:19:30,349 INFO L226 Difference]: Without dead ends: 1994 [2021-04-15 02:19:30,349 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:19:30,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2021-04-15 02:19:30,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1216. [2021-04-15 02:19:30,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1215 states have (on average 2.891358024691358) internal successors, (3513), 1215 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:30,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 3513 transitions. [2021-04-15 02:19:30,367 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 3513 transitions. Word has length 19 [2021-04-15 02:19:30,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:30,367 INFO L480 AbstractCegarLoop]: Abstraction has 1216 states and 3513 transitions. [2021-04-15 02:19:30,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:30,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 3513 transitions. [2021-04-15 02:19:30,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:30,369 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:30,369 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:30,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-04-15 02:19:30,570 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:30,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:30,570 INFO L82 PathProgramCache]: Analyzing trace with hash -853604306, now seen corresponding path program 107 times [2021-04-15 02:19:30,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:30,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68246990] [2021-04-15 02:19:30,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:30,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:30,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68246990] [2021-04-15 02:19:30,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746409065] [2021-04-15 02:19:30,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:30,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:19:30,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:30,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:30,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:30,661 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:30,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:30,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:19:30,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858465974] [2021-04-15 02:19:30,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:19:30,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:30,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:19:30,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:19:30,661 INFO L87 Difference]: Start difference. First operand 1216 states and 3513 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:30,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:30,772 INFO L93 Difference]: Finished difference Result 1394 states and 3767 transitions. [2021-04-15 02:19:30,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:19:30,772 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:30,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:30,774 INFO L225 Difference]: With dead ends: 1394 [2021-04-15 02:19:30,774 INFO L226 Difference]: Without dead ends: 1390 [2021-04-15 02:19:30,774 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:19:30,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-04-15 02:19:30,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1183. [2021-04-15 02:19:30,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 2.8705583756345177) internal successors, (3393), 1182 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:30,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 3393 transitions. [2021-04-15 02:19:30,788 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 3393 transitions. Word has length 19 [2021-04-15 02:19:30,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:30,788 INFO L480 AbstractCegarLoop]: Abstraction has 1183 states and 3393 transitions. [2021-04-15 02:19:30,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:30,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 3393 transitions. [2021-04-15 02:19:30,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:30,789 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:30,789 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:30,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable563,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:30,990 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:30,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:30,990 INFO L82 PathProgramCache]: Analyzing trace with hash 864144754, now seen corresponding path program 108 times [2021-04-15 02:19:30,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:30,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209417118] [2021-04-15 02:19:30,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:31,042 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:31,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209417118] [2021-04-15 02:19:31,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086149278] [2021-04-15 02:19:31,042 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:31,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:19:31,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:31,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:31,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:31,131 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:31,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:31,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:19:31,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151470219] [2021-04-15 02:19:31,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:19:31,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:31,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:19:31,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:19:31,132 INFO L87 Difference]: Start difference. First operand 1183 states and 3393 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:31,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:31,192 INFO L93 Difference]: Finished difference Result 1453 states and 3839 transitions. [2021-04-15 02:19:31,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:19:31,192 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:31,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:31,194 INFO L225 Difference]: With dead ends: 1453 [2021-04-15 02:19:31,194 INFO L226 Difference]: Without dead ends: 1453 [2021-04-15 02:19:31,194 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:19:31,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2021-04-15 02:19:31,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 1189. [2021-04-15 02:19:31,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 2.8678451178451176) internal successors, (3407), 1188 states have internal predecessors, (3407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:31,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3407 transitions. [2021-04-15 02:19:31,212 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3407 transitions. Word has length 19 [2021-04-15 02:19:31,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:31,212 INFO L480 AbstractCegarLoop]: Abstraction has 1189 states and 3407 transitions. [2021-04-15 02:19:31,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:31,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3407 transitions. [2021-04-15 02:19:31,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:31,213 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:31,214 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:31,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-04-15 02:19:31,414 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:31,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:31,414 INFO L82 PathProgramCache]: Analyzing trace with hash -864902580, now seen corresponding path program 109 times [2021-04-15 02:19:31,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:31,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100454353] [2021-04-15 02:19:31,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:31,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:31,480 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:31,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100454353] [2021-04-15 02:19:31,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534021559] [2021-04-15 02:19:31,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:31,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:31,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:31,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:31,549 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:31,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:31,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:19:31,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198360391] [2021-04-15 02:19:31,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:19:31,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:31,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:19:31,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:19:31,550 INFO L87 Difference]: Start difference. First operand 1189 states and 3407 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:31,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:31,627 INFO L93 Difference]: Finished difference Result 1449 states and 3831 transitions. [2021-04-15 02:19:31,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:19:31,628 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:31,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:31,630 INFO L225 Difference]: With dead ends: 1449 [2021-04-15 02:19:31,630 INFO L226 Difference]: Without dead ends: 1449 [2021-04-15 02:19:31,630 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:19:31,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2021-04-15 02:19:31,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 1136. [2021-04-15 02:19:31,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 2.845814977973568) internal successors, (3230), 1135 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:31,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3230 transitions. [2021-04-15 02:19:31,648 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3230 transitions. Word has length 19 [2021-04-15 02:19:31,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:31,648 INFO L480 AbstractCegarLoop]: Abstraction has 1136 states and 3230 transitions. [2021-04-15 02:19:31,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:31,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3230 transitions. [2021-04-15 02:19:31,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:31,649 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:31,649 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:31,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-04-15 02:19:31,850 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:31,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:31,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1369204914, now seen corresponding path program 110 times [2021-04-15 02:19:31,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:31,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426824934] [2021-04-15 02:19:31,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:31,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:31,901 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:31,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426824934] [2021-04-15 02:19:31,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220534766] [2021-04-15 02:19:31,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:31,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:19:31,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:31,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:31,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:31,960 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:31,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:31,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:19:31,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701879978] [2021-04-15 02:19:31,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:19:31,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:31,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:19:31,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:19:31,962 INFO L87 Difference]: Start difference. First operand 1136 states and 3230 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:32,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:32,036 INFO L93 Difference]: Finished difference Result 1670 states and 4515 transitions. [2021-04-15 02:19:32,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:19:32,037 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:32,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:32,039 INFO L225 Difference]: With dead ends: 1670 [2021-04-15 02:19:32,040 INFO L226 Difference]: Without dead ends: 1670 [2021-04-15 02:19:32,040 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:19:32,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-04-15 02:19:32,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1470. [2021-04-15 02:19:32,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 2.888359428182437) internal successors, (4243), 1469 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:32,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 4243 transitions. [2021-04-15 02:19:32,070 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 4243 transitions. Word has length 19 [2021-04-15 02:19:32,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:32,070 INFO L480 AbstractCegarLoop]: Abstraction has 1470 states and 4243 transitions. [2021-04-15 02:19:32,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:32,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 4243 transitions. [2021-04-15 02:19:32,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:32,072 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:32,072 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:32,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable566 [2021-04-15 02:19:32,273 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:32,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:32,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1907060492, now seen corresponding path program 111 times [2021-04-15 02:19:32,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:32,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356281960] [2021-04-15 02:19:32,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:32,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:32,328 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:32,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356281960] [2021-04-15 02:19:32,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398374660] [2021-04-15 02:19:32,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:32,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:19:32,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:32,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:32,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:32,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:32,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:19:32,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717256733] [2021-04-15 02:19:32,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:19:32,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:32,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:19:32,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:19:32,390 INFO L87 Difference]: Start difference. First operand 1470 states and 4243 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:32,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:32,496 INFO L93 Difference]: Finished difference Result 1718 states and 4617 transitions. [2021-04-15 02:19:32,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:19:32,497 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:32,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:32,499 INFO L225 Difference]: With dead ends: 1718 [2021-04-15 02:19:32,499 INFO L226 Difference]: Without dead ends: 1718 [2021-04-15 02:19:32,500 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:19:32,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2021-04-15 02:19:32,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1404. [2021-04-15 02:19:32,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 2.879543834640057) internal successors, (4040), 1403 states have internal predecessors, (4040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:32,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 4040 transitions. [2021-04-15 02:19:32,520 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 4040 transitions. Word has length 19 [2021-04-15 02:19:32,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:32,520 INFO L480 AbstractCegarLoop]: Abstraction has 1404 states and 4040 transitions. [2021-04-15 02:19:32,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:32,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 4040 transitions. [2021-04-15 02:19:32,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:32,522 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:32,522 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:32,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable567,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:32,723 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:32,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:32,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1400714226, now seen corresponding path program 112 times [2021-04-15 02:19:32,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:32,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149750854] [2021-04-15 02:19:32,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:32,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:32,791 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:32,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149750854] [2021-04-15 02:19:32,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356680878] [2021-04-15 02:19:32,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:32,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:19:32,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:32,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:32,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:32,857 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:32,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:32,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:19:32,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896452519] [2021-04-15 02:19:32,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:19:32,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:32,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:19:32,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:19:32,858 INFO L87 Difference]: Start difference. First operand 1404 states and 4040 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:33,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:33,048 INFO L93 Difference]: Finished difference Result 1961 states and 5383 transitions. [2021-04-15 02:19:33,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:19:33,048 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:33,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:33,051 INFO L225 Difference]: With dead ends: 1961 [2021-04-15 02:19:33,051 INFO L226 Difference]: Without dead ends: 1961 [2021-04-15 02:19:33,052 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 164.3ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:19:33,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-04-15 02:19:33,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1643. [2021-04-15 02:19:33,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1642 states have (on average 2.933617539585871) internal successors, (4817), 1642 states have internal predecessors, (4817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:33,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 4817 transitions. [2021-04-15 02:19:33,078 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 4817 transitions. Word has length 19 [2021-04-15 02:19:33,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:33,078 INFO L480 AbstractCegarLoop]: Abstraction has 1643 states and 4817 transitions. [2021-04-15 02:19:33,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:33,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 4817 transitions. [2021-04-15 02:19:33,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:33,080 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:33,080 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:33,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-04-15 02:19:33,281 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:33,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:33,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1043037158, now seen corresponding path program 113 times [2021-04-15 02:19:33,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:33,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625409208] [2021-04-15 02:19:33,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:33,340 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:33,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625409208] [2021-04-15 02:19:33,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605450779] [2021-04-15 02:19:33,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:33,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:19:33,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:33,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:33,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:33,389 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:33,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:33,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:19:33,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201212546] [2021-04-15 02:19:33,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:19:33,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:33,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:19:33,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:19:33,390 INFO L87 Difference]: Start difference. First operand 1643 states and 4817 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:33,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:33,533 INFO L93 Difference]: Finished difference Result 1862 states and 5178 transitions. [2021-04-15 02:19:33,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:19:33,534 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:33,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:33,537 INFO L225 Difference]: With dead ends: 1862 [2021-04-15 02:19:33,537 INFO L226 Difference]: Without dead ends: 1856 [2021-04-15 02:19:33,537 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:19:33,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2021-04-15 02:19:33,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1674. [2021-04-15 02:19:33,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 2.9414225941422596) internal successors, (4921), 1673 states have internal predecessors, (4921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:33,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 4921 transitions. [2021-04-15 02:19:33,558 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 4921 transitions. Word has length 19 [2021-04-15 02:19:33,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:33,558 INFO L480 AbstractCegarLoop]: Abstraction has 1674 states and 4921 transitions. [2021-04-15 02:19:33,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:33,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 4921 transitions. [2021-04-15 02:19:33,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:33,560 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:33,560 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:33,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable569,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:33,761 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:33,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:33,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1871868906, now seen corresponding path program 114 times [2021-04-15 02:19:33,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:33,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942957185] [2021-04-15 02:19:33,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:33,814 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:33,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942957185] [2021-04-15 02:19:33,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556154944] [2021-04-15 02:19:33,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:33,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:19:33,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:33,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:33,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:33,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:33,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:19:33,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118087520] [2021-04-15 02:19:33,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:19:33,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:33,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:19:33,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:19:33,879 INFO L87 Difference]: Start difference. First operand 1674 states and 4921 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:33,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:33,953 INFO L93 Difference]: Finished difference Result 1907 states and 5367 transitions. [2021-04-15 02:19:33,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:19:33,953 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:33,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:33,957 INFO L225 Difference]: With dead ends: 1907 [2021-04-15 02:19:33,957 INFO L226 Difference]: Without dead ends: 1907 [2021-04-15 02:19:33,957 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:19:33,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2021-04-15 02:19:33,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1673. [2021-04-15 02:19:33,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1672 states have (on average 2.9318181818181817) internal successors, (4902), 1672 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:33,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 4902 transitions. [2021-04-15 02:19:33,991 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 4902 transitions. Word has length 19 [2021-04-15 02:19:33,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:33,991 INFO L480 AbstractCegarLoop]: Abstraction has 1673 states and 4902 transitions. [2021-04-15 02:19:33,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:33,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 4902 transitions. [2021-04-15 02:19:33,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:33,994 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:33,994 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:34,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:34,217 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:34,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:34,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1885242812, now seen corresponding path program 115 times [2021-04-15 02:19:34,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:34,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583212854] [2021-04-15 02:19:34,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:34,291 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:34,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583212854] [2021-04-15 02:19:34,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641237394] [2021-04-15 02:19:34,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:34,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:34,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:34,360 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:34,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:34,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:19:34,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828708008] [2021-04-15 02:19:34,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:19:34,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:34,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:19:34,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:19:34,361 INFO L87 Difference]: Start difference. First operand 1673 states and 4902 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:34,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:34,514 INFO L93 Difference]: Finished difference Result 1965 states and 5492 transitions. [2021-04-15 02:19:34,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:19:34,515 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:34,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:34,518 INFO L225 Difference]: With dead ends: 1965 [2021-04-15 02:19:34,518 INFO L226 Difference]: Without dead ends: 1965 [2021-04-15 02:19:34,518 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 119.9ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:19:34,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2021-04-15 02:19:34,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1412. [2021-04-15 02:19:34,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 2.888731396172927) internal successors, (4076), 1411 states have internal predecessors, (4076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:34,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 4076 transitions. [2021-04-15 02:19:34,552 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 4076 transitions. Word has length 19 [2021-04-15 02:19:34,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:34,552 INFO L480 AbstractCegarLoop]: Abstraction has 1412 states and 4076 transitions. [2021-04-15 02:19:34,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:34,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 4076 transitions. [2021-04-15 02:19:34,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:34,554 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:34,554 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:34,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:34,765 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:34,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:34,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1903378218, now seen corresponding path program 116 times [2021-04-15 02:19:34,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:34,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036978074] [2021-04-15 02:19:34,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:34,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:34,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036978074] [2021-04-15 02:19:34,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082192198] [2021-04-15 02:19:34,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:34,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:19:34,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:34,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:34,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:34,888 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:34,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:34,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:19:34,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230977703] [2021-04-15 02:19:34,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:19:34,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:34,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:19:34,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:19:34,889 INFO L87 Difference]: Start difference. First operand 1412 states and 4076 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:35,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:35,065 INFO L93 Difference]: Finished difference Result 1975 states and 5352 transitions. [2021-04-15 02:19:35,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:19:35,066 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:35,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:35,068 INFO L225 Difference]: With dead ends: 1975 [2021-04-15 02:19:35,069 INFO L226 Difference]: Without dead ends: 1975 [2021-04-15 02:19:35,069 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 150.2ms TimeCoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:19:35,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2021-04-15 02:19:35,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1385. [2021-04-15 02:19:35,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1385 states, 1384 states have (on average 2.9010115606936417) internal successors, (4015), 1384 states have internal predecessors, (4015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:35,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 4015 transitions. [2021-04-15 02:19:35,090 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 4015 transitions. Word has length 19 [2021-04-15 02:19:35,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:35,090 INFO L480 AbstractCegarLoop]: Abstraction has 1385 states and 4015 transitions. [2021-04-15 02:19:35,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:35,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 4015 transitions. [2021-04-15 02:19:35,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:35,092 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:35,092 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:35,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:35,294 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:35,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:35,294 INFO L82 PathProgramCache]: Analyzing trace with hash 2143162372, now seen corresponding path program 117 times [2021-04-15 02:19:35,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:35,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116780782] [2021-04-15 02:19:35,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:35,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:35,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116780782] [2021-04-15 02:19:35,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552643532] [2021-04-15 02:19:35,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:35,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:19:35,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:35,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:35,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:35,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:35,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:19:35,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087008745] [2021-04-15 02:19:35,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:19:35,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:35,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:19:35,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:19:35,421 INFO L87 Difference]: Start difference. First operand 1385 states and 4015 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:35,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:35,552 INFO L93 Difference]: Finished difference Result 1517 states and 4176 transitions. [2021-04-15 02:19:35,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:19:35,552 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:35,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:35,555 INFO L225 Difference]: With dead ends: 1517 [2021-04-15 02:19:35,555 INFO L226 Difference]: Without dead ends: 1513 [2021-04-15 02:19:35,555 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 86.0ms TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:19:35,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2021-04-15 02:19:35,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1380. [2021-04-15 02:19:35,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 2.897026831036983) internal successors, (3995), 1379 states have internal predecessors, (3995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:35,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 3995 transitions. [2021-04-15 02:19:35,589 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 3995 transitions. Word has length 19 [2021-04-15 02:19:35,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:35,589 INFO L480 AbstractCegarLoop]: Abstraction has 1380 states and 3995 transitions. [2021-04-15 02:19:35,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:35,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 3995 transitions. [2021-04-15 02:19:35,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:35,592 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:35,592 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:35,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2021-04-15 02:19:35,813 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:35,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:35,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1266911364, now seen corresponding path program 118 times [2021-04-15 02:19:35,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:35,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625563405] [2021-04-15 02:19:35,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:35,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:35,878 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:35,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625563405] [2021-04-15 02:19:35,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813520029] [2021-04-15 02:19:35,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:35,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:19:35,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:35,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:35,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:35,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:35,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:19:35,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979046735] [2021-04-15 02:19:35,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:19:35,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:35,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:19:35,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:19:35,948 INFO L87 Difference]: Start difference. First operand 1380 states and 3995 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:36,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:36,102 INFO L93 Difference]: Finished difference Result 1622 states and 4384 transitions. [2021-04-15 02:19:36,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:19:36,103 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:36,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:36,105 INFO L225 Difference]: With dead ends: 1622 [2021-04-15 02:19:36,105 INFO L226 Difference]: Without dead ends: 1622 [2021-04-15 02:19:36,105 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 146.3ms TimeCoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:19:36,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-04-15 02:19:36,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1221. [2021-04-15 02:19:36,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 2.8721311475409834) internal successors, (3504), 1220 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:36,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 3504 transitions. [2021-04-15 02:19:36,119 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 3504 transitions. Word has length 19 [2021-04-15 02:19:36,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:36,120 INFO L480 AbstractCegarLoop]: Abstraction has 1221 states and 3504 transitions. [2021-04-15 02:19:36,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:36,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 3504 transitions. [2021-04-15 02:19:36,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:36,121 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:36,121 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:36,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2021-04-15 02:19:36,333 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:36,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:36,333 INFO L82 PathProgramCache]: Analyzing trace with hash 2040102950, now seen corresponding path program 119 times [2021-04-15 02:19:36,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:36,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004391151] [2021-04-15 02:19:36,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:36,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:36,384 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:36,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004391151] [2021-04-15 02:19:36,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316999141] [2021-04-15 02:19:36,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:36,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:19:36,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:36,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:36,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:36,443 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:36,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:36,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:19:36,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391361459] [2021-04-15 02:19:36,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:19:36,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:36,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:19:36,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:19:36,444 INFO L87 Difference]: Start difference. First operand 1221 states and 3504 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:36,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:36,561 INFO L93 Difference]: Finished difference Result 1376 states and 3711 transitions. [2021-04-15 02:19:36,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:19:36,561 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:36,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:36,563 INFO L225 Difference]: With dead ends: 1376 [2021-04-15 02:19:36,563 INFO L226 Difference]: Without dead ends: 1372 [2021-04-15 02:19:36,563 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:19:36,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2021-04-15 02:19:36,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1231. [2021-04-15 02:19:36,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1230 states have (on average 2.873170731707317) internal successors, (3534), 1230 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:36,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 3534 transitions. [2021-04-15 02:19:36,589 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 3534 transitions. Word has length 19 [2021-04-15 02:19:36,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:36,589 INFO L480 AbstractCegarLoop]: Abstraction has 1231 states and 3534 transitions. [2021-04-15 02:19:36,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:36,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 3534 transitions. [2021-04-15 02:19:36,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:36,591 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:36,591 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:36,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-04-15 02:19:36,815 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:36,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:36,815 INFO L82 PathProgramCache]: Analyzing trace with hash -537115286, now seen corresponding path program 120 times [2021-04-15 02:19:36,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:36,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113446719] [2021-04-15 02:19:36,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:36,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:36,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113446719] [2021-04-15 02:19:36,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925339962] [2021-04-15 02:19:36,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:36,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:19:36,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:36,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:36,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:36,935 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:36,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:36,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:19:36,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529162414] [2021-04-15 02:19:36,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:19:36,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:36,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:19:36,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:19:36,935 INFO L87 Difference]: Start difference. First operand 1231 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:37,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:37,008 INFO L93 Difference]: Finished difference Result 1459 states and 3899 transitions. [2021-04-15 02:19:37,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:19:37,008 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:37,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:37,010 INFO L225 Difference]: With dead ends: 1459 [2021-04-15 02:19:37,010 INFO L226 Difference]: Without dead ends: 1459 [2021-04-15 02:19:37,010 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:19:37,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2021-04-15 02:19:37,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1232. [2021-04-15 02:19:37,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 2.8732737611697807) internal successors, (3537), 1231 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:37,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 3537 transitions. [2021-04-15 02:19:37,027 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 3537 transitions. Word has length 19 [2021-04-15 02:19:37,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:37,027 INFO L480 AbstractCegarLoop]: Abstraction has 1232 states and 3537 transitions. [2021-04-15 02:19:37,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:37,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 3537 transitions. [2021-04-15 02:19:37,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:37,029 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:37,029 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:37,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-04-15 02:19:37,241 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:37,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:37,242 INFO L82 PathProgramCache]: Analyzing trace with hash 2028804676, now seen corresponding path program 121 times [2021-04-15 02:19:37,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:37,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890100630] [2021-04-15 02:19:37,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:37,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:37,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890100630] [2021-04-15 02:19:37,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116054670] [2021-04-15 02:19:37,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:37,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:37,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:37,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:37,352 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:37,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:37,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:19:37,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452518084] [2021-04-15 02:19:37,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:19:37,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:37,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:19:37,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:19:37,353 INFO L87 Difference]: Start difference. First operand 1232 states and 3537 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:37,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:37,444 INFO L93 Difference]: Finished difference Result 1479 states and 3939 transitions. [2021-04-15 02:19:37,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:19:37,445 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:37,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:37,446 INFO L225 Difference]: With dead ends: 1479 [2021-04-15 02:19:37,447 INFO L226 Difference]: Without dead ends: 1479 [2021-04-15 02:19:37,447 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:19:37,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1479 states. [2021-04-15 02:19:37,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1479 to 1233. [2021-04-15 02:19:37,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 2.8733766233766236) internal successors, (3540), 1232 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:37,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 3540 transitions. [2021-04-15 02:19:37,462 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 3540 transitions. Word has length 19 [2021-04-15 02:19:37,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:37,462 INFO L480 AbstractCegarLoop]: Abstraction has 1233 states and 3540 transitions. [2021-04-15 02:19:37,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:37,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 3540 transitions. [2021-04-15 02:19:37,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:37,464 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:37,464 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:37,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:37,665 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:37,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:37,666 INFO L82 PathProgramCache]: Analyzing trace with hash -32055126, now seen corresponding path program 122 times [2021-04-15 02:19:37,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:37,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96432936] [2021-04-15 02:19:37,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:37,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:37,722 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:37,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96432936] [2021-04-15 02:19:37,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802207586] [2021-04-15 02:19:37,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:37,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:19:37,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:37,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:37,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:37,785 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:37,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:37,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:19:37,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935850706] [2021-04-15 02:19:37,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:19:37,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:37,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:19:37,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:19:37,786 INFO L87 Difference]: Start difference. First operand 1233 states and 3540 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:37,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:37,876 INFO L93 Difference]: Finished difference Result 1443 states and 3863 transitions. [2021-04-15 02:19:37,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:19:37,876 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:37,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:37,878 INFO L225 Difference]: With dead ends: 1443 [2021-04-15 02:19:37,878 INFO L226 Difference]: Without dead ends: 1443 [2021-04-15 02:19:37,878 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:19:37,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-04-15 02:19:37,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1226. [2021-04-15 02:19:37,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 2.874285714285714) internal successors, (3521), 1225 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:37,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 3521 transitions. [2021-04-15 02:19:37,896 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 3521 transitions. Word has length 19 [2021-04-15 02:19:37,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:37,896 INFO L480 AbstractCegarLoop]: Abstraction has 1226 states and 3521 transitions. [2021-04-15 02:19:37,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:37,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 3521 transitions. [2021-04-15 02:19:37,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:37,898 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:37,898 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:38,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable578 [2021-04-15 02:19:38,098 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:38,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:38,098 INFO L82 PathProgramCache]: Analyzing trace with hash 505800452, now seen corresponding path program 123 times [2021-04-15 02:19:38,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:38,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360105220] [2021-04-15 02:19:38,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:38,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:38,149 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:38,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360105220] [2021-04-15 02:19:38,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030204808] [2021-04-15 02:19:38,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:38,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:19:38,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:38,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:38,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:38,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:38,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:19:38,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24058151] [2021-04-15 02:19:38,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:19:38,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:38,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:19:38,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:19:38,235 INFO L87 Difference]: Start difference. First operand 1226 states and 3521 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:38,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:38,308 INFO L93 Difference]: Finished difference Result 1646 states and 4470 transitions. [2021-04-15 02:19:38,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:19:38,308 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:38,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:38,310 INFO L225 Difference]: With dead ends: 1646 [2021-04-15 02:19:38,310 INFO L226 Difference]: Without dead ends: 1646 [2021-04-15 02:19:38,310 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:19:38,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2021-04-15 02:19:38,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1435. [2021-04-15 02:19:38,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1434 states have (on average 2.8870292887029287) internal successors, (4140), 1434 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:38,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 4140 transitions. [2021-04-15 02:19:38,324 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 4140 transitions. Word has length 19 [2021-04-15 02:19:38,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:38,324 INFO L480 AbstractCegarLoop]: Abstraction has 1435 states and 4140 transitions. [2021-04-15 02:19:38,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:38,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 4140 transitions. [2021-04-15 02:19:38,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:38,325 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:38,325 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:38,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-04-15 02:19:38,540 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:38,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:38,540 INFO L82 PathProgramCache]: Analyzing trace with hash -545814, now seen corresponding path program 124 times [2021-04-15 02:19:38,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:38,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651348572] [2021-04-15 02:19:38,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:38,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:38,595 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:38,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651348572] [2021-04-15 02:19:38,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139738891] [2021-04-15 02:19:38,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:38,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:19:38,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:38,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:38,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:38,652 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:38,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:38,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:19:38,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46853879] [2021-04-15 02:19:38,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:19:38,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:38,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:19:38,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:19:38,654 INFO L87 Difference]: Start difference. First operand 1435 states and 4140 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:38,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:38,803 INFO L93 Difference]: Finished difference Result 1661 states and 4495 transitions. [2021-04-15 02:19:38,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:19:38,804 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:38,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:38,806 INFO L225 Difference]: With dead ends: 1661 [2021-04-15 02:19:38,806 INFO L226 Difference]: Without dead ends: 1661 [2021-04-15 02:19:38,806 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:19:38,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-04-15 02:19:38,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1435. [2021-04-15 02:19:38,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1434 states have (on average 2.8870292887029287) internal successors, (4140), 1434 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:38,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 4140 transitions. [2021-04-15 02:19:38,836 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 4140 transitions. Word has length 19 [2021-04-15 02:19:38,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:38,837 INFO L480 AbstractCegarLoop]: Abstraction has 1435 states and 4140 transitions. [2021-04-15 02:19:38,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:38,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 4140 transitions. [2021-04-15 02:19:38,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:38,839 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:38,840 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:39,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:39,065 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:39,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:39,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1482589124, now seen corresponding path program 125 times [2021-04-15 02:19:39,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:39,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675165562] [2021-04-15 02:19:39,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:39,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:39,128 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:39,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675165562] [2021-04-15 02:19:39,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892598769] [2021-04-15 02:19:39,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:39,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:19:39,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:39,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:39,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:39,193 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:39,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:39,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:19:39,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748937785] [2021-04-15 02:19:39,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:19:39,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:39,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:19:39,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:19:39,194 INFO L87 Difference]: Start difference. First operand 1435 states and 4140 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:39,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:39,420 INFO L93 Difference]: Finished difference Result 1853 states and 5030 transitions. [2021-04-15 02:19:39,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:19:39,421 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:39,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:39,423 INFO L225 Difference]: With dead ends: 1853 [2021-04-15 02:19:39,423 INFO L226 Difference]: Without dead ends: 1853 [2021-04-15 02:19:39,423 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 195.0ms TimeCoverageRelationStatistics Valid=293, Invalid=577, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:19:39,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2021-04-15 02:19:39,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1564. [2021-04-15 02:19:39,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1563 states have (on average 2.9021113243762) internal successors, (4536), 1563 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:39,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 4536 transitions. [2021-04-15 02:19:39,444 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 4536 transitions. Word has length 19 [2021-04-15 02:19:39,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:39,444 INFO L480 AbstractCegarLoop]: Abstraction has 1564 states and 4536 transitions. [2021-04-15 02:19:39,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:39,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 4536 transitions. [2021-04-15 02:19:39,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:39,448 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:39,448 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:39,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:39,661 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:39,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:39,661 INFO L82 PathProgramCache]: Analyzing trace with hash -554248274, now seen corresponding path program 126 times [2021-04-15 02:19:39,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:39,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665471126] [2021-04-15 02:19:39,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:39,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:39,736 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:39,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665471126] [2021-04-15 02:19:39,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750581294] [2021-04-15 02:19:39,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:39,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:19:39,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:39,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:39,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:39,798 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:39,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:39,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-04-15 02:19:39,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086965559] [2021-04-15 02:19:39,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:19:39,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:39,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:19:39,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:19:39,799 INFO L87 Difference]: Start difference. First operand 1564 states and 4536 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:39,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:39,997 INFO L93 Difference]: Finished difference Result 1749 states and 4790 transitions. [2021-04-15 02:19:39,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:19:39,998 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:39,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:40,000 INFO L225 Difference]: With dead ends: 1749 [2021-04-15 02:19:40,000 INFO L226 Difference]: Without dead ends: 1743 [2021-04-15 02:19:40,000 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 166.1ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:19:40,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2021-04-15 02:19:40,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1529. [2021-04-15 02:19:40,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 2.8841623036649215) internal successors, (4407), 1528 states have internal predecessors, (4407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:40,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 4407 transitions. [2021-04-15 02:19:40,024 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 4407 transitions. Word has length 19 [2021-04-15 02:19:40,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:40,025 INFO L480 AbstractCegarLoop]: Abstraction has 1529 states and 4407 transitions. [2021-04-15 02:19:40,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:40,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 4407 transitions. [2021-04-15 02:19:40,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:40,027 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:40,027 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:40,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:40,241 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:40,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:40,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1091484980, now seen corresponding path program 127 times [2021-04-15 02:19:40,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:40,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219559296] [2021-04-15 02:19:40,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:40,309 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:40,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219559296] [2021-04-15 02:19:40,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127551160] [2021-04-15 02:19:40,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:40,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:40,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:40,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:40,382 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:40,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:40,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-04-15 02:19:40,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999382706] [2021-04-15 02:19:40,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:19:40,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:40,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:19:40,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:19:40,383 INFO L87 Difference]: Start difference. First operand 1529 states and 4407 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:40,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:40,541 INFO L93 Difference]: Finished difference Result 1732 states and 4850 transitions. [2021-04-15 02:19:40,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:19:40,541 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:40,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:40,543 INFO L225 Difference]: With dead ends: 1732 [2021-04-15 02:19:40,543 INFO L226 Difference]: Without dead ends: 1732 [2021-04-15 02:19:40,543 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 159.4ms TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:19:40,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2021-04-15 02:19:40,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1596. [2021-04-15 02:19:40,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 1595 states have (on average 2.889655172413793) internal successors, (4609), 1595 states have internal predecessors, (4609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:40,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 4609 transitions. [2021-04-15 02:19:40,558 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 4609 transitions. Word has length 19 [2021-04-15 02:19:40,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:40,558 INFO L480 AbstractCegarLoop]: Abstraction has 1596 states and 4609 transitions. [2021-04-15 02:19:40,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:40,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 4609 transitions. [2021-04-15 02:19:40,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:40,560 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:40,560 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:40,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:40,760 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:40,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:40,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1597831246, now seen corresponding path program 128 times [2021-04-15 02:19:40,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:40,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976645967] [2021-04-15 02:19:40,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:40,825 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:40,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976645967] [2021-04-15 02:19:40,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37665106] [2021-04-15 02:19:40,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:40,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:19:40,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:40,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:40,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:40,900 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:40,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:40,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-04-15 02:19:40,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628879575] [2021-04-15 02:19:40,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:19:40,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:40,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:19:40,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:19:40,901 INFO L87 Difference]: Start difference. First operand 1596 states and 4609 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:41,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:41,166 INFO L93 Difference]: Finished difference Result 1746 states and 4863 transitions. [2021-04-15 02:19:41,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:19:41,166 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:41,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:41,169 INFO L225 Difference]: With dead ends: 1746 [2021-04-15 02:19:41,169 INFO L226 Difference]: Without dead ends: 1746 [2021-04-15 02:19:41,169 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 221.0ms TimeCoverageRelationStatistics Valid=331, Invalid=661, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:19:41,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2021-04-15 02:19:41,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1507. [2021-04-15 02:19:41,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1506 states have (on average 2.8771580345285526) internal successors, (4333), 1506 states have internal predecessors, (4333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:41,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 4333 transitions. [2021-04-15 02:19:41,191 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 4333 transitions. Word has length 19 [2021-04-15 02:19:41,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:41,191 INFO L480 AbstractCegarLoop]: Abstraction has 1507 states and 4333 transitions. [2021-04-15 02:19:41,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:41,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 4333 transitions. [2021-04-15 02:19:41,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:41,194 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:41,194 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:41,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable584 [2021-04-15 02:19:41,417 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:41,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:41,417 INFO L82 PathProgramCache]: Analyzing trace with hash -114696308, now seen corresponding path program 129 times [2021-04-15 02:19:41,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:41,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400468067] [2021-04-15 02:19:41,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:41,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:41,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400468067] [2021-04-15 02:19:41,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295476643] [2021-04-15 02:19:41,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:41,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:19:41,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:41,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:41,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:41,562 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:41,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:41,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-04-15 02:19:41,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352319346] [2021-04-15 02:19:41,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:19:41,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:41,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:19:41,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:19:41,563 INFO L87 Difference]: Start difference. First operand 1507 states and 4333 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:41,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:41,856 INFO L93 Difference]: Finished difference Result 1884 states and 5161 transitions. [2021-04-15 02:19:41,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:19:41,857 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:41,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:41,858 INFO L225 Difference]: With dead ends: 1884 [2021-04-15 02:19:41,859 INFO L226 Difference]: Without dead ends: 1884 [2021-04-15 02:19:41,859 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 260.6ms TimeCoverageRelationStatistics Valid=395, Invalid=795, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:19:41,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2021-04-15 02:19:41,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1484. [2021-04-15 02:19:41,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 2.8792987188132164) internal successors, (4270), 1483 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:41,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 4270 transitions. [2021-04-15 02:19:41,881 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 4270 transitions. Word has length 19 [2021-04-15 02:19:41,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:41,881 INFO L480 AbstractCegarLoop]: Abstraction has 1484 states and 4270 transitions. [2021-04-15 02:19:41,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:41,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 4270 transitions. [2021-04-15 02:19:41,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:41,883 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:41,883 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:42,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable585,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:42,104 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:42,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:42,104 INFO L82 PathProgramCache]: Analyzing trace with hash -2004726350, now seen corresponding path program 130 times [2021-04-15 02:19:42,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:42,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538191895] [2021-04-15 02:19:42,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:42,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538191895] [2021-04-15 02:19:42,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497855149] [2021-04-15 02:19:42,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:42,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:19:42,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:42,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:42,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:42,235 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:42,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:42,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-04-15 02:19:42,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080793633] [2021-04-15 02:19:42,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:19:42,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:42,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:19:42,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:19:42,236 INFO L87 Difference]: Start difference. First operand 1484 states and 4270 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:42,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:42,416 INFO L93 Difference]: Finished difference Result 1607 states and 4421 transitions. [2021-04-15 02:19:42,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:19:42,417 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:42,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:42,419 INFO L225 Difference]: With dead ends: 1607 [2021-04-15 02:19:42,419 INFO L226 Difference]: Without dead ends: 1603 [2021-04-15 02:19:42,419 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 145.0ms TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:19:42,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2021-04-15 02:19:42,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1484. [2021-04-15 02:19:42,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 2.8772757923128793) internal successors, (4267), 1483 states have internal predecessors, (4267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:42,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 4267 transitions. [2021-04-15 02:19:42,439 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 4267 transitions. Word has length 19 [2021-04-15 02:19:42,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:42,439 INFO L480 AbstractCegarLoop]: Abstraction has 1484 states and 4267 transitions. [2021-04-15 02:19:42,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:42,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 4267 transitions. [2021-04-15 02:19:42,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:42,441 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:42,441 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:42,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-04-15 02:19:42,666 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:42,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:42,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1629667698, now seen corresponding path program 131 times [2021-04-15 02:19:42,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:42,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163000789] [2021-04-15 02:19:42,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:42,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:42,757 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:42,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163000789] [2021-04-15 02:19:42,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167052411] [2021-04-15 02:19:42,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:42,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:19:42,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:42,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:42,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:42,839 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:42,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:42,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-04-15 02:19:42,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535589018] [2021-04-15 02:19:42,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:19:42,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:42,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:19:42,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:19:42,840 INFO L87 Difference]: Start difference. First operand 1484 states and 4267 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:43,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:43,100 INFO L93 Difference]: Finished difference Result 1883 states and 5198 transitions. [2021-04-15 02:19:43,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:19:43,100 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:43,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:43,103 INFO L225 Difference]: With dead ends: 1883 [2021-04-15 02:19:43,103 INFO L226 Difference]: Without dead ends: 1883 [2021-04-15 02:19:43,103 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 253.5ms TimeCoverageRelationStatistics Valid=331, Invalid=725, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:19:43,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2021-04-15 02:19:43,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1685. [2021-04-15 02:19:43,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1685 states, 1684 states have (on average 2.8966745843230406) internal successors, (4878), 1684 states have internal predecessors, (4878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:43,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1685 states to 1685 states and 4878 transitions. [2021-04-15 02:19:43,129 INFO L78 Accepts]: Start accepts. Automaton has 1685 states and 4878 transitions. Word has length 19 [2021-04-15 02:19:43,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:43,129 INFO L480 AbstractCegarLoop]: Abstraction has 1685 states and 4878 transitions. [2021-04-15 02:19:43,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:43,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1685 states and 4878 transitions. [2021-04-15 02:19:43,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:43,132 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:43,132 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:43,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-04-15 02:19:43,351 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:43,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:43,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1550714670, now seen corresponding path program 132 times [2021-04-15 02:19:43,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:43,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634104410] [2021-04-15 02:19:43,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:43,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:43,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634104410] [2021-04-15 02:19:43,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737530532] [2021-04-15 02:19:43,421 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:43,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:19:43,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:43,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:43,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:43,486 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:43,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:43,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 13 [2021-04-15 02:19:43,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988502935] [2021-04-15 02:19:43,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:19:43,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:43,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:19:43,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:19:43,487 INFO L87 Difference]: Start difference. First operand 1685 states and 4878 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:43,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:43,620 INFO L93 Difference]: Finished difference Result 1804 states and 5036 transitions. [2021-04-15 02:19:43,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:19:43,621 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:43,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:43,623 INFO L225 Difference]: With dead ends: 1804 [2021-04-15 02:19:43,623 INFO L226 Difference]: Without dead ends: 1802 [2021-04-15 02:19:43,623 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:19:43,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2021-04-15 02:19:43,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1697. [2021-04-15 02:19:43,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1696 states have (on average 2.8985849056603774) internal successors, (4916), 1696 states have internal predecessors, (4916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:43,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 4916 transitions. [2021-04-15 02:19:43,663 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 4916 transitions. Word has length 19 [2021-04-15 02:19:43,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:43,663 INFO L480 AbstractCegarLoop]: Abstraction has 1697 states and 4916 transitions. [2021-04-15 02:19:43,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:43,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 4916 transitions. [2021-04-15 02:19:43,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:43,665 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:43,665 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:43,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable588 [2021-04-15 02:19:43,866 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:43,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:43,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1026503566, now seen corresponding path program 133 times [2021-04-15 02:19:43,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:43,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35637402] [2021-04-15 02:19:43,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:43,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:43,933 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:43,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35637402] [2021-04-15 02:19:43,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117266442] [2021-04-15 02:19:43,933 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:43,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:43,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:43,992 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:43,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:43,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 13 [2021-04-15 02:19:43,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424710014] [2021-04-15 02:19:43,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:19:43,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:43,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:19:43,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:19:43,993 INFO L87 Difference]: Start difference. First operand 1697 states and 4916 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:44,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:44,116 INFO L93 Difference]: Finished difference Result 1866 states and 5178 transitions. [2021-04-15 02:19:44,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:19:44,116 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:44,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:44,119 INFO L225 Difference]: With dead ends: 1866 [2021-04-15 02:19:44,119 INFO L226 Difference]: Without dead ends: 1866 [2021-04-15 02:19:44,119 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:19:44,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-04-15 02:19:44,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1698. [2021-04-15 02:19:44,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1697 states have (on average 2.897466116676488) internal successors, (4917), 1697 states have internal predecessors, (4917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:44,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 4917 transitions. [2021-04-15 02:19:44,135 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 4917 transitions. Word has length 19 [2021-04-15 02:19:44,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:44,135 INFO L480 AbstractCegarLoop]: Abstraction has 1698 states and 4917 transitions. [2021-04-15 02:19:44,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:44,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 4917 transitions. [2021-04-15 02:19:44,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:44,136 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:44,136 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:44,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:44,337 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:44,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:44,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1539416396, now seen corresponding path program 134 times [2021-04-15 02:19:44,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:44,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312120996] [2021-04-15 02:19:44,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:44,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:44,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312120996] [2021-04-15 02:19:44,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257738860] [2021-04-15 02:19:44,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:44,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:19:44,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:44,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:44,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:44,477 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:44,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:44,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-04-15 02:19:44,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145821340] [2021-04-15 02:19:44,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:19:44,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:44,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:19:44,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:19:44,478 INFO L87 Difference]: Start difference. First operand 1698 states and 4917 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:44,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:44,656 INFO L93 Difference]: Finished difference Result 1913 states and 5283 transitions. [2021-04-15 02:19:44,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:19:44,657 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:44,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:44,659 INFO L225 Difference]: With dead ends: 1913 [2021-04-15 02:19:44,659 INFO L226 Difference]: Without dead ends: 1913 [2021-04-15 02:19:44,659 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 166.3ms TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:19:44,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-04-15 02:19:44,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1700. [2021-04-15 02:19:44,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1699 states have (on average 2.896409652736904) internal successors, (4921), 1699 states have internal predecessors, (4921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:44,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 4921 transitions. [2021-04-15 02:19:44,691 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 4921 transitions. Word has length 19 [2021-04-15 02:19:44,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:44,691 INFO L480 AbstractCegarLoop]: Abstraction has 1700 states and 4921 transitions. [2021-04-15 02:19:44,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:44,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 4921 transitions. [2021-04-15 02:19:44,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:44,693 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:44,693 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:44,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable590 [2021-04-15 02:19:44,894 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:44,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:44,895 INFO L82 PathProgramCache]: Analyzing trace with hash -521443406, now seen corresponding path program 135 times [2021-04-15 02:19:44,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:44,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418835737] [2021-04-15 02:19:44,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:44,976 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:44,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418835737] [2021-04-15 02:19:44,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44306910] [2021-04-15 02:19:44,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:44,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:19:44,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:44,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:44,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:45,051 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:45,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:45,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-04-15 02:19:45,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309936394] [2021-04-15 02:19:45,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:19:45,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:45,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:19:45,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:19:45,055 INFO L87 Difference]: Start difference. First operand 1700 states and 4921 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:45,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:45,270 INFO L93 Difference]: Finished difference Result 2111 states and 5864 transitions. [2021-04-15 02:19:45,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:19:45,271 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:45,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:45,273 INFO L225 Difference]: With dead ends: 2111 [2021-04-15 02:19:45,273 INFO L226 Difference]: Without dead ends: 2111 [2021-04-15 02:19:45,274 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 205.3ms TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:19:45,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2021-04-15 02:19:45,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 1895. [2021-04-15 02:19:45,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1895 states, 1894 states have (on average 2.9123548046462515) internal successors, (5516), 1894 states have internal predecessors, (5516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:45,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 5516 transitions. [2021-04-15 02:19:45,302 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 5516 transitions. Word has length 19 [2021-04-15 02:19:45,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:45,303 INFO L480 AbstractCegarLoop]: Abstraction has 1895 states and 5516 transitions. [2021-04-15 02:19:45,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:45,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 5516 transitions. [2021-04-15 02:19:45,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:45,305 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:45,305 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:45,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:45,505 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:45,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:45,506 INFO L82 PathProgramCache]: Analyzing trace with hash 16412172, now seen corresponding path program 136 times [2021-04-15 02:19:45,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:45,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7192676] [2021-04-15 02:19:45,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:45,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:45,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7192676] [2021-04-15 02:19:45,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33808224] [2021-04-15 02:19:45,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:45,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:19:45,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:45,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:45,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:45,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:45,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2021-04-15 02:19:45,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81854782] [2021-04-15 02:19:45,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:19:45,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:45,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:19:45,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:19:45,663 INFO L87 Difference]: Start difference. First operand 1895 states and 5516 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:45,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:45,873 INFO L93 Difference]: Finished difference Result 2071 states and 5772 transitions. [2021-04-15 02:19:45,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:19:45,873 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:45,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:45,875 INFO L225 Difference]: With dead ends: 2071 [2021-04-15 02:19:45,875 INFO L226 Difference]: Without dead ends: 2071 [2021-04-15 02:19:45,875 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 212.0ms TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:19:45,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-04-15 02:19:45,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1876. [2021-04-15 02:19:45,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 2.9082666666666666) internal successors, (5453), 1875 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:45,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 5453 transitions. [2021-04-15 02:19:45,898 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 5453 transitions. Word has length 19 [2021-04-15 02:19:45,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:45,899 INFO L480 AbstractCegarLoop]: Abstraction has 1876 states and 5453 transitions. [2021-04-15 02:19:45,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:45,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 5453 transitions. [2021-04-15 02:19:45,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:45,901 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:45,901 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:46,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:46,101 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:46,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:46,101 INFO L82 PathProgramCache]: Analyzing trace with hash -489934094, now seen corresponding path program 137 times [2021-04-15 02:19:46,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:46,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173551920] [2021-04-15 02:19:46,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:46,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:46,180 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:46,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173551920] [2021-04-15 02:19:46,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625249839] [2021-04-15 02:19:46,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:46,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:19:46,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:46,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:46,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:46,259 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:46,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:46,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2021-04-15 02:19:46,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120983765] [2021-04-15 02:19:46,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:19:46,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:46,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:19:46,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:19:46,260 INFO L87 Difference]: Start difference. First operand 1876 states and 5453 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:46,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:46,429 INFO L93 Difference]: Finished difference Result 2136 states and 6078 transitions. [2021-04-15 02:19:46,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:19:46,430 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:46,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:46,431 INFO L225 Difference]: With dead ends: 2136 [2021-04-15 02:19:46,431 INFO L226 Difference]: Without dead ends: 2136 [2021-04-15 02:19:46,432 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 191.9ms TimeCoverageRelationStatistics Valid=241, Invalid=571, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:19:46,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-04-15 02:19:46,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 2034. [2021-04-15 02:19:46,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 2.9188391539596656) internal successors, (5934), 2033 states have internal predecessors, (5934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:46,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 5934 transitions. [2021-04-15 02:19:46,455 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 5934 transitions. Word has length 19 [2021-04-15 02:19:46,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:46,455 INFO L480 AbstractCegarLoop]: Abstraction has 2034 states and 5934 transitions. [2021-04-15 02:19:46,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:46,455 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 5934 transitions. [2021-04-15 02:19:46,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:46,458 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:46,458 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:46,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:46,658 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:46,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:46,659 INFO L82 PathProgramCache]: Analyzing trace with hash 993200844, now seen corresponding path program 138 times [2021-04-15 02:19:46,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:46,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823173715] [2021-04-15 02:19:46,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:46,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:46,731 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:46,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823173715] [2021-04-15 02:19:46,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937306615] [2021-04-15 02:19:46,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:46,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:19:46,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:46,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:46,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:46,820 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:46,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:46,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-04-15 02:19:46,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264159754] [2021-04-15 02:19:46,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:19:46,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:46,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:19:46,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:19:46,821 INFO L87 Difference]: Start difference. First operand 2034 states and 5934 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:47,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:47,033 INFO L93 Difference]: Finished difference Result 2171 states and 6166 transitions. [2021-04-15 02:19:47,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:19:47,034 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:47,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:47,036 INFO L225 Difference]: With dead ends: 2171 [2021-04-15 02:19:47,036 INFO L226 Difference]: Without dead ends: 2171 [2021-04-15 02:19:47,037 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 224.4ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:19:47,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-04-15 02:19:47,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2028. [2021-04-15 02:19:47,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.9181055747409967) internal successors, (5915), 2027 states have internal predecessors, (5915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:47,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5915 transitions. [2021-04-15 02:19:47,061 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5915 transitions. Word has length 19 [2021-04-15 02:19:47,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:47,061 INFO L480 AbstractCegarLoop]: Abstraction has 2028 states and 5915 transitions. [2021-04-15 02:19:47,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:47,061 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5915 transitions. [2021-04-15 02:19:47,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:19:47,063 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:47,063 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:47,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:47,264 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:47,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:47,264 INFO L82 PathProgramCache]: Analyzing trace with hash -274256334, now seen corresponding path program 139 times [2021-04-15 02:19:47,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:47,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573147821] [2021-04-15 02:19:47,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:47,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:47,353 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:47,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573147821] [2021-04-15 02:19:47,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39597458] [2021-04-15 02:19:47,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:47,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:47,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:47,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:47,446 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:47,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:47,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-04-15 02:19:47,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644868769] [2021-04-15 02:19:47,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:19:47,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:47,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:19:47,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:19:47,447 INFO L87 Difference]: Start difference. First operand 2028 states and 5915 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:47,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:47,774 INFO L93 Difference]: Finished difference Result 2447 states and 6973 transitions. [2021-04-15 02:19:47,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:19:47,774 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:19:47,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:47,777 INFO L225 Difference]: With dead ends: 2447 [2021-04-15 02:19:47,777 INFO L226 Difference]: Without dead ends: 2447 [2021-04-15 02:19:47,778 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 321.3ms TimeCoverageRelationStatistics Valid=495, Invalid=1145, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 02:19:47,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-04-15 02:19:47,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 2072. [2021-04-15 02:19:47,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 2.920328343795268) internal successors, (6048), 2071 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:47,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 6048 transitions. [2021-04-15 02:19:47,814 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 6048 transitions. Word has length 19 [2021-04-15 02:19:47,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:47,814 INFO L480 AbstractCegarLoop]: Abstraction has 2072 states and 6048 transitions. [2021-04-15 02:19:47,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:47,814 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 6048 transitions. [2021-04-15 02:19:47,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:19:47,817 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:47,817 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:48,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable595,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:48,029 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:48,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:48,029 INFO L82 PathProgramCache]: Analyzing trace with hash 935559555, now seen corresponding path program 140 times [2021-04-15 02:19:48,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:48,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011420246] [2021-04-15 02:19:48,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:48,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:48,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011420246] [2021-04-15 02:19:48,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076214071] [2021-04-15 02:19:48,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:48,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:19:48,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:48,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:48,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:19:48,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:48,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-04-15 02:19:48,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371619210] [2021-04-15 02:19:48,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:19:48,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:48,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:19:48,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:19:48,133 INFO L87 Difference]: Start difference. First operand 2072 states and 6048 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:48,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:48,281 INFO L93 Difference]: Finished difference Result 2203 states and 6267 transitions. [2021-04-15 02:19:48,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:19:48,281 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:19:48,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:48,283 INFO L225 Difference]: With dead ends: 2203 [2021-04-15 02:19:48,293 INFO L226 Difference]: Without dead ends: 2199 [2021-04-15 02:19:48,293 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:19:48,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-04-15 02:19:48,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 2069. [2021-04-15 02:19:48,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 2068 states have (on average 2.9192456479690523) internal successors, (6037), 2068 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:48,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 6037 transitions. [2021-04-15 02:19:48,322 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 6037 transitions. Word has length 20 [2021-04-15 02:19:48,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:48,322 INFO L480 AbstractCegarLoop]: Abstraction has 2069 states and 6037 transitions. [2021-04-15 02:19:48,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:48,322 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 6037 transitions. [2021-04-15 02:19:48,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:19:48,324 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:48,324 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:48,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable596 [2021-04-15 02:19:48,545 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:48,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:48,545 INFO L82 PathProgramCache]: Analyzing trace with hash -221292409, now seen corresponding path program 141 times [2021-04-15 02:19:48,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:48,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415858343] [2021-04-15 02:19:48,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:48,590 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:48,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415858343] [2021-04-15 02:19:48,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448855840] [2021-04-15 02:19:48,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:48,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:19:48,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:48,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:19:48,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:48,657 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:19:48,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:48,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:19:48,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104667483] [2021-04-15 02:19:48,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:19:48,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:48,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:19:48,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:19:48,658 INFO L87 Difference]: Start difference. First operand 2069 states and 6037 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:48,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:48,760 INFO L93 Difference]: Finished difference Result 2256 states and 6332 transitions. [2021-04-15 02:19:48,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:19:48,761 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:19:48,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:48,765 INFO L225 Difference]: With dead ends: 2256 [2021-04-15 02:19:48,765 INFO L226 Difference]: Without dead ends: 2254 [2021-04-15 02:19:48,765 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:19:48,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-04-15 02:19:48,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 2079. [2021-04-15 02:19:48,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 2078 states have (on average 2.9181905678537055) internal successors, (6064), 2078 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:48,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 6064 transitions. [2021-04-15 02:19:48,799 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 6064 transitions. Word has length 20 [2021-04-15 02:19:48,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:48,801 INFO L480 AbstractCegarLoop]: Abstraction has 2079 states and 6064 transitions. [2021-04-15 02:19:48,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:48,801 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 6064 transitions. [2021-04-15 02:19:48,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:19:48,804 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:48,804 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:49,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-04-15 02:19:49,026 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:49,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:49,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1524162281, now seen corresponding path program 142 times [2021-04-15 02:19:49,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:49,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56686237] [2021-04-15 02:19:49,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:49,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:49,072 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:49,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56686237] [2021-04-15 02:19:49,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728935971] [2021-04-15 02:19:49,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:49,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:19:49,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:49,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:49,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:49,144 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:19:49,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:49,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-04-15 02:19:49,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114102337] [2021-04-15 02:19:49,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:19:49,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:49,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:19:49,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:19:49,145 INFO L87 Difference]: Start difference. First operand 2079 states and 6064 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:49,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:49,249 INFO L93 Difference]: Finished difference Result 2285 states and 6387 transitions. [2021-04-15 02:19:49,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:19:49,249 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:19:49,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:49,253 INFO L225 Difference]: With dead ends: 2285 [2021-04-15 02:19:49,253 INFO L226 Difference]: Without dead ends: 2284 [2021-04-15 02:19:49,253 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:19:49,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2021-04-15 02:19:49,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 2072. [2021-04-15 02:19:49,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 2.91405118300338) internal successors, (6035), 2071 states have internal predecessors, (6035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:49,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 6035 transitions. [2021-04-15 02:19:49,283 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 6035 transitions. Word has length 20 [2021-04-15 02:19:49,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:49,283 INFO L480 AbstractCegarLoop]: Abstraction has 2072 states and 6035 transitions. [2021-04-15 02:19:49,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:49,284 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 6035 transitions. [2021-04-15 02:19:49,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:19:49,286 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:49,286 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:49,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-04-15 02:19:49,486 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:49,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:49,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1060191707, now seen corresponding path program 143 times [2021-04-15 02:19:49,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:49,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512221566] [2021-04-15 02:19:49,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:49,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:49,543 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:49,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512221566] [2021-04-15 02:19:49,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566235492] [2021-04-15 02:19:49,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:49,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:19:49,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:49,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:19:49,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:49,601 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:49,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:49,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:19:49,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229369433] [2021-04-15 02:19:49,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:19:49,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:49,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:19:49,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:19:49,602 INFO L87 Difference]: Start difference. First operand 2072 states and 6035 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:49,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:49,750 INFO L93 Difference]: Finished difference Result 2223 states and 6241 transitions. [2021-04-15 02:19:49,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:19:49,750 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:19:49,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:49,753 INFO L225 Difference]: With dead ends: 2223 [2021-04-15 02:19:49,753 INFO L226 Difference]: Without dead ends: 2220 [2021-04-15 02:19:49,753 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:19:49,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2021-04-15 02:19:49,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 2065. [2021-04-15 02:19:49,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.9084302325581395) internal successors, (6003), 2064 states have internal predecessors, (6003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:49,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 6003 transitions. [2021-04-15 02:19:49,779 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 6003 transitions. Word has length 20 [2021-04-15 02:19:49,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:49,780 INFO L480 AbstractCegarLoop]: Abstraction has 2065 states and 6003 transitions. [2021-04-15 02:19:49,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:49,780 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 6003 transitions. [2021-04-15 02:19:49,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:19:49,782 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:49,782 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:49,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2021-04-15 02:19:49,983 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:49,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:49,983 INFO L82 PathProgramCache]: Analyzing trace with hash 429213289, now seen corresponding path program 144 times [2021-04-15 02:19:49,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:49,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059832036] [2021-04-15 02:19:49,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:50,045 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:50,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059832036] [2021-04-15 02:19:50,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805591656] [2021-04-15 02:19:50,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:50,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:19:50,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:50,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:19:50,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:50,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:50,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:19:50,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447510673] [2021-04-15 02:19:50,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:19:50,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:50,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:19:50,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:19:50,128 INFO L87 Difference]: Start difference. First operand 2065 states and 6003 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:50,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:50,296 INFO L93 Difference]: Finished difference Result 2220 states and 6216 transitions. [2021-04-15 02:19:50,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:19:50,296 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:19:50,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:50,299 INFO L225 Difference]: With dead ends: 2220 [2021-04-15 02:19:50,299 INFO L226 Difference]: Without dead ends: 2216 [2021-04-15 02:19:50,299 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:19:50,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2021-04-15 02:19:50,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 2065. [2021-04-15 02:19:50,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.9040697674418605) internal successors, (5994), 2064 states have internal predecessors, (5994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:50,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5994 transitions. [2021-04-15 02:19:50,327 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5994 transitions. Word has length 20 [2021-04-15 02:19:50,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:50,327 INFO L480 AbstractCegarLoop]: Abstraction has 2065 states and 5994 transitions. [2021-04-15 02:19:50,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:50,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5994 transitions. [2021-04-15 02:19:50,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:19:50,330 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:50,330 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:50,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable600,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:50,530 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:50,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:50,530 INFO L82 PathProgramCache]: Analyzing trace with hash -643872091, now seen corresponding path program 145 times [2021-04-15 02:19:50,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:50,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293160933] [2021-04-15 02:19:50,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:50,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:50,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293160933] [2021-04-15 02:19:50,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689903554] [2021-04-15 02:19:50,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:50,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:50,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:50,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:50,655 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:50,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:50,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-04-15 02:19:50,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496137268] [2021-04-15 02:19:50,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:19:50,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:50,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:19:50,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:19:50,656 INFO L87 Difference]: Start difference. First operand 2065 states and 5994 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:50,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:50,819 INFO L93 Difference]: Finished difference Result 2259 states and 6407 transitions. [2021-04-15 02:19:50,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:19:50,819 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:19:50,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:50,822 INFO L225 Difference]: With dead ends: 2259 [2021-04-15 02:19:50,822 INFO L226 Difference]: Without dead ends: 2253 [2021-04-15 02:19:50,823 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 125.6ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:19:50,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2021-04-15 02:19:50,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 2076. [2021-04-15 02:19:50,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 2075 states have (on average 2.9016867469879517) internal successors, (6021), 2075 states have internal predecessors, (6021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:50,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 6021 transitions. [2021-04-15 02:19:50,850 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 6021 transitions. Word has length 20 [2021-04-15 02:19:50,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:50,850 INFO L480 AbstractCegarLoop]: Abstraction has 2076 states and 6021 transitions. [2021-04-15 02:19:50,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:50,850 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 6021 transitions. [2021-04-15 02:19:50,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:19:50,853 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:50,853 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:51,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-04-15 02:19:51,053 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:51,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:51,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1340924973, now seen corresponding path program 146 times [2021-04-15 02:19:51,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:51,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382471996] [2021-04-15 02:19:51,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:51,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:51,124 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:51,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382471996] [2021-04-15 02:19:51,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745438363] [2021-04-15 02:19:51,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:19:51,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:19:51,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:51,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:51,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:51,191 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:51,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:51,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-04-15 02:19:51,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206892639] [2021-04-15 02:19:51,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:19:51,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:51,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:19:51,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:19:51,192 INFO L87 Difference]: Start difference. First operand 2076 states and 6021 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:51,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:51,382 INFO L93 Difference]: Finished difference Result 2223 states and 6260 transitions. [2021-04-15 02:19:51,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:19:51,383 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:19:51,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:51,386 INFO L225 Difference]: With dead ends: 2223 [2021-04-15 02:19:51,387 INFO L226 Difference]: Without dead ends: 2214 [2021-04-15 02:19:51,387 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=151, Invalid=311, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:19:51,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-04-15 02:19:51,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 2064. [2021-04-15 02:19:51,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 2.9015996122152203) internal successors, (5986), 2063 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:51,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 5986 transitions. [2021-04-15 02:19:51,424 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 5986 transitions. Word has length 20 [2021-04-15 02:19:51,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:51,424 INFO L480 AbstractCegarLoop]: Abstraction has 2064 states and 5986 transitions. [2021-04-15 02:19:51,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:51,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 5986 transitions. [2021-04-15 02:19:51,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:19:51,427 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:51,427 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:51,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable602,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:51,645 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:51,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:51,645 INFO L82 PathProgramCache]: Analyzing trace with hash 564789647, now seen corresponding path program 147 times [2021-04-15 02:19:51,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:51,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925995227] [2021-04-15 02:19:51,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:51,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:51,694 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:51,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925995227] [2021-04-15 02:19:51,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127753749] [2021-04-15 02:19:51,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:51,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:19:51,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:51,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:19:51,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:19:51,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:51,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:19:51,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542571335] [2021-04-15 02:19:51,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:19:51,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:51,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:19:51,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:19:51,758 INFO L87 Difference]: Start difference. First operand 2064 states and 5986 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:51,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:51,820 INFO L93 Difference]: Finished difference Result 2236 states and 6252 transitions. [2021-04-15 02:19:51,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:19:51,820 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:19:51,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:51,823 INFO L225 Difference]: With dead ends: 2236 [2021-04-15 02:19:51,823 INFO L226 Difference]: Without dead ends: 2236 [2021-04-15 02:19:51,823 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:19:51,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-04-15 02:19:51,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 2065. [2021-04-15 02:19:51,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.9001937984496124) internal successors, (5986), 2064 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:51,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5986 transitions. [2021-04-15 02:19:51,844 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5986 transitions. Word has length 20 [2021-04-15 02:19:51,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:51,844 INFO L480 AbstractCegarLoop]: Abstraction has 2065 states and 5986 transitions. [2021-04-15 02:19:51,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:51,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5986 transitions. [2021-04-15 02:19:51,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:19:51,846 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:51,846 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:52,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable603,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:52,046 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:52,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:52,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1984722959, now seen corresponding path program 148 times [2021-04-15 02:19:52,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:52,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777060658] [2021-04-15 02:19:52,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:52,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:52,120 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:52,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777060658] [2021-04-15 02:19:52,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294366188] [2021-04-15 02:19:52,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:19:52,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:19:52,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:52,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:52,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:52,200 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:19:52,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:52,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-04-15 02:19:52,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699736065] [2021-04-15 02:19:52,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:19:52,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:52,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:19:52,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:19:52,201 INFO L87 Difference]: Start difference. First operand 2065 states and 5986 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:52,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:52,300 INFO L93 Difference]: Finished difference Result 2263 states and 6281 transitions. [2021-04-15 02:19:52,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:19:52,300 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:19:52,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:52,304 INFO L225 Difference]: With dead ends: 2263 [2021-04-15 02:19:52,304 INFO L226 Difference]: Without dead ends: 2262 [2021-04-15 02:19:52,304 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:19:52,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-04-15 02:19:52,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2069. [2021-04-15 02:19:52,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 2068 states have (on average 2.897001934235977) internal successors, (5991), 2068 states have internal predecessors, (5991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:52,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 5991 transitions. [2021-04-15 02:19:52,336 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 5991 transitions. Word has length 20 [2021-04-15 02:19:52,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:52,336 INFO L480 AbstractCegarLoop]: Abstraction has 2069 states and 5991 transitions. [2021-04-15 02:19:52,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:52,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 5991 transitions. [2021-04-15 02:19:52,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:19:52,339 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:52,339 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:52,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable604 [2021-04-15 02:19:52,541 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:52,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:52,542 INFO L82 PathProgramCache]: Analyzing trace with hash -274109651, now seen corresponding path program 149 times [2021-04-15 02:19:52,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:52,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740850262] [2021-04-15 02:19:52,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:52,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:52,594 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:52,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740850262] [2021-04-15 02:19:52,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968885328] [2021-04-15 02:19:52,594 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:52,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:19:52,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:52,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:52,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:52,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:52,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-04-15 02:19:52,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372445967] [2021-04-15 02:19:52,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:19:52,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:52,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:19:52,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:19:52,665 INFO L87 Difference]: Start difference. First operand 2069 states and 5991 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:52,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:52,801 INFO L93 Difference]: Finished difference Result 2229 states and 6208 transitions. [2021-04-15 02:19:52,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:19:52,802 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:19:52,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:52,805 INFO L225 Difference]: With dead ends: 2229 [2021-04-15 02:19:52,805 INFO L226 Difference]: Without dead ends: 2225 [2021-04-15 02:19:52,805 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:19:52,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-04-15 02:19:52,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2054. [2021-04-15 02:19:52,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2053 states have (on average 2.8913784705309302) internal successors, (5936), 2053 states have internal predecessors, (5936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 5936 transitions. [2021-04-15 02:19:52,834 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 5936 transitions. Word has length 20 [2021-04-15 02:19:52,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:52,835 INFO L480 AbstractCegarLoop]: Abstraction has 2054 states and 5936 transitions. [2021-04-15 02:19:52,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:52,835 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 5936 transitions. [2021-04-15 02:19:52,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:19:52,837 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:52,837 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:53,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable605,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:53,038 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:53,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:53,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1215295345, now seen corresponding path program 150 times [2021-04-15 02:19:53,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:53,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786307376] [2021-04-15 02:19:53,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:53,101 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:53,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786307376] [2021-04-15 02:19:53,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889912003] [2021-04-15 02:19:53,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:53,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:19:53,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:53,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:19:53,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:53,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:53,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:19:53,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460777186] [2021-04-15 02:19:53,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:19:53,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:53,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:19:53,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:19:53,166 INFO L87 Difference]: Start difference. First operand 2054 states and 5936 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:53,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:53,323 INFO L93 Difference]: Finished difference Result 2217 states and 6160 transitions. [2021-04-15 02:19:53,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:19:53,323 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:19:53,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:53,326 INFO L225 Difference]: With dead ends: 2217 [2021-04-15 02:19:53,327 INFO L226 Difference]: Without dead ends: 2211 [2021-04-15 02:19:53,327 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 118.6ms TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:19:53,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-04-15 02:19:53,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 2046. [2021-04-15 02:19:53,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2046 states, 2045 states have (on average 2.8880195599022005) internal successors, (5906), 2045 states have internal predecessors, (5906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:53,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2046 states to 2046 states and 5906 transitions. [2021-04-15 02:19:53,356 INFO L78 Accepts]: Start accepts. Automaton has 2046 states and 5906 transitions. Word has length 20 [2021-04-15 02:19:53,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:53,356 INFO L480 AbstractCegarLoop]: Abstraction has 2046 states and 5906 transitions. [2021-04-15 02:19:53,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:53,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2046 states and 5906 transitions. [2021-04-15 02:19:53,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:19:53,358 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:53,358 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:53,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable606 [2021-04-15 02:19:53,559 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:53,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:53,559 INFO L82 PathProgramCache]: Analyzing trace with hash 142209965, now seen corresponding path program 151 times [2021-04-15 02:19:53,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:53,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306896782] [2021-04-15 02:19:53,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:53,618 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:53,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306896782] [2021-04-15 02:19:53,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782886007] [2021-04-15 02:19:53,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:53,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:53,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:53,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:53,677 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:53,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:53,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-04-15 02:19:53,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818578563] [2021-04-15 02:19:53,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:19:53,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:53,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:19:53,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:19:53,678 INFO L87 Difference]: Start difference. First operand 2046 states and 5906 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:53,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:53,842 INFO L93 Difference]: Finished difference Result 2213 states and 6136 transitions. [2021-04-15 02:19:53,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:19:53,843 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:19:53,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:53,846 INFO L225 Difference]: With dead ends: 2213 [2021-04-15 02:19:53,846 INFO L226 Difference]: Without dead ends: 2207 [2021-04-15 02:19:53,846 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:19:53,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-04-15 02:19:53,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 2047. [2021-04-15 02:19:53,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2047 states, 2046 states have (on average 2.8836754643206257) internal successors, (5900), 2046 states have internal predecessors, (5900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:53,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2047 states to 2047 states and 5900 transitions. [2021-04-15 02:19:53,879 INFO L78 Accepts]: Start accepts. Automaton has 2047 states and 5900 transitions. Word has length 20 [2021-04-15 02:19:53,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:53,879 INFO L480 AbstractCegarLoop]: Abstraction has 2047 states and 5900 transitions. [2021-04-15 02:19:53,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:53,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2047 states and 5900 transitions. [2021-04-15 02:19:53,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:19:53,881 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:53,882 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:54,082 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:54,082 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:54,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:54,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1236301553, now seen corresponding path program 152 times [2021-04-15 02:19:54,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:54,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645819780] [2021-04-15 02:19:54,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:54,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:54,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645819780] [2021-04-15 02:19:54,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840730972] [2021-04-15 02:19:54,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:54,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:19:54,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:54,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:54,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:54,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:54,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-04-15 02:19:54,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804208993] [2021-04-15 02:19:54,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:19:54,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:54,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:19:54,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:19:54,206 INFO L87 Difference]: Start difference. First operand 2047 states and 5900 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:54,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:54,380 INFO L93 Difference]: Finished difference Result 2421 states and 6711 transitions. [2021-04-15 02:19:54,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:19:54,381 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:19:54,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:54,384 INFO L225 Difference]: With dead ends: 2421 [2021-04-15 02:19:54,384 INFO L226 Difference]: Without dead ends: 2413 [2021-04-15 02:19:54,384 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:19:54,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2021-04-15 02:19:54,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 2084. [2021-04-15 02:19:54,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 2083 states have (on average 2.884301488238118) internal successors, (6008), 2083 states have internal predecessors, (6008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:54,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 6008 transitions. [2021-04-15 02:19:54,411 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 6008 transitions. Word has length 20 [2021-04-15 02:19:54,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:54,412 INFO L480 AbstractCegarLoop]: Abstraction has 2084 states and 6008 transitions. [2021-04-15 02:19:54,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:54,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 6008 transitions. [2021-04-15 02:19:54,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:19:54,414 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:54,414 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:54,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:54,614 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:54,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:54,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1102498691, now seen corresponding path program 153 times [2021-04-15 02:19:54,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:54,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102731994] [2021-04-15 02:19:54,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:54,682 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:54,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102731994] [2021-04-15 02:19:54,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626785107] [2021-04-15 02:19:54,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:54,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:19:54,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:54,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:19:54,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:54,743 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:54,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:54,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:19:54,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523310477] [2021-04-15 02:19:54,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:19:54,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:54,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:19:54,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:19:54,744 INFO L87 Difference]: Start difference. First operand 2084 states and 6008 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:54,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:54,883 INFO L93 Difference]: Finished difference Result 2248 states and 6298 transitions. [2021-04-15 02:19:54,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:19:54,883 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:19:54,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:54,885 INFO L225 Difference]: With dead ends: 2248 [2021-04-15 02:19:54,885 INFO L226 Difference]: Without dead ends: 2240 [2021-04-15 02:19:54,885 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 120.5ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:19:54,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2240 states. [2021-04-15 02:19:54,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2240 to 2079. [2021-04-15 02:19:54,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 2078 states have (on average 2.8816169393647737) internal successors, (5988), 2078 states have internal predecessors, (5988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:54,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 5988 transitions. [2021-04-15 02:19:54,904 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 5988 transitions. Word has length 20 [2021-04-15 02:19:54,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:54,904 INFO L480 AbstractCegarLoop]: Abstraction has 2079 states and 5988 transitions. [2021-04-15 02:19:54,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:54,905 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 5988 transitions. [2021-04-15 02:19:54,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:19:54,906 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:54,906 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:55,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:55,107 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:55,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:55,107 INFO L82 PathProgramCache]: Analyzing trace with hash -836470393, now seen corresponding path program 154 times [2021-04-15 02:19:55,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:55,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883020512] [2021-04-15 02:19:55,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:55,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:55,154 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:55,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883020512] [2021-04-15 02:19:55,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7018710] [2021-04-15 02:19:55,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:55,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:19:55,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:55,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:19:55,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:55,220 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:19:55,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:55,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:19:55,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881113337] [2021-04-15 02:19:55,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:19:55,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:55,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:19:55,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:19:55,221 INFO L87 Difference]: Start difference. First operand 2079 states and 5988 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:55,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:55,268 INFO L93 Difference]: Finished difference Result 2261 states and 6260 transitions. [2021-04-15 02:19:55,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:19:55,268 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:19:55,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:55,270 INFO L225 Difference]: With dead ends: 2261 [2021-04-15 02:19:55,270 INFO L226 Difference]: Without dead ends: 2259 [2021-04-15 02:19:55,270 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:19:55,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2021-04-15 02:19:55,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 2075. [2021-04-15 02:19:55,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2075 states, 2074 states have (on average 2.880424300867888) internal successors, (5974), 2074 states have internal predecessors, (5974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:55,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 5974 transitions. [2021-04-15 02:19:55,291 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 5974 transitions. Word has length 20 [2021-04-15 02:19:55,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:55,291 INFO L480 AbstractCegarLoop]: Abstraction has 2075 states and 5974 transitions. [2021-04-15 02:19:55,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:55,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 5974 transitions. [2021-04-15 02:19:55,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:19:55,293 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:55,293 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:55,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable610,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:55,494 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:55,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:55,494 INFO L82 PathProgramCache]: Analyzing trace with hash 908984297, now seen corresponding path program 155 times [2021-04-15 02:19:55,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:55,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964150720] [2021-04-15 02:19:55,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:55,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:55,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964150720] [2021-04-15 02:19:55,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783180939] [2021-04-15 02:19:55,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:55,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:19:55,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:55,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:55,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:19:55,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:55,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-04-15 02:19:55,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042622028] [2021-04-15 02:19:55,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:19:55,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:55,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:19:55,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:19:55,644 INFO L87 Difference]: Start difference. First operand 2075 states and 5974 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:55,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:55,725 INFO L93 Difference]: Finished difference Result 2242 states and 6197 transitions. [2021-04-15 02:19:55,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:19:55,726 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:19:55,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:55,730 INFO L225 Difference]: With dead ends: 2242 [2021-04-15 02:19:55,730 INFO L226 Difference]: Without dead ends: 2242 [2021-04-15 02:19:55,730 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:19:55,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2021-04-15 02:19:55,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2065. [2021-04-15 02:19:55,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.874515503875969) internal successors, (5933), 2064 states have internal predecessors, (5933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:55,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5933 transitions. [2021-04-15 02:19:55,761 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5933 transitions. Word has length 20 [2021-04-15 02:19:55,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:55,761 INFO L480 AbstractCegarLoop]: Abstraction has 2065 states and 5933 transitions. [2021-04-15 02:19:55,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:55,761 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5933 transitions. [2021-04-15 02:19:55,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:19:55,764 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:55,764 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:55,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-04-15 02:19:55,964 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:55,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:55,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1675369691, now seen corresponding path program 156 times [2021-04-15 02:19:55,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:55,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161729523] [2021-04-15 02:19:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:56,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161729523] [2021-04-15 02:19:56,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629371431] [2021-04-15 02:19:56,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:56,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:19:56,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:56,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:19:56,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:56,086 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:56,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:56,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:19:56,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539783046] [2021-04-15 02:19:56,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:19:56,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:56,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:19:56,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:19:56,087 INFO L87 Difference]: Start difference. First operand 2065 states and 5933 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:56,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:56,206 INFO L93 Difference]: Finished difference Result 2234 states and 6164 transitions. [2021-04-15 02:19:56,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:19:56,207 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:19:56,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:56,210 INFO L225 Difference]: With dead ends: 2234 [2021-04-15 02:19:56,210 INFO L226 Difference]: Without dead ends: 2231 [2021-04-15 02:19:56,210 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 88.9ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:19:56,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2021-04-15 02:19:56,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2055. [2021-04-15 02:19:56,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 2.8690360272638755) internal successors, (5893), 2054 states have internal predecessors, (5893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:56,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5893 transitions. [2021-04-15 02:19:56,236 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5893 transitions. Word has length 20 [2021-04-15 02:19:56,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:56,236 INFO L480 AbstractCegarLoop]: Abstraction has 2055 states and 5893 transitions. [2021-04-15 02:19:56,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:56,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5893 transitions. [2021-04-15 02:19:56,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:19:56,238 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:56,238 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:56,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable612 [2021-04-15 02:19:56,439 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:56,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:56,439 INFO L82 PathProgramCache]: Analyzing trace with hash -185964695, now seen corresponding path program 157 times [2021-04-15 02:19:56,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:56,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651375903] [2021-04-15 02:19:56,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:56,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:56,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651375903] [2021-04-15 02:19:56,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538651972] [2021-04-15 02:19:56,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:56,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:56,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:56,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:56,587 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:56,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:56,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-04-15 02:19:56,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866701232] [2021-04-15 02:19:56,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:19:56,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:56,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:19:56,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:19:56,588 INFO L87 Difference]: Start difference. First operand 2055 states and 5893 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:56,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:56,729 INFO L93 Difference]: Finished difference Result 2228 states and 6131 transitions. [2021-04-15 02:19:56,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:19:56,730 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:19:56,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:56,732 INFO L225 Difference]: With dead ends: 2228 [2021-04-15 02:19:56,732 INFO L226 Difference]: Without dead ends: 2224 [2021-04-15 02:19:56,733 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:19:56,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2021-04-15 02:19:56,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 2055. [2021-04-15 02:19:56,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 2.862706913339825) internal successors, (5880), 2054 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:56,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5880 transitions. [2021-04-15 02:19:56,759 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5880 transitions. Word has length 20 [2021-04-15 02:19:56,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:56,759 INFO L480 AbstractCegarLoop]: Abstraction has 2055 states and 5880 transitions. [2021-04-15 02:19:56,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:56,759 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5880 transitions. [2021-04-15 02:19:56,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:19:56,761 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:56,761 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:56,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-04-15 02:19:56,962 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:56,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:56,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1259050075, now seen corresponding path program 158 times [2021-04-15 02:19:56,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:56,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64276748] [2021-04-15 02:19:56,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:56,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:57,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64276748] [2021-04-15 02:19:57,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851983583] [2021-04-15 02:19:57,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:57,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:19:57,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:57,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:57,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:57,080 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:19:57,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:57,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-04-15 02:19:57,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899599614] [2021-04-15 02:19:57,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:19:57,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:57,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:19:57,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:19:57,081 INFO L87 Difference]: Start difference. First operand 2055 states and 5880 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:57,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:57,204 INFO L93 Difference]: Finished difference Result 2691 states and 7378 transitions. [2021-04-15 02:19:57,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:19:57,204 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:19:57,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:57,208 INFO L225 Difference]: With dead ends: 2691 [2021-04-15 02:19:57,208 INFO L226 Difference]: Without dead ends: 2685 [2021-04-15 02:19:57,208 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 104.2ms TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:19:57,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2021-04-15 02:19:57,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 2055. [2021-04-15 02:19:57,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 2.8612463485881205) internal successors, (5877), 2054 states have internal predecessors, (5877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:57,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5877 transitions. [2021-04-15 02:19:57,236 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5877 transitions. Word has length 20 [2021-04-15 02:19:57,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:57,236 INFO L480 AbstractCegarLoop]: Abstraction has 2055 states and 5877 transitions. [2021-04-15 02:19:57,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:57,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5877 transitions. [2021-04-15 02:19:57,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:19:57,239 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:57,239 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:57,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:57,439 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:57,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:57,439 INFO L82 PathProgramCache]: Analyzing trace with hash -164958487, now seen corresponding path program 159 times [2021-04-15 02:19:57,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:57,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452793165] [2021-04-15 02:19:57,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:57,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:57,510 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:57,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452793165] [2021-04-15 02:19:57,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712822144] [2021-04-15 02:19:57,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:57,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:19:57,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:57,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:19:57,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:57,569 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:57,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:57,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:19:57,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511623784] [2021-04-15 02:19:57,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:19:57,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:57,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:19:57,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:19:57,569 INFO L87 Difference]: Start difference. First operand 2055 states and 5877 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:57,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:57,737 INFO L93 Difference]: Finished difference Result 2703 states and 7388 transitions. [2021-04-15 02:19:57,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:19:57,737 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:19:57,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:57,741 INFO L225 Difference]: With dead ends: 2703 [2021-04-15 02:19:57,741 INFO L226 Difference]: Without dead ends: 2695 [2021-04-15 02:19:57,741 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:19:57,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2021-04-15 02:19:57,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 2065. [2021-04-15 02:19:57,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.862403100775194) internal successors, (5908), 2064 states have internal predecessors, (5908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:57,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5908 transitions. [2021-04-15 02:19:57,770 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5908 transitions. Word has length 20 [2021-04-15 02:19:57,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:57,770 INFO L480 AbstractCegarLoop]: Abstraction has 2065 states and 5908 transitions. [2021-04-15 02:19:57,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:57,770 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5908 transitions. [2021-04-15 02:19:57,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:19:57,772 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:57,772 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:57,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable615 [2021-04-15 02:19:57,973 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:57,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:57,973 INFO L82 PathProgramCache]: Analyzing trace with hash -607857627, now seen corresponding path program 160 times [2021-04-15 02:19:57,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:57,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877705764] [2021-04-15 02:19:57,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:57,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:58,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877705764] [2021-04-15 02:19:58,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416780051] [2021-04-15 02:19:58,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:58,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:19:58,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:58,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:58,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:58,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:58,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-04-15 02:19:58,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509594204] [2021-04-15 02:19:58,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:19:58,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:58,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:19:58,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:19:58,093 INFO L87 Difference]: Start difference. First operand 2065 states and 5908 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:58,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:58,242 INFO L93 Difference]: Finished difference Result 2452 states and 6775 transitions. [2021-04-15 02:19:58,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:19:58,243 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:19:58,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:58,245 INFO L225 Difference]: With dead ends: 2452 [2021-04-15 02:19:58,245 INFO L226 Difference]: Without dead ends: 2442 [2021-04-15 02:19:58,245 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 138.5ms TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:19:58,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2021-04-15 02:19:58,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2065. [2021-04-15 02:19:58,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.8614341085271318) internal successors, (5906), 2064 states have internal predecessors, (5906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:58,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5906 transitions. [2021-04-15 02:19:58,265 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5906 transitions. Word has length 20 [2021-04-15 02:19:58,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:58,265 INFO L480 AbstractCegarLoop]: Abstraction has 2065 states and 5906 transitions. [2021-04-15 02:19:58,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:58,266 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5906 transitions. [2021-04-15 02:19:58,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:19:58,267 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:58,267 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:58,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:58,468 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:58,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:58,468 INFO L82 PathProgramCache]: Analyzing trace with hash 130741455, now seen corresponding path program 161 times [2021-04-15 02:19:58,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:58,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354195141] [2021-04-15 02:19:58,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:58,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:58,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354195141] [2021-04-15 02:19:58,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156231096] [2021-04-15 02:19:58,530 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:58,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:19:58,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:58,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:58,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:58,629 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:19:58,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:58,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-04-15 02:19:58,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638965071] [2021-04-15 02:19:58,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:19:58,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:58,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:19:58,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:19:58,630 INFO L87 Difference]: Start difference. First operand 2065 states and 5906 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:58,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:58,805 INFO L93 Difference]: Finished difference Result 2203 states and 6075 transitions. [2021-04-15 02:19:58,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:19:58,806 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:19:58,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:58,810 INFO L225 Difference]: With dead ends: 2203 [2021-04-15 02:19:58,810 INFO L226 Difference]: Without dead ends: 2199 [2021-04-15 02:19:58,810 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 148.7ms TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:19:58,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-04-15 02:19:58,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 2018. [2021-04-15 02:19:58,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2017 states have (on average 2.8507684680218146) internal successors, (5750), 2017 states have internal predecessors, (5750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:58,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 5750 transitions. [2021-04-15 02:19:58,849 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 5750 transitions. Word has length 20 [2021-04-15 02:19:58,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:58,849 INFO L480 AbstractCegarLoop]: Abstraction has 2018 states and 5750 transitions. [2021-04-15 02:19:58,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:58,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 5750 transitions. [2021-04-15 02:19:58,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:19:58,852 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:58,852 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:59,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable617,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:59,069 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:59,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:59,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1438631789, now seen corresponding path program 162 times [2021-04-15 02:19:59,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:59,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083630016] [2021-04-15 02:19:59,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:59,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:59,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083630016] [2021-04-15 02:19:59,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503246493] [2021-04-15 02:19:59,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:59,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:19:59,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:59,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:19:59,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:59,199 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:59,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:59,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:19:59,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922831607] [2021-04-15 02:19:59,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:19:59,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:59,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:19:59,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:19:59,200 INFO L87 Difference]: Start difference. First operand 2018 states and 5750 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:59,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:59,333 INFO L93 Difference]: Finished difference Result 2240 states and 6144 transitions. [2021-04-15 02:19:59,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:19:59,334 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:19:59,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:59,337 INFO L225 Difference]: With dead ends: 2240 [2021-04-15 02:19:59,337 INFO L226 Difference]: Without dead ends: 2231 [2021-04-15 02:19:59,338 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 119.2ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:19:59,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2021-04-15 02:19:59,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2011. [2021-04-15 02:19:59,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2011 states, 2010 states have (on average 2.846268656716418) internal successors, (5721), 2010 states have internal predecessors, (5721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:59,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2011 states to 2011 states and 5721 transitions. [2021-04-15 02:19:59,366 INFO L78 Accepts]: Start accepts. Automaton has 2011 states and 5721 transitions. Word has length 20 [2021-04-15 02:19:59,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:59,366 INFO L480 AbstractCegarLoop]: Abstraction has 2011 states and 5721 transitions. [2021-04-15 02:19:59,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:59,367 INFO L276 IsEmpty]: Start isEmpty. Operand 2011 states and 5721 transitions. [2021-04-15 02:19:59,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:19:59,369 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:59,369 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:59,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:59,570 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:59,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:59,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1762243919, now seen corresponding path program 163 times [2021-04-15 02:19:59,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:59,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141040349] [2021-04-15 02:19:59,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:59,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141040349] [2021-04-15 02:19:59,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102238603] [2021-04-15 02:19:59,644 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:59,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:19:59,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:59,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:59,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-04-15 02:19:59,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988910523] [2021-04-15 02:19:59,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:19:59,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:59,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:19:59,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:19:59,700 INFO L87 Difference]: Start difference. First operand 2011 states and 5721 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:59,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:59,903 INFO L93 Difference]: Finished difference Result 2239 states and 6126 transitions. [2021-04-15 02:19:59,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:19:59,903 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:19:59,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:59,908 INFO L225 Difference]: With dead ends: 2239 [2021-04-15 02:19:59,908 INFO L226 Difference]: Without dead ends: 2231 [2021-04-15 02:19:59,908 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 149.5ms TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:19:59,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2021-04-15 02:19:59,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2024. [2021-04-15 02:19:59,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 2.842313395946614) internal successors, (5750), 2023 states have internal predecessors, (5750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:59,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 5750 transitions. [2021-04-15 02:19:59,948 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 5750 transitions. Word has length 20 [2021-04-15 02:19:59,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:59,948 INFO L480 AbstractCegarLoop]: Abstraction has 2024 states and 5750 transitions. [2021-04-15 02:19:59,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:59,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 5750 transitions. [2021-04-15 02:19:59,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:19:59,951 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:59,951 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:00,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:00,165 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:00,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:00,165 INFO L82 PathProgramCache]: Analyzing trace with hash 2089824237, now seen corresponding path program 164 times [2021-04-15 02:20:00,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:00,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965186061] [2021-04-15 02:20:00,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:00,244 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:00,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965186061] [2021-04-15 02:20:00,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094027916] [2021-04-15 02:20:00,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:00,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:00,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:00,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:20:00,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:00,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:00,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-04-15 02:20:00,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249944073] [2021-04-15 02:20:00,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:00,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:00,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:00,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:00,300 INFO L87 Difference]: Start difference. First operand 2024 states and 5750 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:00,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:00,477 INFO L93 Difference]: Finished difference Result 2477 states and 6771 transitions. [2021-04-15 02:20:00,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:20:00,477 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:20:00,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:00,480 INFO L225 Difference]: With dead ends: 2477 [2021-04-15 02:20:00,481 INFO L226 Difference]: Without dead ends: 2467 [2021-04-15 02:20:00,481 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 154.4ms TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:20:00,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2021-04-15 02:20:00,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 2031. [2021-04-15 02:20:00,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 2.840394088669951) internal successors, (5766), 2030 states have internal predecessors, (5766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:00,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 5766 transitions. [2021-04-15 02:20:00,510 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 5766 transitions. Word has length 20 [2021-04-15 02:20:00,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:00,510 INFO L480 AbstractCegarLoop]: Abstraction has 2031 states and 5766 transitions. [2021-04-15 02:20:00,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:00,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 5766 transitions. [2021-04-15 02:20:00,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:00,512 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:00,512 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:00,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable620 [2021-04-15 02:20:00,713 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:00,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:00,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1135579185, now seen corresponding path program 165 times [2021-04-15 02:20:00,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:00,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969083634] [2021-04-15 02:20:00,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:00,768 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:00,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969083634] [2021-04-15 02:20:00,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161399985] [2021-04-15 02:20:00,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:00,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:20:00,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:00,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:20:00,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:00,832 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:00,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:00,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:20:00,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189138277] [2021-04-15 02:20:00,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:20:00,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:00,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:20:00,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:00,833 INFO L87 Difference]: Start difference. First operand 2031 states and 5766 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:00,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:00,927 INFO L93 Difference]: Finished difference Result 2228 states and 6076 transitions. [2021-04-15 02:20:00,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:20:00,928 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:20:00,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:00,931 INFO L225 Difference]: With dead ends: 2228 [2021-04-15 02:20:00,931 INFO L226 Difference]: Without dead ends: 2228 [2021-04-15 02:20:00,931 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:20:00,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-04-15 02:20:00,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 2015. [2021-04-15 02:20:00,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 2.837140019860973) internal successors, (5714), 2014 states have internal predecessors, (5714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:00,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 5714 transitions. [2021-04-15 02:20:00,960 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 5714 transitions. Word has length 20 [2021-04-15 02:20:00,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:00,960 INFO L480 AbstractCegarLoop]: Abstraction has 2015 states and 5714 transitions. [2021-04-15 02:20:00,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:00,960 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 5714 transitions. [2021-04-15 02:20:00,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:00,962 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:00,962 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:01,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable621 [2021-04-15 02:20:01,163 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:01,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:01,163 INFO L82 PathProgramCache]: Analyzing trace with hash -460779053, now seen corresponding path program 166 times [2021-04-15 02:20:01,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:01,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829738054] [2021-04-15 02:20:01,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:01,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:01,238 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:01,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829738054] [2021-04-15 02:20:01,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275701498] [2021-04-15 02:20:01,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:01,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:01,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:01,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:20:01,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:01,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:01,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-04-15 02:20:01,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446812025] [2021-04-15 02:20:01,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:20:01,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:01,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:20:01,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:01,303 INFO L87 Difference]: Start difference. First operand 2015 states and 5714 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:01,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:01,488 INFO L93 Difference]: Finished difference Result 2228 states and 6116 transitions. [2021-04-15 02:20:01,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:20:01,489 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:20:01,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:01,492 INFO L225 Difference]: With dead ends: 2228 [2021-04-15 02:20:01,492 INFO L226 Difference]: Without dead ends: 2218 [2021-04-15 02:20:01,492 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 149.6ms TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:20:01,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2021-04-15 02:20:01,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 2010. [2021-04-15 02:20:01,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2010 states, 2009 states have (on average 2.8322548531607765) internal successors, (5690), 2009 states have internal predecessors, (5690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:01,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 5690 transitions. [2021-04-15 02:20:01,521 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 5690 transitions. Word has length 20 [2021-04-15 02:20:01,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:01,521 INFO L480 AbstractCegarLoop]: Abstraction has 2010 states and 5690 transitions. [2021-04-15 02:20:01,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:01,521 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 5690 transitions. [2021-04-15 02:20:01,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:01,523 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:01,523 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:01,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable622,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:01,724 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:01,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:01,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1325858673, now seen corresponding path program 167 times [2021-04-15 02:20:01,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:01,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595638575] [2021-04-15 02:20:01,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:01,768 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:01,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595638575] [2021-04-15 02:20:01,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086642680] [2021-04-15 02:20:01,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:01,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:20:01,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:01,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:20:01,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:20:01,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:01,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-04-15 02:20:01,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514075841] [2021-04-15 02:20:01,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:20:01,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:01,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:20:01,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:01,840 INFO L87 Difference]: Start difference. First operand 2010 states and 5690 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:01,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:01,904 INFO L93 Difference]: Finished difference Result 2251 states and 6063 transitions. [2021-04-15 02:20:01,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:20:01,904 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:20:01,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:01,907 INFO L225 Difference]: With dead ends: 2251 [2021-04-15 02:20:01,907 INFO L226 Difference]: Without dead ends: 2251 [2021-04-15 02:20:01,907 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 50.2ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:01,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2021-04-15 02:20:01,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 2017. [2021-04-15 02:20:01,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.8348214285714284) internal successors, (5715), 2016 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:01,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5715 transitions. [2021-04-15 02:20:01,929 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5715 transitions. Word has length 20 [2021-04-15 02:20:01,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:01,929 INFO L480 AbstractCegarLoop]: Abstraction has 2017 states and 5715 transitions. [2021-04-15 02:20:01,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:01,929 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5715 transitions. [2021-04-15 02:20:01,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:01,931 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:01,931 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:02,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable623 [2021-04-15 02:20:02,132 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:02,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:02,132 INFO L82 PathProgramCache]: Analyzing trace with hash 2130209325, now seen corresponding path program 168 times [2021-04-15 02:20:02,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:02,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001892969] [2021-04-15 02:20:02,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:02,189 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:02,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001892969] [2021-04-15 02:20:02,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365485479] [2021-04-15 02:20:02,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:02,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:20:02,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:02,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:20:02,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:02,241 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:02,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:02,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:20:02,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707087669] [2021-04-15 02:20:02,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:20:02,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:02,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:20:02,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:02,242 INFO L87 Difference]: Start difference. First operand 2017 states and 5715 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:02,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:02,363 INFO L93 Difference]: Finished difference Result 2206 states and 5970 transitions. [2021-04-15 02:20:02,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:20:02,364 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:20:02,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:02,366 INFO L225 Difference]: With dead ends: 2206 [2021-04-15 02:20:02,367 INFO L226 Difference]: Without dead ends: 2204 [2021-04-15 02:20:02,367 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:20:02,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-04-15 02:20:02,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 2017. [2021-04-15 02:20:02,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.831845238095238) internal successors, (5709), 2016 states have internal predecessors, (5709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:02,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5709 transitions. [2021-04-15 02:20:02,393 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5709 transitions. Word has length 20 [2021-04-15 02:20:02,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:02,393 INFO L480 AbstractCegarLoop]: Abstraction has 2017 states and 5709 transitions. [2021-04-15 02:20:02,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:02,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5709 transitions. [2021-04-15 02:20:02,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:02,395 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:02,396 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:02,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-04-15 02:20:02,596 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:02,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:02,596 INFO L82 PathProgramCache]: Analyzing trace with hash -675352975, now seen corresponding path program 169 times [2021-04-15 02:20:02,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:02,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222542904] [2021-04-15 02:20:02,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:02,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:02,652 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:02,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222542904] [2021-04-15 02:20:02,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592960850] [2021-04-15 02:20:02,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:02,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:02,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:20:02,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:02,713 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:20:02,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:02,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-04-15 02:20:02,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54140088] [2021-04-15 02:20:02,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:02,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:02,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:02,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:02,714 INFO L87 Difference]: Start difference. First operand 2017 states and 5709 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:02,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:02,854 INFO L93 Difference]: Finished difference Result 2212 states and 5972 transitions. [2021-04-15 02:20:02,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:20:02,854 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:20:02,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:02,857 INFO L225 Difference]: With dead ends: 2212 [2021-04-15 02:20:02,857 INFO L226 Difference]: Without dead ends: 2208 [2021-04-15 02:20:02,857 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 108.4ms TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:20:02,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-04-15 02:20:02,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2017. [2021-04-15 02:20:02,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.825892857142857) internal successors, (5697), 2016 states have internal predecessors, (5697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:02,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5697 transitions. [2021-04-15 02:20:02,884 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5697 transitions. Word has length 20 [2021-04-15 02:20:02,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:02,884 INFO L480 AbstractCegarLoop]: Abstraction has 2017 states and 5697 transitions. [2021-04-15 02:20:02,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:02,884 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5697 transitions. [2021-04-15 02:20:02,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:02,886 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:02,886 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:03,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable625 [2021-04-15 02:20:03,087 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:03,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:03,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1748438355, now seen corresponding path program 170 times [2021-04-15 02:20:03,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:03,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418979054] [2021-04-15 02:20:03,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:03,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418979054] [2021-04-15 02:20:03,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524171437] [2021-04-15 02:20:03,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:03,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:03,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:03,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:20:03,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:03,234 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:03,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:03,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-04-15 02:20:03,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458326503] [2021-04-15 02:20:03,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:03,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:03,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:03,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:03,234 INFO L87 Difference]: Start difference. First operand 2017 states and 5697 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:03,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:03,385 INFO L93 Difference]: Finished difference Result 2220 states and 5971 transitions. [2021-04-15 02:20:03,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:20:03,386 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:20:03,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:03,389 INFO L225 Difference]: With dead ends: 2220 [2021-04-15 02:20:03,389 INFO L226 Difference]: Without dead ends: 2214 [2021-04-15 02:20:03,390 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 120.4ms TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:20:03,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-04-15 02:20:03,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 2017. [2021-04-15 02:20:03,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.8179563492063493) internal successors, (5681), 2016 states have internal predecessors, (5681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:03,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5681 transitions. [2021-04-15 02:20:03,423 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5681 transitions. Word has length 20 [2021-04-15 02:20:03,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:03,423 INFO L480 AbstractCegarLoop]: Abstraction has 2017 states and 5681 transitions. [2021-04-15 02:20:03,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:03,423 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5681 transitions. [2021-04-15 02:20:03,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:03,426 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:03,426 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:03,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:03,649 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:03,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:03,649 INFO L82 PathProgramCache]: Analyzing trace with hash -654346767, now seen corresponding path program 171 times [2021-04-15 02:20:03,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:03,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289691637] [2021-04-15 02:20:03,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:03,714 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:03,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289691637] [2021-04-15 02:20:03,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997890432] [2021-04-15 02:20:03,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:03,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:20:03,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:03,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:20:03,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:03,778 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:03,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:03,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:20:03,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449289064] [2021-04-15 02:20:03,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:03,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:03,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:03,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:03,779 INFO L87 Difference]: Start difference. First operand 2017 states and 5681 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:03,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:03,941 INFO L93 Difference]: Finished difference Result 2831 states and 7603 transitions. [2021-04-15 02:20:03,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:20:03,941 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:20:03,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:03,945 INFO L225 Difference]: With dead ends: 2831 [2021-04-15 02:20:03,945 INFO L226 Difference]: Without dead ends: 2823 [2021-04-15 02:20:03,945 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 135.7ms TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:20:03,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2021-04-15 02:20:03,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2036. [2021-04-15 02:20:03,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2036 states, 2035 states have (on average 2.8147420147420146) internal successors, (5728), 2035 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:03,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2036 states to 2036 states and 5728 transitions. [2021-04-15 02:20:03,978 INFO L78 Accepts]: Start accepts. Automaton has 2036 states and 5728 transitions. Word has length 20 [2021-04-15 02:20:03,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:03,978 INFO L480 AbstractCegarLoop]: Abstraction has 2036 states and 5728 transitions. [2021-04-15 02:20:03,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:03,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2036 states and 5728 transitions. [2021-04-15 02:20:03,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:03,980 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:03,980 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:04,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable627,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:04,181 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:04,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:04,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1097245907, now seen corresponding path program 172 times [2021-04-15 02:20:04,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:04,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126713213] [2021-04-15 02:20:04,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:04,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:04,262 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:04,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126713213] [2021-04-15 02:20:04,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733677979] [2021-04-15 02:20:04,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:04,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:04,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:04,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:20:04,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:04,324 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:04,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:04,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-04-15 02:20:04,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96459383] [2021-04-15 02:20:04,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:20:04,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:04,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:20:04,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:04,325 INFO L87 Difference]: Start difference. First operand 2036 states and 5728 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:04,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:04,516 INFO L93 Difference]: Finished difference Result 2850 states and 7623 transitions. [2021-04-15 02:20:04,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:20:04,516 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:20:04,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:04,520 INFO L225 Difference]: With dead ends: 2850 [2021-04-15 02:20:04,520 INFO L226 Difference]: Without dead ends: 2840 [2021-04-15 02:20:04,520 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 153.0ms TimeCoverageRelationStatistics Valid=209, Invalid=441, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:20:04,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-04-15 02:20:04,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2053. [2021-04-15 02:20:04,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 2.8118908382066277) internal successors, (5770), 2052 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:04,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 5770 transitions. [2021-04-15 02:20:04,550 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 5770 transitions. Word has length 20 [2021-04-15 02:20:04,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:04,550 INFO L480 AbstractCegarLoop]: Abstraction has 2053 states and 5770 transitions. [2021-04-15 02:20:04,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:04,551 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 5770 transitions. [2021-04-15 02:20:04,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:04,553 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:04,553 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:04,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable628,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:04,754 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:04,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:04,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1942217359, now seen corresponding path program 173 times [2021-04-15 02:20:04,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:04,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244284858] [2021-04-15 02:20:04,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:04,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:04,846 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:04,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244284858] [2021-04-15 02:20:04,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588504535] [2021-04-15 02:20:04,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:04,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:20:04,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:04,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:20:04,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:04,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:04,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-04-15 02:20:04,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803497533] [2021-04-15 02:20:04,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:20:04,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:04,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:20:04,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:04,920 INFO L87 Difference]: Start difference. First operand 2053 states and 5770 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:05,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:05,136 INFO L93 Difference]: Finished difference Result 2624 states and 7060 transitions. [2021-04-15 02:20:05,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:20:05,136 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:20:05,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:05,139 INFO L225 Difference]: With dead ends: 2624 [2021-04-15 02:20:05,139 INFO L226 Difference]: Without dead ends: 2612 [2021-04-15 02:20:05,139 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 202.2ms TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:20:05,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2021-04-15 02:20:05,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 2055. [2021-04-15 02:20:05,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 2.809152872444012) internal successors, (5770), 2054 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:05,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5770 transitions. [2021-04-15 02:20:05,161 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5770 transitions. Word has length 20 [2021-04-15 02:20:05,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:05,162 INFO L480 AbstractCegarLoop]: Abstraction has 2055 states and 5770 transitions. [2021-04-15 02:20:05,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:05,162 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5770 transitions. [2021-04-15 02:20:05,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:05,163 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:05,163 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:05,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:05,364 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:05,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:05,364 INFO L82 PathProgramCache]: Analyzing trace with hash -2140466681, now seen corresponding path program 174 times [2021-04-15 02:20:05,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:05,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678821555] [2021-04-15 02:20:05,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:05,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:05,444 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:05,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678821555] [2021-04-15 02:20:05,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162957314] [2021-04-15 02:20:05,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:05,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:20:05,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:05,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:20:05,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:05,508 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:05,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:05,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-04-15 02:20:05,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592573264] [2021-04-15 02:20:05,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:20:05,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:05,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:20:05,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:05,509 INFO L87 Difference]: Start difference. First operand 2055 states and 5770 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:05,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:05,645 INFO L93 Difference]: Finished difference Result 2268 states and 6139 transitions. [2021-04-15 02:20:05,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:20:05,645 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:20:05,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:05,647 INFO L225 Difference]: With dead ends: 2268 [2021-04-15 02:20:05,647 INFO L226 Difference]: Without dead ends: 2264 [2021-04-15 02:20:05,647 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:20:05,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-04-15 02:20:05,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2086. [2021-04-15 02:20:05,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 2085 states have (on average 2.8134292565947243) internal successors, (5866), 2085 states have internal predecessors, (5866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:05,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 5866 transitions. [2021-04-15 02:20:05,673 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 5866 transitions. Word has length 20 [2021-04-15 02:20:05,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:05,673 INFO L480 AbstractCegarLoop]: Abstraction has 2086 states and 5866 transitions. [2021-04-15 02:20:05,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:05,673 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 5866 transitions. [2021-04-15 02:20:05,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:05,676 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:05,676 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:05,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-04-15 02:20:05,876 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:05,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:05,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1369412393, now seen corresponding path program 175 times [2021-04-15 02:20:05,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:05,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364493720] [2021-04-15 02:20:05,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:05,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:05,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364493720] [2021-04-15 02:20:05,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566508581] [2021-04-15 02:20:05,946 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:05,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:05,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:20:05,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:06,024 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:20:06,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:06,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2021-04-15 02:20:06,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010755736] [2021-04-15 02:20:06,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:20:06,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:06,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:20:06,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:06,025 INFO L87 Difference]: Start difference. First operand 2086 states and 5866 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:06,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:06,192 INFO L93 Difference]: Finished difference Result 2348 states and 6353 transitions. [2021-04-15 02:20:06,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:20:06,192 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:20:06,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:06,195 INFO L225 Difference]: With dead ends: 2348 [2021-04-15 02:20:06,196 INFO L226 Difference]: Without dead ends: 2340 [2021-04-15 02:20:06,196 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 142.0ms TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:20:06,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2340 states. [2021-04-15 02:20:06,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2340 to 2086. [2021-04-15 02:20:06,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 2085 states have (on average 2.809592326139089) internal successors, (5858), 2085 states have internal predecessors, (5858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:06,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 5858 transitions. [2021-04-15 02:20:06,224 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 5858 transitions. Word has length 20 [2021-04-15 02:20:06,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:06,225 INFO L480 AbstractCegarLoop]: Abstraction has 2086 states and 5858 transitions. [2021-04-15 02:20:06,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:06,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 5858 transitions. [2021-04-15 02:20:06,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:06,227 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:06,227 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:06,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-04-15 02:20:06,427 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:06,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:06,428 INFO L82 PathProgramCache]: Analyzing trace with hash 926513253, now seen corresponding path program 176 times [2021-04-15 02:20:06,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:06,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937410819] [2021-04-15 02:20:06,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:06,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937410819] [2021-04-15 02:20:06,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612396073] [2021-04-15 02:20:06,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:06,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:06,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:06,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:20:06,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:06,577 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:06,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:06,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 15 [2021-04-15 02:20:06,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477291740] [2021-04-15 02:20:06,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:20:06,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:06,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:20:06,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:20:06,578 INFO L87 Difference]: Start difference. First operand 2086 states and 5858 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:06,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:06,764 INFO L93 Difference]: Finished difference Result 2366 states and 6371 transitions. [2021-04-15 02:20:06,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:20:06,765 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:20:06,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:06,768 INFO L225 Difference]: With dead ends: 2366 [2021-04-15 02:20:06,768 INFO L226 Difference]: Without dead ends: 2356 [2021-04-15 02:20:06,768 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 161.9ms TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:20:06,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-04-15 02:20:06,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2100. [2021-04-15 02:20:06,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2100 states, 2099 states have (on average 2.8075273939971415) internal successors, (5893), 2099 states have internal predecessors, (5893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:06,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2100 states to 2100 states and 5893 transitions. [2021-04-15 02:20:06,804 INFO L78 Accepts]: Start accepts. Automaton has 2100 states and 5893 transitions. Word has length 20 [2021-04-15 02:20:06,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:06,804 INFO L480 AbstractCegarLoop]: Abstraction has 2100 states and 5893 transitions. [2021-04-15 02:20:06,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:06,804 INFO L276 IsEmpty]: Start isEmpty. Operand 2100 states and 5893 transitions. [2021-04-15 02:20:06,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:06,806 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:06,806 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:07,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable632 [2021-04-15 02:20:07,007 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:07,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:07,008 INFO L82 PathProgramCache]: Analyzing trace with hash 81541801, now seen corresponding path program 177 times [2021-04-15 02:20:07,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:07,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937289676] [2021-04-15 02:20:07,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:07,087 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:07,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937289676] [2021-04-15 02:20:07,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149167434] [2021-04-15 02:20:07,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:07,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:20:07,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:07,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:20:07,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:07,161 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:07,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:07,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-04-15 02:20:07,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762293547] [2021-04-15 02:20:07,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:20:07,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:07,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:20:07,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:20:07,162 INFO L87 Difference]: Start difference. First operand 2100 states and 5893 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:07,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:07,374 INFO L93 Difference]: Finished difference Result 2617 states and 7055 transitions. [2021-04-15 02:20:07,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:20:07,375 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:20:07,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:07,378 INFO L225 Difference]: With dead ends: 2617 [2021-04-15 02:20:07,378 INFO L226 Difference]: Without dead ends: 2605 [2021-04-15 02:20:07,378 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 197.9ms TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:20:07,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2021-04-15 02:20:07,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 2100. [2021-04-15 02:20:07,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2100 states, 2099 states have (on average 2.806574559313959) internal successors, (5891), 2099 states have internal predecessors, (5891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:07,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2100 states to 2100 states and 5891 transitions. [2021-04-15 02:20:07,407 INFO L78 Accepts]: Start accepts. Automaton has 2100 states and 5891 transitions. Word has length 20 [2021-04-15 02:20:07,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:07,407 INFO L480 AbstractCegarLoop]: Abstraction has 2100 states and 5891 transitions. [2021-04-15 02:20:07,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:07,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2100 states and 5891 transitions. [2021-04-15 02:20:07,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:07,410 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:07,410 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:07,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable633,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:07,610 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:07,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:07,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1400047683, now seen corresponding path program 178 times [2021-04-15 02:20:07,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:07,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273786274] [2021-04-15 02:20:07,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:07,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:07,693 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:07,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273786274] [2021-04-15 02:20:07,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710777789] [2021-04-15 02:20:07,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:07,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:07,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:07,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:20:07,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:07,775 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:07,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:07,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-04-15 02:20:07,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18112674] [2021-04-15 02:20:07,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:20:07,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:07,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:20:07,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:07,776 INFO L87 Difference]: Start difference. First operand 2100 states and 5891 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:07,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:07,912 INFO L93 Difference]: Finished difference Result 2417 states and 6519 transitions. [2021-04-15 02:20:07,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:20:07,912 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:20:07,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:07,917 INFO L225 Difference]: With dead ends: 2417 [2021-04-15 02:20:07,917 INFO L226 Difference]: Without dead ends: 2417 [2021-04-15 02:20:07,917 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:20:07,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-04-15 02:20:07,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 2170. [2021-04-15 02:20:07,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2169 states have (on average 2.827109266943292) internal successors, (6132), 2169 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:07,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 6132 transitions. [2021-04-15 02:20:07,958 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 6132 transitions. Word has length 20 [2021-04-15 02:20:07,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:07,960 INFO L480 AbstractCegarLoop]: Abstraction has 2170 states and 6132 transitions. [2021-04-15 02:20:07,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:07,960 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 6132 transitions. [2021-04-15 02:20:07,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:07,963 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:07,963 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:08,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable634,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:08,188 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:08,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:08,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1677748861, now seen corresponding path program 179 times [2021-04-15 02:20:08,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:08,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264252780] [2021-04-15 02:20:08,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:08,302 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:08,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264252780] [2021-04-15 02:20:08,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199095463] [2021-04-15 02:20:08,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:08,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:20:08,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:08,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:20:08,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:08,388 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:08,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:08,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 16 [2021-04-15 02:20:08,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627980662] [2021-04-15 02:20:08,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:20:08,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:08,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:20:08,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:20:08,389 INFO L87 Difference]: Start difference. First operand 2170 states and 6132 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:08,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:08,558 INFO L93 Difference]: Finished difference Result 2716 states and 7385 transitions. [2021-04-15 02:20:08,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:20:08,558 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:20:08,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:08,561 INFO L225 Difference]: With dead ends: 2716 [2021-04-15 02:20:08,561 INFO L226 Difference]: Without dead ends: 2704 [2021-04-15 02:20:08,561 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 210.4ms TimeCoverageRelationStatistics Valid=206, Invalid=496, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:20:08,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-04-15 02:20:08,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2170. [2021-04-15 02:20:08,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2169 states have (on average 2.8261871830336562) internal successors, (6130), 2169 states have internal predecessors, (6130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:08,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 6130 transitions. [2021-04-15 02:20:08,583 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 6130 transitions. Word has length 20 [2021-04-15 02:20:08,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:08,583 INFO L480 AbstractCegarLoop]: Abstraction has 2170 states and 6130 transitions. [2021-04-15 02:20:08,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:08,583 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 6130 transitions. [2021-04-15 02:20:08,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:08,585 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:08,585 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:08,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable635 [2021-04-15 02:20:08,785 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:08,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:08,786 INFO L82 PathProgramCache]: Analyzing trace with hash 682973831, now seen corresponding path program 180 times [2021-04-15 02:20:08,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:08,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218600800] [2021-04-15 02:20:08,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:08,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:08,893 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:08,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218600800] [2021-04-15 02:20:08,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330386323] [2021-04-15 02:20:08,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:08,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:20:08,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:08,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:20:08,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:08,971 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:08,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:08,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 14 [2021-04-15 02:20:08,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573819246] [2021-04-15 02:20:08,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:20:08,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:08,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:20:08,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:08,972 INFO L87 Difference]: Start difference. First operand 2170 states and 6130 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:09,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:09,077 INFO L93 Difference]: Finished difference Result 2664 states and 7257 transitions. [2021-04-15 02:20:09,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:20:09,077 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:20:09,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:09,081 INFO L225 Difference]: With dead ends: 2664 [2021-04-15 02:20:09,081 INFO L226 Difference]: Without dead ends: 2664 [2021-04-15 02:20:09,081 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:20:09,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-04-15 02:20:09,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2389. [2021-04-15 02:20:09,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2389 states, 2388 states have (on average 2.8618090452261304) internal successors, (6834), 2388 states have internal predecessors, (6834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:09,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 6834 transitions. [2021-04-15 02:20:09,114 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 6834 transitions. Word has length 20 [2021-04-15 02:20:09,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:09,115 INFO L480 AbstractCegarLoop]: Abstraction has 2389 states and 6834 transitions. [2021-04-15 02:20:09,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:09,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 6834 transitions. [2021-04-15 02:20:09,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:09,117 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:09,117 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:09,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:09,318 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:09,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:09,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1866538775, now seen corresponding path program 181 times [2021-04-15 02:20:09,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:09,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212069426] [2021-04-15 02:20:09,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:09,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:09,398 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:09,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212069426] [2021-04-15 02:20:09,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380273853] [2021-04-15 02:20:09,399 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:09,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:09,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:20:09,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:09,465 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:09,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:09,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 15 [2021-04-15 02:20:09,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382288728] [2021-04-15 02:20:09,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:20:09,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:09,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:20:09,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:20:09,466 INFO L87 Difference]: Start difference. First operand 2389 states and 6834 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:09,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:09,561 INFO L93 Difference]: Finished difference Result 2613 states and 7149 transitions. [2021-04-15 02:20:09,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:20:09,561 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:20:09,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:09,565 INFO L225 Difference]: With dead ends: 2613 [2021-04-15 02:20:09,565 INFO L226 Difference]: Without dead ends: 2613 [2021-04-15 02:20:09,565 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:20:09,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2021-04-15 02:20:09,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 2388. [2021-04-15 02:20:09,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 2.860913280268119) internal successors, (6829), 2387 states have internal predecessors, (6829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:09,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6829 transitions. [2021-04-15 02:20:09,597 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6829 transitions. Word has length 20 [2021-04-15 02:20:09,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:09,597 INFO L480 AbstractCegarLoop]: Abstraction has 2388 states and 6829 transitions. [2021-04-15 02:20:09,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:09,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6829 transitions. [2021-04-15 02:20:09,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:09,600 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:09,600 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:09,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable637 [2021-04-15 02:20:09,801 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:09,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:09,801 INFO L82 PathProgramCache]: Analyzing trace with hash -155925467, now seen corresponding path program 182 times [2021-04-15 02:20:09,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:09,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105578712] [2021-04-15 02:20:09,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:09,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:09,876 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:09,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105578712] [2021-04-15 02:20:09,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734871199] [2021-04-15 02:20:09,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:09,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:09,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:09,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:20:09,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:09,958 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 31 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:20:09,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:09,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 14 [2021-04-15 02:20:09,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235860670] [2021-04-15 02:20:09,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:20:09,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:09,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:20:09,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:09,959 INFO L87 Difference]: Start difference. First operand 2388 states and 6829 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:10,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:10,127 INFO L93 Difference]: Finished difference Result 2617 states and 7158 transitions. [2021-04-15 02:20:10,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:20:10,127 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:20:10,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:10,131 INFO L225 Difference]: With dead ends: 2617 [2021-04-15 02:20:10,131 INFO L226 Difference]: Without dead ends: 2615 [2021-04-15 02:20:10,131 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 143.3ms TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:20:10,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2615 states. [2021-04-15 02:20:10,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2615 to 2388. [2021-04-15 02:20:10,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 2.8600754084625053) internal successors, (6827), 2387 states have internal predecessors, (6827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:10,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6827 transitions. [2021-04-15 02:20:10,162 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6827 transitions. Word has length 20 [2021-04-15 02:20:10,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:10,162 INFO L480 AbstractCegarLoop]: Abstraction has 2388 states and 6827 transitions. [2021-04-15 02:20:10,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:10,162 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6827 transitions. [2021-04-15 02:20:10,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:10,165 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:10,165 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:10,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable638,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:10,365 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:10,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:10,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1333479529, now seen corresponding path program 183 times [2021-04-15 02:20:10,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:10,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025169952] [2021-04-15 02:20:10,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:10,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:10,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025169952] [2021-04-15 02:20:10,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913867526] [2021-04-15 02:20:10,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:10,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:20:10,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:10,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:20:10,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:10,524 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:10,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:10,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2021-04-15 02:20:10,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231954747] [2021-04-15 02:20:10,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:20:10,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:10,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:20:10,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:20:10,525 INFO L87 Difference]: Start difference. First operand 2388 states and 6827 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:10,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:10,680 INFO L93 Difference]: Finished difference Result 2623 states and 7164 transitions. [2021-04-15 02:20:10,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:20:10,680 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:20:10,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:10,683 INFO L225 Difference]: With dead ends: 2623 [2021-04-15 02:20:10,683 INFO L226 Difference]: Without dead ends: 2619 [2021-04-15 02:20:10,683 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 152.3ms TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:20:10,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2619 states. [2021-04-15 02:20:10,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2619 to 2395. [2021-04-15 02:20:10,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 2.8613199665831246) internal successors, (6850), 2394 states have internal predecessors, (6850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:10,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 6850 transitions. [2021-04-15 02:20:10,716 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 6850 transitions. Word has length 20 [2021-04-15 02:20:10,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:10,716 INFO L480 AbstractCegarLoop]: Abstraction has 2395 states and 6850 transitions. [2021-04-15 02:20:10,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:10,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 6850 transitions. [2021-04-15 02:20:10,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:10,718 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:10,718 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:10,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable639 [2021-04-15 02:20:10,918 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:10,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:10,919 INFO L82 PathProgramCache]: Analyzing trace with hash 260394149, now seen corresponding path program 184 times [2021-04-15 02:20:10,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:10,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179055294] [2021-04-15 02:20:10,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:10,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179055294] [2021-04-15 02:20:10,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802204890] [2021-04-15 02:20:10,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:11,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:11,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:11,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:20:11,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:11,073 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:20:11,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:11,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2021-04-15 02:20:11,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123144679] [2021-04-15 02:20:11,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:20:11,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:11,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:20:11,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:20:11,074 INFO L87 Difference]: Start difference. First operand 2395 states and 6850 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:11,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:11,258 INFO L93 Difference]: Finished difference Result 3316 states and 9099 transitions. [2021-04-15 02:20:11,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:20:11,258 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:20:11,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:11,265 INFO L225 Difference]: With dead ends: 3316 [2021-04-15 02:20:11,265 INFO L226 Difference]: Without dead ends: 3310 [2021-04-15 02:20:11,265 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 163.2ms TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:20:11,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2021-04-15 02:20:11,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 2395. [2021-04-15 02:20:11,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 2.8592314118629907) internal successors, (6845), 2394 states have internal predecessors, (6845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:11,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 6845 transitions. [2021-04-15 02:20:11,306 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 6845 transitions. Word has length 20 [2021-04-15 02:20:11,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:11,306 INFO L480 AbstractCegarLoop]: Abstraction has 2395 states and 6845 transitions. [2021-04-15 02:20:11,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:11,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 6845 transitions. [2021-04-15 02:20:11,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:11,309 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:11,309 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:11,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable640 [2021-04-15 02:20:11,533 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:11,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:11,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1354485737, now seen corresponding path program 185 times [2021-04-15 02:20:11,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:11,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634405820] [2021-04-15 02:20:11,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:11,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:11,637 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:11,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634405820] [2021-04-15 02:20:11,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064830922] [2021-04-15 02:20:11,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:11,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:20:11,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:11,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:20:11,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:11,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:11,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 16 [2021-04-15 02:20:11,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753247797] [2021-04-15 02:20:11,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:20:11,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:11,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:20:11,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:20:11,721 INFO L87 Difference]: Start difference. First operand 2395 states and 6845 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:11,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:11,905 INFO L93 Difference]: Finished difference Result 3332 states and 9114 transitions. [2021-04-15 02:20:11,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:20:11,906 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:20:11,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:11,911 INFO L225 Difference]: With dead ends: 3332 [2021-04-15 02:20:11,911 INFO L226 Difference]: Without dead ends: 3324 [2021-04-15 02:20:11,911 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 191.6ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:20:11,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3324 states. [2021-04-15 02:20:11,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3324 to 2411. [2021-04-15 02:20:11,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2411 states, 2410 states have (on average 2.85850622406639) internal successors, (6889), 2410 states have internal predecessors, (6889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:11,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2411 states to 2411 states and 6889 transitions. [2021-04-15 02:20:11,955 INFO L78 Accepts]: Start accepts. Automaton has 2411 states and 6889 transitions. Word has length 20 [2021-04-15 02:20:11,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:11,955 INFO L480 AbstractCegarLoop]: Abstraction has 2411 states and 6889 transitions. [2021-04-15 02:20:11,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:11,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2411 states and 6889 transitions. [2021-04-15 02:20:11,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:11,958 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:11,958 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:12,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-04-15 02:20:12,159 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:12,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:12,159 INFO L82 PathProgramCache]: Analyzing trace with hash 911586597, now seen corresponding path program 186 times [2021-04-15 02:20:12,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:12,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815438457] [2021-04-15 02:20:12,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:12,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:12,258 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:12,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815438457] [2021-04-15 02:20:12,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557125361] [2021-04-15 02:20:12,258 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:12,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:20:12,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:12,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:20:12,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:12,342 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:12,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:12,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 16 [2021-04-15 02:20:12,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896376525] [2021-04-15 02:20:12,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:20:12,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:12,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:20:12,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:20:12,346 INFO L87 Difference]: Start difference. First operand 2411 states and 6889 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:12,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:12,542 INFO L93 Difference]: Finished difference Result 3194 states and 8791 transitions. [2021-04-15 02:20:12,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:20:12,542 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:20:12,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:12,547 INFO L225 Difference]: With dead ends: 3194 [2021-04-15 02:20:12,547 INFO L226 Difference]: Without dead ends: 3184 [2021-04-15 02:20:12,547 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 189.9ms TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:20:12,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2021-04-15 02:20:12,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 2411. [2021-04-15 02:20:12,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2411 states, 2410 states have (on average 2.857676348547718) internal successors, (6887), 2410 states have internal predecessors, (6887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:12,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2411 states to 2411 states and 6887 transitions. [2021-04-15 02:20:12,582 INFO L78 Accepts]: Start accepts. Automaton has 2411 states and 6887 transitions. Word has length 20 [2021-04-15 02:20:12,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:12,582 INFO L480 AbstractCegarLoop]: Abstraction has 2411 states and 6887 transitions. [2021-04-15 02:20:12,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:12,582 INFO L276 IsEmpty]: Start isEmpty. Operand 2411 states and 6887 transitions. [2021-04-15 02:20:12,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:12,585 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:12,585 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:12,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2021-04-15 02:20:12,785 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:12,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:12,785 INFO L82 PathProgramCache]: Analyzing trace with hash 66615145, now seen corresponding path program 187 times [2021-04-15 02:20:12,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:12,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136493105] [2021-04-15 02:20:12,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:12,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:12,868 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:12,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136493105] [2021-04-15 02:20:12,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089138422] [2021-04-15 02:20:12,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:12,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:20:12,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:12,959 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:12,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:12,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-04-15 02:20:12,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184846406] [2021-04-15 02:20:12,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:20:12,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:12,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:20:12,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:20:12,960 INFO L87 Difference]: Start difference. First operand 2411 states and 6887 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:13,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:13,163 INFO L93 Difference]: Finished difference Result 3215 states and 8812 transitions. [2021-04-15 02:20:13,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:20:13,164 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:20:13,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:13,169 INFO L225 Difference]: With dead ends: 3215 [2021-04-15 02:20:13,169 INFO L226 Difference]: Without dead ends: 3203 [2021-04-15 02:20:13,169 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 199.9ms TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:20:13,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3203 states. [2021-04-15 02:20:13,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3203 to 2417. [2021-04-15 02:20:13,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.857201986754967) internal successors, (6903), 2416 states have internal predecessors, (6903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:13,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 6903 transitions. [2021-04-15 02:20:13,213 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 6903 transitions. Word has length 20 [2021-04-15 02:20:13,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:13,213 INFO L480 AbstractCegarLoop]: Abstraction has 2417 states and 6903 transitions. [2021-04-15 02:20:13,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:13,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 6903 transitions. [2021-04-15 02:20:13,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:13,216 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:13,216 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:13,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable643,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:13,418 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:13,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:13,418 INFO L82 PathProgramCache]: Analyzing trace with hash -357696091, now seen corresponding path program 188 times [2021-04-15 02:20:13,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:13,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689891256] [2021-04-15 02:20:13,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:13,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689891256] [2021-04-15 02:20:13,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381706085] [2021-04-15 02:20:13,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:13,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:13,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:13,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:20:13,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:13,603 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:13,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:13,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-04-15 02:20:13,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878541818] [2021-04-15 02:20:13,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:20:13,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:13,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:20:13,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:20:13,604 INFO L87 Difference]: Start difference. First operand 2417 states and 6903 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:13,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:13,771 INFO L93 Difference]: Finished difference Result 2609 states and 7349 transitions. [2021-04-15 02:20:13,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:20:13,771 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:20:13,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:13,774 INFO L225 Difference]: With dead ends: 2609 [2021-04-15 02:20:13,774 INFO L226 Difference]: Without dead ends: 2602 [2021-04-15 02:20:13,775 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 207.9ms TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:20:13,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2021-04-15 02:20:13,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 2417. [2021-04-15 02:20:13,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.8567880794701987) internal successors, (6902), 2416 states have internal predecessors, (6902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:13,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 6902 transitions. [2021-04-15 02:20:13,802 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 6902 transitions. Word has length 20 [2021-04-15 02:20:13,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:13,802 INFO L480 AbstractCegarLoop]: Abstraction has 2417 states and 6902 transitions. [2021-04-15 02:20:13,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:13,802 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 6902 transitions. [2021-04-15 02:20:13,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:20:13,804 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:13,804 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:14,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable644 [2021-04-15 02:20:14,005 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:14,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:14,005 INFO L82 PathProgramCache]: Analyzing trace with hash 208179366, now seen corresponding path program 189 times [2021-04-15 02:20:14,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:14,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817900566] [2021-04-15 02:20:14,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:14,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:14,058 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:14,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817900566] [2021-04-15 02:20:14,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029805652] [2021-04-15 02:20:14,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:14,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:20:14,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:14,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:20:14,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:14,416 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:20:14,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:14,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:20:17,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:20:17,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:17,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:20:17,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:20:17,397 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:17,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:17,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-04-15 02:20:17,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027216074] [2021-04-15 02:20:17,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:20:17,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:17,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:20:17,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:20:17,398 INFO L87 Difference]: Start difference. First operand 2417 states and 6902 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:17,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:17,663 INFO L93 Difference]: Finished difference Result 2595 states and 7261 transitions. [2021-04-15 02:20:17,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:20:17,663 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:20:17,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:17,667 INFO L225 Difference]: With dead ends: 2595 [2021-04-15 02:20:17,667 INFO L226 Difference]: Without dead ends: 2592 [2021-04-15 02:20:17,667 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 213.1ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:20:17,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2021-04-15 02:20:17,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 2489. [2021-04-15 02:20:17,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2489 states, 2488 states have (on average 2.8589228295819935) internal successors, (7113), 2488 states have internal predecessors, (7113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:17,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2489 states to 2489 states and 7113 transitions. [2021-04-15 02:20:17,699 INFO L78 Accepts]: Start accepts. Automaton has 2489 states and 7113 transitions. Word has length 21 [2021-04-15 02:20:17,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:17,699 INFO L480 AbstractCegarLoop]: Abstraction has 2489 states and 7113 transitions. [2021-04-15 02:20:17,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:17,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2489 states and 7113 transitions. [2021-04-15 02:20:17,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:20:17,701 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:17,702 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:17,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable645 [2021-04-15 02:20:17,902 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:17,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:17,902 INFO L82 PathProgramCache]: Analyzing trace with hash -120892348, now seen corresponding path program 190 times [2021-04-15 02:20:17,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:17,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402812900] [2021-04-15 02:20:17,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:17,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402812900] [2021-04-15 02:20:17,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139632148] [2021-04-15 02:20:17,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:17,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:17,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:17,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:20:17,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:18,297 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:20:18,297 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:18,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:20:19,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:20:19,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:19,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:20:19,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:20:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:19,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:19,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-04-15 02:20:19,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246093919] [2021-04-15 02:20:19,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:20:19,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:19,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:20:19,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:20:19,102 INFO L87 Difference]: Start difference. First operand 2489 states and 7113 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:19,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:19,364 INFO L93 Difference]: Finished difference Result 2702 states and 7537 transitions. [2021-04-15 02:20:19,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:20:19,364 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:20:19,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:19,367 INFO L225 Difference]: With dead ends: 2702 [2021-04-15 02:20:19,368 INFO L226 Difference]: Without dead ends: 2699 [2021-04-15 02:20:19,368 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 217.9ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:20:19,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2021-04-15 02:20:19,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 2548. [2021-04-15 02:20:19,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2548 states, 2547 states have (on average 2.8696505692972125) internal successors, (7309), 2547 states have internal predecessors, (7309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:19,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2548 states to 2548 states and 7309 transitions. [2021-04-15 02:20:19,400 INFO L78 Accepts]: Start accepts. Automaton has 2548 states and 7309 transitions. Word has length 21 [2021-04-15 02:20:19,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:19,400 INFO L480 AbstractCegarLoop]: Abstraction has 2548 states and 7309 transitions. [2021-04-15 02:20:19,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:19,400 INFO L276 IsEmpty]: Start isEmpty. Operand 2548 states and 7309 transitions. [2021-04-15 02:20:19,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:20:19,403 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:19,403 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:19,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1372,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:19,603 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:19,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:19,604 INFO L82 PathProgramCache]: Analyzing trace with hash 670459314, now seen corresponding path program 191 times [2021-04-15 02:20:19,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:19,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270651619] [2021-04-15 02:20:19,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:19,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:19,656 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:20:19,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270651619] [2021-04-15 02:20:19,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137572316] [2021-04-15 02:20:19,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:19,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:20:19,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:19,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:20:19,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:19,995 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:20:19,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:19,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:20:20,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:20:20,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:20,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:20:20,464 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:20:20,471 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:20,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:20,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-04-15 02:20:20,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865528225] [2021-04-15 02:20:20,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:20:20,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:20,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:20:20,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:20:20,472 INFO L87 Difference]: Start difference. First operand 2548 states and 7309 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:20,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:20,708 INFO L93 Difference]: Finished difference Result 2762 states and 7744 transitions. [2021-04-15 02:20:20,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:20:20,708 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:20:20,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:20,712 INFO L225 Difference]: With dead ends: 2762 [2021-04-15 02:20:20,712 INFO L226 Difference]: Without dead ends: 2759 [2021-04-15 02:20:20,712 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 223.0ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:20:20,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2759 states. [2021-04-15 02:20:20,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2759 to 2605. [2021-04-15 02:20:20,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2605 states, 2604 states have (on average 2.883640552995392) internal successors, (7509), 2604 states have internal predecessors, (7509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:20,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2605 states to 2605 states and 7509 transitions. [2021-04-15 02:20:20,775 INFO L78 Accepts]: Start accepts. Automaton has 2605 states and 7509 transitions. Word has length 21 [2021-04-15 02:20:20,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:20,775 INFO L480 AbstractCegarLoop]: Abstraction has 2605 states and 7509 transitions. [2021-04-15 02:20:20,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:20,775 INFO L276 IsEmpty]: Start isEmpty. Operand 2605 states and 7509 transitions. [2021-04-15 02:20:20,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:20:20,778 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:20,778 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:20,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1568 [2021-04-15 02:20:20,980 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:20,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:20,981 INFO L82 PathProgramCache]: Analyzing trace with hash -567442940, now seen corresponding path program 192 times [2021-04-15 02:20:20,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:20,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173278075] [2021-04-15 02:20:20,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:21,039 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:21,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173278075] [2021-04-15 02:20:21,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538372473] [2021-04-15 02:20:21,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:21,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:20:21,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:21,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:20:21,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:21,373 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:20:21,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:21,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:20:22,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:20:22,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:22,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:20:22,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:20:22,379 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:22,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:22,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-04-15 02:20:22,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143793917] [2021-04-15 02:20:22,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:20:22,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:22,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:20:22,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:20:22,380 INFO L87 Difference]: Start difference. First operand 2605 states and 7509 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:22,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:22,772 INFO L93 Difference]: Finished difference Result 2824 states and 7965 transitions. [2021-04-15 02:20:22,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:20:22,773 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:20:22,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:22,778 INFO L225 Difference]: With dead ends: 2824 [2021-04-15 02:20:22,778 INFO L226 Difference]: Without dead ends: 2821 [2021-04-15 02:20:22,778 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 216.9ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:20:22,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2821 states. [2021-04-15 02:20:22,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2821 to 2666. [2021-04-15 02:20:22,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2665 states have (on average 2.900187617260788) internal successors, (7729), 2665 states have internal predecessors, (7729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:22,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 7729 transitions. [2021-04-15 02:20:22,828 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 7729 transitions. Word has length 21 [2021-04-15 02:20:22,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:22,829 INFO L480 AbstractCegarLoop]: Abstraction has 2666 states and 7729 transitions. [2021-04-15 02:20:22,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:22,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 7729 transitions. [2021-04-15 02:20:22,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:20:22,833 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:22,833 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:23,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1759,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:23,057 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:23,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:23,057 INFO L82 PathProgramCache]: Analyzing trace with hash -287707150, now seen corresponding path program 193 times [2021-04-15 02:20:23,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:23,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013815357] [2021-04-15 02:20:23,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:23,111 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:20:23,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013815357] [2021-04-15 02:20:23,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974284782] [2021-04-15 02:20:23,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:23,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:20:23,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:23,435 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:20:23,435 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:23,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:20:23,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:20:23,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:23,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:20:23,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:20:23,915 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:23,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:23,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-04-15 02:20:23,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435315223] [2021-04-15 02:20:23,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:20:23,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:23,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:20:23,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:20:23,916 INFO L87 Difference]: Start difference. First operand 2666 states and 7729 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:24,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:24,110 INFO L93 Difference]: Finished difference Result 2927 states and 8298 transitions. [2021-04-15 02:20:24,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:20:24,111 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:20:24,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:24,115 INFO L225 Difference]: With dead ends: 2927 [2021-04-15 02:20:24,115 INFO L226 Difference]: Without dead ends: 2924 [2021-04-15 02:20:24,115 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 204.2ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:20:24,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2924 states. [2021-04-15 02:20:24,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2924 to 2756. [2021-04-15 02:20:24,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2756 states, 2755 states have (on average 2.9219600725952812) internal successors, (8050), 2755 states have internal predecessors, (8050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:24,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2756 states to 2756 states and 8050 transitions. [2021-04-15 02:20:24,153 INFO L78 Accepts]: Start accepts. Automaton has 2756 states and 8050 transitions. Word has length 21 [2021-04-15 02:20:24,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:24,153 INFO L480 AbstractCegarLoop]: Abstraction has 2756 states and 8050 transitions. [2021-04-15 02:20:24,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:24,153 INFO L276 IsEmpty]: Start isEmpty. Operand 2756 states and 8050 transitions. [2021-04-15 02:20:24,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:20:24,156 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:24,156 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:24,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2107 [2021-04-15 02:20:24,357 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:24,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:24,357 INFO L82 PathProgramCache]: Analyzing trace with hash -205832252, now seen corresponding path program 194 times [2021-04-15 02:20:24,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:24,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59745222] [2021-04-15 02:20:24,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:24,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:24,412 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:24,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59745222] [2021-04-15 02:20:24,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737727568] [2021-04-15 02:20:24,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:24,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:24,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:24,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:20:24,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:24,827 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:20:24,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:24,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:20:25,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:20:25,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:25,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:20:25,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:20:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:25,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:25,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-04-15 02:20:25,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518158038] [2021-04-15 02:20:25,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:20:25,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:25,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:20:25,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:20:25,264 INFO L87 Difference]: Start difference. First operand 2756 states and 8050 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:25,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:25,658 INFO L93 Difference]: Finished difference Result 3020 states and 8621 transitions. [2021-04-15 02:20:25,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:20:25,658 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:20:25,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:25,663 INFO L225 Difference]: With dead ends: 3020 [2021-04-15 02:20:25,663 INFO L226 Difference]: Without dead ends: 3017 [2021-04-15 02:20:25,663 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 231.7ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:20:25,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3017 states. [2021-04-15 02:20:25,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3017 to 2845. [2021-04-15 02:20:25,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2844 states have (on average 2.9433895921237694) internal successors, (8371), 2844 states have internal predecessors, (8371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:25,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 8371 transitions. [2021-04-15 02:20:25,704 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 8371 transitions. Word has length 21 [2021-04-15 02:20:25,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:25,704 INFO L480 AbstractCegarLoop]: Abstraction has 2845 states and 8371 transitions. [2021-04-15 02:20:25,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:25,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 8371 transitions. [2021-04-15 02:20:25,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:20:25,708 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:25,708 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:25,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2270,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:25,908 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:25,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:25,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1962677710, now seen corresponding path program 195 times [2021-04-15 02:20:25,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:25,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109060760] [2021-04-15 02:20:25,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:25,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:25,965 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:20:25,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109060760] [2021-04-15 02:20:25,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327512026] [2021-04-15 02:20:25,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:25,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:20:25,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:25,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:20:25,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:26,302 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:20:26,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:26,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:20:27,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:20:27,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:27,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:20:27,150 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:20:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:27,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:27,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-04-15 02:20:27,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211375079] [2021-04-15 02:20:27,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:20:27,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:27,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:20:27,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:20:27,157 INFO L87 Difference]: Start difference. First operand 2845 states and 8371 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:27,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:27,385 INFO L93 Difference]: Finished difference Result 3164 states and 9122 transitions. [2021-04-15 02:20:27,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:20:27,385 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:20:27,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:27,388 INFO L225 Difference]: With dead ends: 3164 [2021-04-15 02:20:27,389 INFO L226 Difference]: Without dead ends: 3161 [2021-04-15 02:20:27,389 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 219.9ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:20:27,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3161 states. [2021-04-15 02:20:27,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3161 to 3004. [2021-04-15 02:20:27,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3004 states, 3003 states have (on average 2.965700965700966) internal successors, (8906), 3003 states have internal predecessors, (8906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:27,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3004 states to 3004 states and 8906 transitions. [2021-04-15 02:20:27,419 INFO L78 Accepts]: Start accepts. Automaton has 3004 states and 8906 transitions. Word has length 21 [2021-04-15 02:20:27,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:27,419 INFO L480 AbstractCegarLoop]: Abstraction has 3004 states and 8906 transitions. [2021-04-15 02:20:27,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:27,419 INFO L276 IsEmpty]: Start isEmpty. Operand 3004 states and 8906 transitions. [2021-04-15 02:20:27,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:20:27,422 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:27,422 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:27,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2424 [2021-04-15 02:20:27,622 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:27,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:27,622 INFO L82 PathProgramCache]: Analyzing trace with hash -590312060, now seen corresponding path program 196 times [2021-04-15 02:20:27,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:27,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609131282] [2021-04-15 02:20:27,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:27,677 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:27,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609131282] [2021-04-15 02:20:27,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172870546] [2021-04-15 02:20:27,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:27,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:27,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:27,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:20:27,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:28,028 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:20:28,028 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:28,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:20:28,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:20:28,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:28,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:20:28,694 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:20:28,701 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:28,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:28,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-04-15 02:20:28,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499436882] [2021-04-15 02:20:28,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:20:28,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:28,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:20:28,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:20:28,702 INFO L87 Difference]: Start difference. First operand 3004 states and 8906 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:29,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:29,057 INFO L93 Difference]: Finished difference Result 3650 states and 10596 transitions. [2021-04-15 02:20:29,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:20:29,057 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:20:29,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:29,062 INFO L225 Difference]: With dead ends: 3650 [2021-04-15 02:20:29,063 INFO L226 Difference]: Without dead ends: 3647 [2021-04-15 02:20:29,063 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 220.5ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:20:29,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3647 states. [2021-04-15 02:20:29,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3647 to 3491. [2021-04-15 02:20:29,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3491 states, 3490 states have (on average 2.9773638968481375) internal successors, (10391), 3490 states have internal predecessors, (10391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:29,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3491 states to 3491 states and 10391 transitions. [2021-04-15 02:20:29,114 INFO L78 Accepts]: Start accepts. Automaton has 3491 states and 10391 transitions. Word has length 21 [2021-04-15 02:20:29,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:29,114 INFO L480 AbstractCegarLoop]: Abstraction has 3491 states and 10391 transitions. [2021-04-15 02:20:29,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:29,114 INFO L276 IsEmpty]: Start isEmpty. Operand 3491 states and 10391 transitions. [2021-04-15 02:20:29,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:20:29,118 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:29,118 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:29,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2745 [2021-04-15 02:20:29,318 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:29,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:29,319 INFO L82 PathProgramCache]: Analyzing trace with hash -996649870, now seen corresponding path program 197 times [2021-04-15 02:20:29,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:29,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142770444] [2021-04-15 02:20:29,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:29,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:29,375 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:29,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142770444] [2021-04-15 02:20:29,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127455527] [2021-04-15 02:20:29,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:29,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:20:29,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:29,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:20:29,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:29,711 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:20:29,712 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:29,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:20:30,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:20:30,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:30,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:20:30,474 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:20:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:30,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:30,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-04-15 02:20:30,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796821311] [2021-04-15 02:20:30,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:20:30,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:30,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:20:30,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:20:30,482 INFO L87 Difference]: Start difference. First operand 3491 states and 10391 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:30,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:30,746 INFO L93 Difference]: Finished difference Result 4057 states and 11844 transitions. [2021-04-15 02:20:30,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:20:30,746 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:20:30,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:30,751 INFO L225 Difference]: With dead ends: 4057 [2021-04-15 02:20:30,751 INFO L226 Difference]: Without dead ends: 4054 [2021-04-15 02:20:30,751 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 220.9ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:20:30,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4054 states. [2021-04-15 02:20:30,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4054 to 3906. [2021-04-15 02:20:30,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3906 states, 3905 states have (on average 2.9836107554417413) internal successors, (11651), 3905 states have internal predecessors, (11651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:30,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3906 states to 3906 states and 11651 transitions. [2021-04-15 02:20:30,795 INFO L78 Accepts]: Start accepts. Automaton has 3906 states and 11651 transitions. Word has length 21 [2021-04-15 02:20:30,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:30,795 INFO L480 AbstractCegarLoop]: Abstraction has 3906 states and 11651 transitions. [2021-04-15 02:20:30,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:30,795 INFO L276 IsEmpty]: Start isEmpty. Operand 3906 states and 11651 transitions. [2021-04-15 02:20:30,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:30,798 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:30,798 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:30,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2956,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:30,999 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:30,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:30,999 INFO L82 PathProgramCache]: Analyzing trace with hash -836665722, now seen corresponding path program 198 times [2021-04-15 02:20:30,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:30,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242135684] [2021-04-15 02:20:30,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:31,098 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 28 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:31,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242135684] [2021-04-15 02:20:31,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80149637] [2021-04-15 02:20:31,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:31,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:20:31,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:31,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:31,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:31,203 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 36 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:31,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:31,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:20:31,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419730447] [2021-04-15 02:20:31,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:20:31,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:31,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:20:31,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:20:31,204 INFO L87 Difference]: Start difference. First operand 3906 states and 11651 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:31,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:31,422 INFO L93 Difference]: Finished difference Result 4087 states and 11914 transitions. [2021-04-15 02:20:31,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:20:31,423 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:31,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:31,428 INFO L225 Difference]: With dead ends: 4087 [2021-04-15 02:20:31,429 INFO L226 Difference]: Without dead ends: 4087 [2021-04-15 02:20:31,429 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 205.0ms TimeCoverageRelationStatistics Valid=286, Invalid=584, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:20:31,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4087 states. [2021-04-15 02:20:31,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4087 to 3867. [2021-04-15 02:20:31,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3867 states, 3866 states have (on average 2.982152095188826) internal successors, (11529), 3866 states have internal predecessors, (11529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:31,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3867 states to 3867 states and 11529 transitions. [2021-04-15 02:20:31,485 INFO L78 Accepts]: Start accepts. Automaton has 3867 states and 11529 transitions. Word has length 22 [2021-04-15 02:20:31,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:31,485 INFO L480 AbstractCegarLoop]: Abstraction has 3867 states and 11529 transitions. [2021-04-15 02:20:31,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:31,485 INFO L276 IsEmpty]: Start isEmpty. Operand 3867 states and 11529 transitions. [2021-04-15 02:20:31,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:31,489 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:31,489 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:31,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3207 [2021-04-15 02:20:31,690 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:31,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:31,690 INFO L82 PathProgramCache]: Analyzing trace with hash -2113302545, now seen corresponding path program 199 times [2021-04-15 02:20:31,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:31,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099958848] [2021-04-15 02:20:31,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:31,819 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:31,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099958848] [2021-04-15 02:20:31,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752308741] [2021-04-15 02:20:31,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:31,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:31,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:31,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:31,895 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:31,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:31,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:20:31,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015531665] [2021-04-15 02:20:31,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:20:31,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:31,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:20:31,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:20:31,895 INFO L87 Difference]: Start difference. First operand 3867 states and 11529 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:32,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:32,184 INFO L93 Difference]: Finished difference Result 4251 states and 12125 transitions. [2021-04-15 02:20:32,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:20:32,186 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:32,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:32,193 INFO L225 Difference]: With dead ends: 4251 [2021-04-15 02:20:32,193 INFO L226 Difference]: Without dead ends: 4240 [2021-04-15 02:20:32,193 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 261.8ms TimeCoverageRelationStatistics Valid=374, Invalid=748, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 02:20:32,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4240 states. [2021-04-15 02:20:32,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4240 to 3890. [2021-04-15 02:20:32,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3890 states, 3889 states have (on average 2.978657752635639) internal successors, (11584), 3889 states have internal predecessors, (11584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:32,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3890 states to 3890 states and 11584 transitions. [2021-04-15 02:20:32,255 INFO L78 Accepts]: Start accepts. Automaton has 3890 states and 11584 transitions. Word has length 22 [2021-04-15 02:20:32,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:32,255 INFO L480 AbstractCegarLoop]: Abstraction has 3890 states and 11584 transitions. [2021-04-15 02:20:32,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:32,256 INFO L276 IsEmpty]: Start isEmpty. Operand 3890 states and 11584 transitions. [2021-04-15 02:20:32,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:32,260 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:32,260 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:32,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3208,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:32,461 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:32,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:32,461 INFO L82 PathProgramCache]: Analyzing trace with hash 579717254, now seen corresponding path program 200 times [2021-04-15 02:20:32,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:32,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894180542] [2021-04-15 02:20:32,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:32,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:32,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894180542] [2021-04-15 02:20:32,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499989867] [2021-04-15 02:20:32,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:32,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:32,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:32,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:32,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:32,594 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 37 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:32,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:32,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:20:32,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131177395] [2021-04-15 02:20:32,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:32,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:32,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:32,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:32,594 INFO L87 Difference]: Start difference. First operand 3890 states and 11584 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:32,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:32,764 INFO L93 Difference]: Finished difference Result 3929 states and 11639 transitions. [2021-04-15 02:20:32,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:20:32,765 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:32,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:32,771 INFO L225 Difference]: With dead ends: 3929 [2021-04-15 02:20:32,771 INFO L226 Difference]: Without dead ends: 3928 [2021-04-15 02:20:32,771 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:20:32,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3928 states. [2021-04-15 02:20:32,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3928 to 3890. [2021-04-15 02:20:32,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3890 states, 3889 states have (on average 2.978143481614811) internal successors, (11582), 3889 states have internal predecessors, (11582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:32,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3890 states to 3890 states and 11582 transitions. [2021-04-15 02:20:32,827 INFO L78 Accepts]: Start accepts. Automaton has 3890 states and 11582 transitions. Word has length 22 [2021-04-15 02:20:32,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:32,827 INFO L480 AbstractCegarLoop]: Abstraction has 3890 states and 11582 transitions. [2021-04-15 02:20:32,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:32,828 INFO L276 IsEmpty]: Start isEmpty. Operand 3890 states and 11582 transitions. [2021-04-15 02:20:32,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:32,832 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:32,832 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:33,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3209 [2021-04-15 02:20:33,033 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:33,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:33,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1496773607, now seen corresponding path program 201 times [2021-04-15 02:20:33,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:33,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180116528] [2021-04-15 02:20:33,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:33,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:33,100 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:33,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180116528] [2021-04-15 02:20:33,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357132213] [2021-04-15 02:20:33,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:33,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:20:33,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:33,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:33,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:33,171 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:33,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:33,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:20:33,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196960580] [2021-04-15 02:20:33,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:33,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:33,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:33,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:33,172 INFO L87 Difference]: Start difference. First operand 3890 states and 11582 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:33,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:33,255 INFO L93 Difference]: Finished difference Result 4355 states and 12410 transitions. [2021-04-15 02:20:33,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:20:33,256 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:33,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:33,262 INFO L225 Difference]: With dead ends: 4355 [2021-04-15 02:20:33,262 INFO L226 Difference]: Without dead ends: 4355 [2021-04-15 02:20:33,262 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:33,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4355 states. [2021-04-15 02:20:33,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4355 to 3867. [2021-04-15 02:20:33,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3867 states, 3866 states have (on average 2.9733574754267975) internal successors, (11495), 3866 states have internal predecessors, (11495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:33,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3867 states to 3867 states and 11495 transitions. [2021-04-15 02:20:33,323 INFO L78 Accepts]: Start accepts. Automaton has 3867 states and 11495 transitions. Word has length 22 [2021-04-15 02:20:33,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:33,323 INFO L480 AbstractCegarLoop]: Abstraction has 3867 states and 11495 transitions. [2021-04-15 02:20:33,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:33,323 INFO L276 IsEmpty]: Start isEmpty. Operand 3867 states and 11495 transitions. [2021-04-15 02:20:33,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:33,328 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:33,328 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:33,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3210 [2021-04-15 02:20:33,528 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:33,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:33,529 INFO L82 PathProgramCache]: Analyzing trace with hash -374385774, now seen corresponding path program 202 times [2021-04-15 02:20:33,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:33,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276980043] [2021-04-15 02:20:33,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:33,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:33,613 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:33,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276980043] [2021-04-15 02:20:33,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691368929] [2021-04-15 02:20:33,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:33,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:33,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:33,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:33,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:33,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:33,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:20:33,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902997545] [2021-04-15 02:20:33,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:33,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:33,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:33,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:33,693 INFO L87 Difference]: Start difference. First operand 3867 states and 11495 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:33,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:33,818 INFO L93 Difference]: Finished difference Result 4245 states and 12197 transitions. [2021-04-15 02:20:33,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:20:33,818 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:33,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:33,823 INFO L225 Difference]: With dead ends: 4245 [2021-04-15 02:20:33,824 INFO L226 Difference]: Without dead ends: 4245 [2021-04-15 02:20:33,824 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 122.6ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:20:33,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4245 states. [2021-04-15 02:20:33,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4245 to 3908. [2021-04-15 02:20:33,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3908 states, 3907 states have (on average 2.975172766828769) internal successors, (11624), 3907 states have internal predecessors, (11624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:33,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3908 states to 3908 states and 11624 transitions. [2021-04-15 02:20:33,868 INFO L78 Accepts]: Start accepts. Automaton has 3908 states and 11624 transitions. Word has length 22 [2021-04-15 02:20:33,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:33,868 INFO L480 AbstractCegarLoop]: Abstraction has 3908 states and 11624 transitions. [2021-04-15 02:20:33,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:33,868 INFO L276 IsEmpty]: Start isEmpty. Operand 3908 states and 11624 transitions. [2021-04-15 02:20:33,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:33,871 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:33,871 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:34,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3211,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:34,072 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:34,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:34,072 INFO L82 PathProgramCache]: Analyzing trace with hash 570376209, now seen corresponding path program 203 times [2021-04-15 02:20:34,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:34,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782812878] [2021-04-15 02:20:34,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:34,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:34,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782812878] [2021-04-15 02:20:34,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914409868] [2021-04-15 02:20:34,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:34,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:20:34,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:34,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:34,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:34,189 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:34,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:34,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:20:34,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261080398] [2021-04-15 02:20:34,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:34,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:34,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:34,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:34,189 INFO L87 Difference]: Start difference. First operand 3908 states and 11624 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:34,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:34,348 INFO L93 Difference]: Finished difference Result 4249 states and 12137 transitions. [2021-04-15 02:20:34,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:20:34,349 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:34,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:34,355 INFO L225 Difference]: With dead ends: 4249 [2021-04-15 02:20:34,355 INFO L226 Difference]: Without dead ends: 4247 [2021-04-15 02:20:34,356 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 110.8ms TimeCoverageRelationStatistics Valid=175, Invalid=287, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:20:34,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4247 states. [2021-04-15 02:20:34,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4247 to 3918. [2021-04-15 02:20:34,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 2.976257339800868) internal successors, (11658), 3917 states have internal predecessors, (11658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:34,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 11658 transitions. [2021-04-15 02:20:34,438 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 11658 transitions. Word has length 22 [2021-04-15 02:20:34,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:34,438 INFO L480 AbstractCegarLoop]: Abstraction has 3918 states and 11658 transitions. [2021-04-15 02:20:34,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:34,438 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 11658 transitions. [2021-04-15 02:20:34,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:34,443 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:34,443 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:34,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3212,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:34,643 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:34,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:34,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1371068916, now seen corresponding path program 204 times [2021-04-15 02:20:34,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:34,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021149736] [2021-04-15 02:20:34,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:34,709 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:34,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021149736] [2021-04-15 02:20:34,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914354554] [2021-04-15 02:20:34,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:34,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:20:34,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:34,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:34,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:34,773 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:34,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:34,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:20:34,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822036228] [2021-04-15 02:20:34,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:34,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:34,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:34,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:34,773 INFO L87 Difference]: Start difference. First operand 3918 states and 11658 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:34,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:34,948 INFO L93 Difference]: Finished difference Result 4124 states and 11966 transitions. [2021-04-15 02:20:34,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:20:34,949 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:34,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:34,955 INFO L225 Difference]: With dead ends: 4124 [2021-04-15 02:20:34,955 INFO L226 Difference]: Without dead ends: 4122 [2021-04-15 02:20:34,955 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 115.4ms TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:20:34,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4122 states. [2021-04-15 02:20:35,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4122 to 3900. [2021-04-15 02:20:35,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3900 states, 3899 states have (on average 2.9746088740702743) internal successors, (11598), 3899 states have internal predecessors, (11598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:35,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3900 states to 3900 states and 11598 transitions. [2021-04-15 02:20:35,015 INFO L78 Accepts]: Start accepts. Automaton has 3900 states and 11598 transitions. Word has length 22 [2021-04-15 02:20:35,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:35,015 INFO L480 AbstractCegarLoop]: Abstraction has 3900 states and 11598 transitions. [2021-04-15 02:20:35,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:35,015 INFO L276 IsEmpty]: Start isEmpty. Operand 3900 states and 11598 transitions. [2021-04-15 02:20:35,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:35,019 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:35,019 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:35,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3213,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:35,220 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:35,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:35,220 INFO L82 PathProgramCache]: Analyzing trace with hash -2006842027, now seen corresponding path program 205 times [2021-04-15 02:20:35,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:35,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122745404] [2021-04-15 02:20:35,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:35,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122745404] [2021-04-15 02:20:35,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553860941] [2021-04-15 02:20:35,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:35,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:35,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:35,350 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:35,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:35,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:20:35,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703069547] [2021-04-15 02:20:35,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:35,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:35,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:35,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:35,351 INFO L87 Difference]: Start difference. First operand 3900 states and 11598 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:35,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:35,435 INFO L93 Difference]: Finished difference Result 4352 states and 12338 transitions. [2021-04-15 02:20:35,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:20:35,435 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:35,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:35,442 INFO L225 Difference]: With dead ends: 4352 [2021-04-15 02:20:35,442 INFO L226 Difference]: Without dead ends: 4352 [2021-04-15 02:20:35,442 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:35,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4352 states. [2021-04-15 02:20:35,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4352 to 3904. [2021-04-15 02:20:35,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3904 states, 3903 states have (on average 2.9741224698949527) internal successors, (11608), 3903 states have internal predecessors, (11608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:35,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3904 states to 3904 states and 11608 transitions. [2021-04-15 02:20:35,506 INFO L78 Accepts]: Start accepts. Automaton has 3904 states and 11608 transitions. Word has length 22 [2021-04-15 02:20:35,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:35,506 INFO L480 AbstractCegarLoop]: Abstraction has 3904 states and 11608 transitions. [2021-04-15 02:20:35,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:35,506 INFO L276 IsEmpty]: Start isEmpty. Operand 3904 states and 11608 transitions. [2021-04-15 02:20:35,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:35,511 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:35,511 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:35,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3214 [2021-04-15 02:20:35,712 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:35,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:35,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1213285072, now seen corresponding path program 206 times [2021-04-15 02:20:35,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:35,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304294140] [2021-04-15 02:20:35,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:35,778 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:35,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304294140] [2021-04-15 02:20:35,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222388730] [2021-04-15 02:20:35,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:35,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:35,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:35,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:35,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:35,845 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:35,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:35,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:20:35,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504860050] [2021-04-15 02:20:35,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:35,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:35,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:35,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:35,846 INFO L87 Difference]: Start difference. First operand 3904 states and 11608 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:36,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:36,043 INFO L93 Difference]: Finished difference Result 4085 states and 11883 transitions. [2021-04-15 02:20:36,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:20:36,044 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:36,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:36,050 INFO L225 Difference]: With dead ends: 4085 [2021-04-15 02:20:36,050 INFO L226 Difference]: Without dead ends: 4079 [2021-04-15 02:20:36,050 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 129.8ms TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:20:36,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4079 states. [2021-04-15 02:20:36,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4079 to 3861. [2021-04-15 02:20:36,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3861 states, 3860 states have (on average 2.978238341968912) internal successors, (11496), 3860 states have internal predecessors, (11496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:36,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3861 states to 3861 states and 11496 transitions. [2021-04-15 02:20:36,105 INFO L78 Accepts]: Start accepts. Automaton has 3861 states and 11496 transitions. Word has length 22 [2021-04-15 02:20:36,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:36,106 INFO L480 AbstractCegarLoop]: Abstraction has 3861 states and 11496 transitions. [2021-04-15 02:20:36,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:36,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3861 states and 11496 transitions. [2021-04-15 02:20:36,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:36,110 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:36,110 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:36,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3215,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:36,311 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:36,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:36,311 INFO L82 PathProgramCache]: Analyzing trace with hash 559077935, now seen corresponding path program 207 times [2021-04-15 02:20:36,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:36,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015705351] [2021-04-15 02:20:36,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:36,375 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:36,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015705351] [2021-04-15 02:20:36,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487824491] [2021-04-15 02:20:36,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:36,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:20:36,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:36,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:36,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:36,451 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:36,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:36,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:20:36,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857473270] [2021-04-15 02:20:36,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:36,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:36,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:36,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:36,452 INFO L87 Difference]: Start difference. First operand 3861 states and 11496 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:36,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:36,551 INFO L93 Difference]: Finished difference Result 4587 states and 12943 transitions. [2021-04-15 02:20:36,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:20:36,551 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:36,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:36,557 INFO L225 Difference]: With dead ends: 4587 [2021-04-15 02:20:36,558 INFO L226 Difference]: Without dead ends: 4587 [2021-04-15 02:20:36,558 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:20:36,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4587 states. [2021-04-15 02:20:36,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4587 to 3836. [2021-04-15 02:20:36,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3836 states, 3835 states have (on average 2.9734028683181224) internal successors, (11403), 3835 states have internal predecessors, (11403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:36,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3836 states to 3836 states and 11403 transitions. [2021-04-15 02:20:36,618 INFO L78 Accepts]: Start accepts. Automaton has 3836 states and 11403 transitions. Word has length 22 [2021-04-15 02:20:36,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:36,618 INFO L480 AbstractCegarLoop]: Abstraction has 3836 states and 11403 transitions. [2021-04-15 02:20:36,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:36,618 INFO L276 IsEmpty]: Start isEmpty. Operand 3836 states and 11403 transitions. [2021-04-15 02:20:36,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:36,622 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:36,622 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:36,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3216 [2021-04-15 02:20:36,823 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:36,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:36,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1612288028, now seen corresponding path program 208 times [2021-04-15 02:20:36,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:36,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367259728] [2021-04-15 02:20:36,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:36,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367259728] [2021-04-15 02:20:36,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055985997] [2021-04-15 02:20:36,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:36,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:36,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:36,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:36,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:36,949 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:36,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:36,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:20:36,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643133429] [2021-04-15 02:20:36,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:36,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:36,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:36,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:36,950 INFO L87 Difference]: Start difference. First operand 3836 states and 11403 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:37,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:37,064 INFO L93 Difference]: Finished difference Result 4225 states and 12107 transitions. [2021-04-15 02:20:37,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:20:37,064 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:37,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:37,070 INFO L225 Difference]: With dead ends: 4225 [2021-04-15 02:20:37,070 INFO L226 Difference]: Without dead ends: 4225 [2021-04-15 02:20:37,070 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:20:37,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4225 states. [2021-04-15 02:20:37,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4225 to 3857. [2021-04-15 02:20:37,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3857 states, 3856 states have (on average 2.975103734439834) internal successors, (11472), 3856 states have internal predecessors, (11472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:37,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3857 states to 3857 states and 11472 transitions. [2021-04-15 02:20:37,116 INFO L78 Accepts]: Start accepts. Automaton has 3857 states and 11472 transitions. Word has length 22 [2021-04-15 02:20:37,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:37,117 INFO L480 AbstractCegarLoop]: Abstraction has 3857 states and 11472 transitions. [2021-04-15 02:20:37,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:37,117 INFO L276 IsEmpty]: Start isEmpty. Operand 3857 states and 11472 transitions. [2021-04-15 02:20:37,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:37,120 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:37,120 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:37,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3217 [2021-04-15 02:20:37,320 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:37,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:37,320 INFO L82 PathProgramCache]: Analyzing trace with hash -667526045, now seen corresponding path program 209 times [2021-04-15 02:20:37,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:37,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803820265] [2021-04-15 02:20:37,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:37,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:37,373 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:37,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803820265] [2021-04-15 02:20:37,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440635489] [2021-04-15 02:20:37,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:37,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:20:37,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:37,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:37,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:37,431 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:37,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:37,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:20:37,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092885033] [2021-04-15 02:20:37,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:37,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:37,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:37,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:37,432 INFO L87 Difference]: Start difference. First operand 3857 states and 11472 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:37,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:37,597 INFO L93 Difference]: Finished difference Result 4205 states and 11997 transitions. [2021-04-15 02:20:37,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:20:37,598 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:37,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:37,602 INFO L225 Difference]: With dead ends: 4205 [2021-04-15 02:20:37,602 INFO L226 Difference]: Without dead ends: 4203 [2021-04-15 02:20:37,602 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:20:37,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4203 states. [2021-04-15 02:20:37,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4203 to 3869. [2021-04-15 02:20:37,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3869 states, 3868 states have (on average 2.9762150982419855) internal successors, (11512), 3868 states have internal predecessors, (11512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:37,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3869 states to 3869 states and 11512 transitions. [2021-04-15 02:20:37,661 INFO L78 Accepts]: Start accepts. Automaton has 3869 states and 11512 transitions. Word has length 22 [2021-04-15 02:20:37,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:37,661 INFO L480 AbstractCegarLoop]: Abstraction has 3869 states and 11512 transitions. [2021-04-15 02:20:37,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:37,661 INFO L276 IsEmpty]: Start isEmpty. Operand 3869 states and 11512 transitions. [2021-04-15 02:20:37,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:37,667 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:37,667 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:37,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3218,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:37,881 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:37,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:37,881 INFO L82 PathProgramCache]: Analyzing trace with hash 133166662, now seen corresponding path program 210 times [2021-04-15 02:20:37,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:37,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277769640] [2021-04-15 02:20:37,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:37,965 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:37,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277769640] [2021-04-15 02:20:37,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851513664] [2021-04-15 02:20:37,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:37,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:20:37,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:37,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:37,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:38,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:38,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:20:38,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44672155] [2021-04-15 02:20:38,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:38,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:38,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:38,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:38,040 INFO L87 Difference]: Start difference. First operand 3869 states and 11512 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:38,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:38,224 INFO L93 Difference]: Finished difference Result 4090 states and 11844 transitions. [2021-04-15 02:20:38,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:20:38,224 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:38,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:38,230 INFO L225 Difference]: With dead ends: 4090 [2021-04-15 02:20:38,230 INFO L226 Difference]: Without dead ends: 4088 [2021-04-15 02:20:38,230 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:20:38,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4088 states. [2021-04-15 02:20:38,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4088 to 3838. [2021-04-15 02:20:38,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 2.973416731821736) internal successors, (11409), 3837 states have internal predecessors, (11409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:38,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 11409 transitions. [2021-04-15 02:20:38,287 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 11409 transitions. Word has length 22 [2021-04-15 02:20:38,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:38,287 INFO L480 AbstractCegarLoop]: Abstraction has 3838 states and 11409 transitions. [2021-04-15 02:20:38,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:38,288 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 11409 transitions. [2021-04-15 02:20:38,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:38,292 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:38,292 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:38,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3219 [2021-04-15 02:20:38,493 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:38,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:38,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1050223015, now seen corresponding path program 211 times [2021-04-15 02:20:38,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:38,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440997444] [2021-04-15 02:20:38,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:38,551 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:38,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440997444] [2021-04-15 02:20:38,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579369240] [2021-04-15 02:20:38,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:38,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:38,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:38,618 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:38,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:38,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:20:38,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533690389] [2021-04-15 02:20:38,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:38,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:38,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:38,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:38,619 INFO L87 Difference]: Start difference. First operand 3838 states and 11409 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:38,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:38,697 INFO L93 Difference]: Finished difference Result 4172 states and 11863 transitions. [2021-04-15 02:20:38,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:20:38,697 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:38,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:38,702 INFO L225 Difference]: With dead ends: 4172 [2021-04-15 02:20:38,702 INFO L226 Difference]: Without dead ends: 4172 [2021-04-15 02:20:38,702 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:38,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2021-04-15 02:20:38,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 3828. [2021-04-15 02:20:38,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3827 states have (on average 2.9699503527567286) internal successors, (11366), 3827 states have internal predecessors, (11366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:38,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 11366 transitions. [2021-04-15 02:20:38,761 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 11366 transitions. Word has length 22 [2021-04-15 02:20:38,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:38,761 INFO L480 AbstractCegarLoop]: Abstraction has 3828 states and 11366 transitions. [2021-04-15 02:20:38,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:38,761 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 11366 transitions. [2021-04-15 02:20:38,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:38,766 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:38,766 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:38,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3220,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:38,967 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:38,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:38,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1843779970, now seen corresponding path program 212 times [2021-04-15 02:20:38,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:38,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585837625] [2021-04-15 02:20:38,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:39,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585837625] [2021-04-15 02:20:39,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136573262] [2021-04-15 02:20:39,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:39,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:39,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:39,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:39,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:39,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:39,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:20:39,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952452773] [2021-04-15 02:20:39,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:39,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:39,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:39,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:39,098 INFO L87 Difference]: Start difference. First operand 3828 states and 11366 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:39,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:39,294 INFO L93 Difference]: Finished difference Result 4046 states and 11697 transitions. [2021-04-15 02:20:39,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:20:39,294 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:39,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:39,300 INFO L225 Difference]: With dead ends: 4046 [2021-04-15 02:20:39,300 INFO L226 Difference]: Without dead ends: 4044 [2021-04-15 02:20:39,300 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 124.6ms TimeCoverageRelationStatistics Valid=195, Invalid=357, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:20:39,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4044 states. [2021-04-15 02:20:39,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4044 to 3828. [2021-04-15 02:20:39,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3827 states have (on average 2.969427750195976) internal successors, (11364), 3827 states have internal predecessors, (11364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:39,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 11364 transitions. [2021-04-15 02:20:39,355 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 11364 transitions. Word has length 22 [2021-04-15 02:20:39,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:39,355 INFO L480 AbstractCegarLoop]: Abstraction has 3828 states and 11364 transitions. [2021-04-15 02:20:39,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:39,355 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 11364 transitions. [2021-04-15 02:20:39,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:39,359 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:39,359 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:39,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3221 [2021-04-15 02:20:39,560 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:39,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:39,560 INFO L82 PathProgramCache]: Analyzing trace with hash -678824319, now seen corresponding path program 213 times [2021-04-15 02:20:39,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:39,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722853157] [2021-04-15 02:20:39,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:39,623 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:39,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722853157] [2021-04-15 02:20:39,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687358957] [2021-04-15 02:20:39,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:39,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:20:39,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:39,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:39,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:39,693 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:39,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:39,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:20:39,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365818094] [2021-04-15 02:20:39,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:39,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:39,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:39,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:39,694 INFO L87 Difference]: Start difference. First operand 3828 states and 11364 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:39,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:39,779 INFO L93 Difference]: Finished difference Result 4424 states and 12469 transitions. [2021-04-15 02:20:39,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:20:39,780 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:39,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:39,784 INFO L225 Difference]: With dead ends: 4424 [2021-04-15 02:20:39,784 INFO L226 Difference]: Without dead ends: 4424 [2021-04-15 02:20:39,784 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:20:39,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4424 states. [2021-04-15 02:20:39,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4424 to 3838. [2021-04-15 02:20:39,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 2.9689861871253584) internal successors, (11392), 3837 states have internal predecessors, (11392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:39,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 11392 transitions. [2021-04-15 02:20:39,829 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 11392 transitions. Word has length 22 [2021-04-15 02:20:39,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:39,829 INFO L480 AbstractCegarLoop]: Abstraction has 3838 states and 11392 transitions. [2021-04-15 02:20:39,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:39,829 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 11392 transitions. [2021-04-15 02:20:39,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:39,833 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:39,833 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:40,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3222,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:40,033 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:40,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:40,033 INFO L82 PathProgramCache]: Analyzing trace with hash -961782330, now seen corresponding path program 214 times [2021-04-15 02:20:40,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:40,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219429467] [2021-04-15 02:20:40,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:40,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:40,098 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:40,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219429467] [2021-04-15 02:20:40,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834458770] [2021-04-15 02:20:40,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:40,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:40,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:40,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:40,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:40,154 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:40,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:40,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:20:40,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062416741] [2021-04-15 02:20:40,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:40,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:40,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:40,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:40,155 INFO L87 Difference]: Start difference. First operand 3838 states and 11392 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:40,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:40,330 INFO L93 Difference]: Finished difference Result 4109 states and 11999 transitions. [2021-04-15 02:20:40,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:20:40,331 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:40,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:40,337 INFO L225 Difference]: With dead ends: 4109 [2021-04-15 02:20:40,337 INFO L226 Difference]: Without dead ends: 4106 [2021-04-15 02:20:40,338 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:20:40,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2021-04-15 02:20:40,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 3841. [2021-04-15 02:20:40,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3841 states, 3840 states have (on average 2.968489583333333) internal successors, (11399), 3840 states have internal predecessors, (11399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:40,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3841 states to 3841 states and 11399 transitions. [2021-04-15 02:20:40,395 INFO L78 Accepts]: Start accepts. Automaton has 3841 states and 11399 transitions. Word has length 22 [2021-04-15 02:20:40,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:40,395 INFO L480 AbstractCegarLoop]: Abstraction has 3841 states and 11399 transitions. [2021-04-15 02:20:40,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:40,395 INFO L276 IsEmpty]: Start isEmpty. Operand 3841 states and 11399 transitions. [2021-04-15 02:20:40,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:40,400 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:40,400 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:40,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3223,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:40,600 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:40,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:40,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1555283175, now seen corresponding path program 215 times [2021-04-15 02:20:40,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:40,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675135392] [2021-04-15 02:20:40,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:40,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:40,705 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:40,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675135392] [2021-04-15 02:20:40,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158625360] [2021-04-15 02:20:40,705 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:40,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:20:40,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:40,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:40,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:40,788 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:40,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:40,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:20:40,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806054606] [2021-04-15 02:20:40,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:40,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:40,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:40,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:40,789 INFO L87 Difference]: Start difference. First operand 3841 states and 11399 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:40,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:40,959 INFO L93 Difference]: Finished difference Result 5862 states and 16951 transitions. [2021-04-15 02:20:40,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:20:40,960 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:40,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:40,972 INFO L225 Difference]: With dead ends: 5862 [2021-04-15 02:20:40,972 INFO L226 Difference]: Without dead ends: 5862 [2021-04-15 02:20:40,972 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:20:40,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5862 states. [2021-04-15 02:20:41,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5862 to 5031. [2021-04-15 02:20:41,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5031 states, 5030 states have (on average 3.0290258449304175) internal successors, (15236), 5030 states have internal predecessors, (15236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:41,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5031 states to 5031 states and 15236 transitions. [2021-04-15 02:20:41,085 INFO L78 Accepts]: Start accepts. Automaton has 5031 states and 15236 transitions. Word has length 22 [2021-04-15 02:20:41,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:41,086 INFO L480 AbstractCegarLoop]: Abstraction has 5031 states and 15236 transitions. [2021-04-15 02:20:41,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:41,086 INFO L276 IsEmpty]: Start isEmpty. Operand 5031 states and 15236 transitions. [2021-04-15 02:20:41,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:41,094 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:41,094 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:41,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3224,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:41,318 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:41,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:41,318 INFO L82 PathProgramCache]: Analyzing trace with hash -69053073, now seen corresponding path program 216 times [2021-04-15 02:20:41,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:41,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381462134] [2021-04-15 02:20:41,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:41,399 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:20:41,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381462134] [2021-04-15 02:20:41,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528296572] [2021-04-15 02:20:41,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:41,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:20:41,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:41,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:41,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:41,469 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:20:41,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:41,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:20:41,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608619062] [2021-04-15 02:20:41,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:20:41,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:41,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:20:41,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:41,470 INFO L87 Difference]: Start difference. First operand 5031 states and 15236 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:41,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:41,650 INFO L93 Difference]: Finished difference Result 5380 states and 15831 transitions. [2021-04-15 02:20:41,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:20:41,650 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:41,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:41,659 INFO L225 Difference]: With dead ends: 5380 [2021-04-15 02:20:41,659 INFO L226 Difference]: Without dead ends: 5376 [2021-04-15 02:20:41,659 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 139.6ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:20:41,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5376 states. [2021-04-15 02:20:41,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5376 to 5084. [2021-04-15 02:20:41,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5084 states, 5083 states have (on average 3.0334448160535117) internal successors, (15419), 5083 states have internal predecessors, (15419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:41,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5084 states to 5084 states and 15419 transitions. [2021-04-15 02:20:41,760 INFO L78 Accepts]: Start accepts. Automaton has 5084 states and 15419 transitions. Word has length 22 [2021-04-15 02:20:41,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:41,760 INFO L480 AbstractCegarLoop]: Abstraction has 5084 states and 15419 transitions. [2021-04-15 02:20:41,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:41,760 INFO L276 IsEmpty]: Start isEmpty. Operand 5084 states and 15419 transitions. [2021-04-15 02:20:41,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:41,766 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:41,767 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:41,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3225,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:41,967 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:41,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:41,967 INFO L82 PathProgramCache]: Analyzing trace with hash -175700274, now seen corresponding path program 217 times [2021-04-15 02:20:41,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:41,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213262130] [2021-04-15 02:20:41,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:42,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213262130] [2021-04-15 02:20:42,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382618366] [2021-04-15 02:20:42,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:42,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:42,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:42,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:42,105 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:42,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:42,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:20:42,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401034847] [2021-04-15 02:20:42,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:42,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:42,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:42,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:42,106 INFO L87 Difference]: Start difference. First operand 5084 states and 15419 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:42,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:42,314 INFO L93 Difference]: Finished difference Result 5286 states and 15759 transitions. [2021-04-15 02:20:42,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:20:42,315 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:42,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:42,322 INFO L225 Difference]: With dead ends: 5286 [2021-04-15 02:20:42,323 INFO L226 Difference]: Without dead ends: 5280 [2021-04-15 02:20:42,323 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 135.9ms TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:20:42,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5280 states. [2021-04-15 02:20:42,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5280 to 5075. [2021-04-15 02:20:42,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5075 states, 5074 states have (on average 3.034095388253843) internal successors, (15395), 5074 states have internal predecessors, (15395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:42,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5075 states to 5075 states and 15395 transitions. [2021-04-15 02:20:42,413 INFO L78 Accepts]: Start accepts. Automaton has 5075 states and 15395 transitions. Word has length 22 [2021-04-15 02:20:42,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:42,413 INFO L480 AbstractCegarLoop]: Abstraction has 5075 states and 15395 transitions. [2021-04-15 02:20:42,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:42,414 INFO L276 IsEmpty]: Start isEmpty. Operand 5075 states and 15395 transitions. [2021-04-15 02:20:42,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:42,420 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:42,420 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:42,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3226 [2021-04-15 02:20:42,620 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:42,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:42,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1953602065, now seen corresponding path program 218 times [2021-04-15 02:20:42,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:42,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863222803] [2021-04-15 02:20:42,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:42,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:42,682 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:42,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863222803] [2021-04-15 02:20:42,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19436033] [2021-04-15 02:20:42,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:42,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:42,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:42,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:42,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:42,744 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:42,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:42,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:20:42,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69365413] [2021-04-15 02:20:42,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:42,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:42,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:42,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:42,745 INFO L87 Difference]: Start difference. First operand 5075 states and 15395 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:42,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:42,854 INFO L93 Difference]: Finished difference Result 6136 states and 17834 transitions. [2021-04-15 02:20:42,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:20:42,854 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:42,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:42,861 INFO L225 Difference]: With dead ends: 6136 [2021-04-15 02:20:42,861 INFO L226 Difference]: Without dead ends: 6136 [2021-04-15 02:20:42,861 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:20:42,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6136 states. [2021-04-15 02:20:42,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6136 to 3901. [2021-04-15 02:20:42,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 2.9856410256410255) internal successors, (11644), 3900 states have internal predecessors, (11644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:42,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 11644 transitions. [2021-04-15 02:20:42,916 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 11644 transitions. Word has length 22 [2021-04-15 02:20:42,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:42,917 INFO L480 AbstractCegarLoop]: Abstraction has 3901 states and 11644 transitions. [2021-04-15 02:20:42,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:42,917 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 11644 transitions. [2021-04-15 02:20:42,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:42,920 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:42,920 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:43,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3227,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:43,121 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:43,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:43,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1332552238, now seen corresponding path program 219 times [2021-04-15 02:20:43,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:43,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452140799] [2021-04-15 02:20:43,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:43,180 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:43,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452140799] [2021-04-15 02:20:43,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989422909] [2021-04-15 02:20:43,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:43,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:20:43,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:43,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 02:20:43,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 02:20:43,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:43,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-04-15 02:20:43,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65681530] [2021-04-15 02:20:43,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:20:43,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:43,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:20:43,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:20:43,335 INFO L87 Difference]: Start difference. First operand 3901 states and 11644 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:44,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:44,741 INFO L93 Difference]: Finished difference Result 9069 states and 26193 transitions. [2021-04-15 02:20:44,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-04-15 02:20:44,741 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:44,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:44,756 INFO L225 Difference]: With dead ends: 9069 [2021-04-15 02:20:44,756 INFO L226 Difference]: Without dead ends: 9055 [2021-04-15 02:20:44,757 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3104 ImplicationChecksByTransitivity, 1060.1ms TimeCoverageRelationStatistics Valid=1057, Invalid=8255, Unknown=0, NotChecked=0, Total=9312 [2021-04-15 02:20:44,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9055 states. [2021-04-15 02:20:44,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9055 to 5387. [2021-04-15 02:20:44,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5387 states, 5386 states have (on average 2.9433717044188636) internal successors, (15853), 5386 states have internal predecessors, (15853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:44,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5387 states to 5387 states and 15853 transitions. [2021-04-15 02:20:44,882 INFO L78 Accepts]: Start accepts. Automaton has 5387 states and 15853 transitions. Word has length 22 [2021-04-15 02:20:44,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:44,882 INFO L480 AbstractCegarLoop]: Abstraction has 5387 states and 15853 transitions. [2021-04-15 02:20:44,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:44,882 INFO L276 IsEmpty]: Start isEmpty. Operand 5387 states and 15853 transitions. [2021-04-15 02:20:44,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:44,889 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:44,889 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:45,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3228,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:45,093 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:45,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:45,093 INFO L82 PathProgramCache]: Analyzing trace with hash -387790255, now seen corresponding path program 220 times [2021-04-15 02:20:45,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:45,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609911031] [2021-04-15 02:20:45,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:45,151 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:45,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609911031] [2021-04-15 02:20:45,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097375317] [2021-04-15 02:20:45,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:45,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:45,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:45,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:45,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:45,215 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:45,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:45,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:20:45,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679276431] [2021-04-15 02:20:45,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:45,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:45,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:45,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:45,216 INFO L87 Difference]: Start difference. First operand 5387 states and 15853 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:45,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:45,420 INFO L93 Difference]: Finished difference Result 5771 states and 16395 transitions. [2021-04-15 02:20:45,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:20:45,421 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:45,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:45,429 INFO L225 Difference]: With dead ends: 5771 [2021-04-15 02:20:45,429 INFO L226 Difference]: Without dead ends: 5767 [2021-04-15 02:20:45,429 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=173, Invalid=289, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:20:45,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5767 states. [2021-04-15 02:20:45,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5767 to 5367. [2021-04-15 02:20:45,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5367 states, 5366 states have (on average 2.9403652627655608) internal successors, (15778), 5366 states have internal predecessors, (15778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:45,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5367 states to 5367 states and 15778 transitions. [2021-04-15 02:20:45,512 INFO L78 Accepts]: Start accepts. Automaton has 5367 states and 15778 transitions. Word has length 22 [2021-04-15 02:20:45,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:45,513 INFO L480 AbstractCegarLoop]: Abstraction has 5367 states and 15778 transitions. [2021-04-15 02:20:45,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:45,513 INFO L276 IsEmpty]: Start isEmpty. Operand 5367 states and 15778 transitions. [2021-04-15 02:20:45,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:45,518 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:45,518 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:45,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3229 [2021-04-15 02:20:45,719 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:45,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:45,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1329958805, now seen corresponding path program 221 times [2021-04-15 02:20:45,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:45,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016619606] [2021-04-15 02:20:45,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:45,769 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:45,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016619606] [2021-04-15 02:20:45,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722017959] [2021-04-15 02:20:45,770 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:45,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:20:45,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:45,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:45,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:45,834 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:45,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:45,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:20:45,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719694260] [2021-04-15 02:20:45,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:45,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:45,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:45,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:45,835 INFO L87 Difference]: Start difference. First operand 5367 states and 15778 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:45,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:45,910 INFO L93 Difference]: Finished difference Result 5976 states and 16857 transitions. [2021-04-15 02:20:45,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:20:45,910 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:45,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:45,916 INFO L225 Difference]: With dead ends: 5976 [2021-04-15 02:20:45,916 INFO L226 Difference]: Without dead ends: 5976 [2021-04-15 02:20:45,916 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:45,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5976 states. [2021-04-15 02:20:45,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5976 to 5368. [2021-04-15 02:20:45,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5368 states, 5367 states have (on average 2.9381404881684365) internal successors, (15769), 5367 states have internal predecessors, (15769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:45,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5368 states to 5368 states and 15769 transitions. [2021-04-15 02:20:45,984 INFO L78 Accepts]: Start accepts. Automaton has 5368 states and 15769 transitions. Word has length 22 [2021-04-15 02:20:45,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:45,984 INFO L480 AbstractCegarLoop]: Abstraction has 5368 states and 15769 transitions. [2021-04-15 02:20:45,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:45,984 INFO L276 IsEmpty]: Start isEmpty. Operand 5368 states and 15769 transitions. [2021-04-15 02:20:45,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:45,989 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:45,989 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:46,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3230,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:46,189 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:46,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:46,190 INFO L82 PathProgramCache]: Analyzing trace with hash -399088529, now seen corresponding path program 222 times [2021-04-15 02:20:46,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:46,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45585353] [2021-04-15 02:20:46,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:46,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:46,248 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:46,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45585353] [2021-04-15 02:20:46,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397181853] [2021-04-15 02:20:46,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:46,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:20:46,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:46,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:46,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:46,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:46,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:20:46,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100443687] [2021-04-15 02:20:46,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:46,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:46,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:46,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:46,326 INFO L87 Difference]: Start difference. First operand 5368 states and 15769 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:46,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:46,421 INFO L93 Difference]: Finished difference Result 5731 states and 16223 transitions. [2021-04-15 02:20:46,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:20:46,421 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:46,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:46,430 INFO L225 Difference]: With dead ends: 5731 [2021-04-15 02:20:46,430 INFO L226 Difference]: Without dead ends: 5731 [2021-04-15 02:20:46,430 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 71.3ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:20:46,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5731 states. [2021-04-15 02:20:46,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5731 to 5320. [2021-04-15 02:20:46,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5320 states, 5319 states have (on average 2.9332581312276744) internal successors, (15602), 5319 states have internal predecessors, (15602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:46,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5320 states to 5320 states and 15602 transitions. [2021-04-15 02:20:46,519 INFO L78 Accepts]: Start accepts. Automaton has 5320 states and 15602 transitions. Word has length 22 [2021-04-15 02:20:46,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:46,519 INFO L480 AbstractCegarLoop]: Abstraction has 5320 states and 15602 transitions. [2021-04-15 02:20:46,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:46,519 INFO L276 IsEmpty]: Start isEmpty. Operand 5320 states and 15602 transitions. [2021-04-15 02:20:46,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:46,526 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:46,526 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:46,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3231 [2021-04-15 02:20:46,727 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:46,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:46,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1835018965, now seen corresponding path program 223 times [2021-04-15 02:20:46,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:46,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785103987] [2021-04-15 02:20:46,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:46,795 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:46,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785103987] [2021-04-15 02:20:46,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961437490] [2021-04-15 02:20:46,795 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:46,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:46,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:46,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:46,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:46,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:20:46,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903473630] [2021-04-15 02:20:46,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:20:46,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:46,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:20:46,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:46,871 INFO L87 Difference]: Start difference. First operand 5320 states and 15602 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:47,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:47,006 INFO L93 Difference]: Finished difference Result 6238 states and 17516 transitions. [2021-04-15 02:20:47,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:20:47,007 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:47,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:47,017 INFO L225 Difference]: With dead ends: 6238 [2021-04-15 02:20:47,017 INFO L226 Difference]: Without dead ends: 6238 [2021-04-15 02:20:47,017 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:20:47,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6238 states. [2021-04-15 02:20:47,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6238 to 5233. [2021-04-15 02:20:47,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5233 states, 5232 states have (on average 2.922400611620795) internal successors, (15290), 5232 states have internal predecessors, (15290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:47,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5233 states to 5233 states and 15290 transitions. [2021-04-15 02:20:47,111 INFO L78 Accepts]: Start accepts. Automaton has 5233 states and 15290 transitions. Word has length 22 [2021-04-15 02:20:47,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:47,111 INFO L480 AbstractCegarLoop]: Abstraction has 5233 states and 15290 transitions. [2021-04-15 02:20:47,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:47,111 INFO L276 IsEmpty]: Start isEmpty. Operand 5233 states and 15290 transitions. [2021-04-15 02:20:47,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:47,120 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:47,120 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:47,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3232 [2021-04-15 02:20:47,333 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:47,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:47,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1922092753, now seen corresponding path program 224 times [2021-04-15 02:20:47,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:47,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258827473] [2021-04-15 02:20:47,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:47,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:47,402 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:47,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258827473] [2021-04-15 02:20:47,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865681913] [2021-04-15 02:20:47,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:47,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:47,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:47,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:47,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:47,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:47,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:20:47,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358921176] [2021-04-15 02:20:47,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:20:47,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:47,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:20:47,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:47,481 INFO L87 Difference]: Start difference. First operand 5233 states and 15290 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:47,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:47,665 INFO L93 Difference]: Finished difference Result 8227 states and 23267 transitions. [2021-04-15 02:20:47,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:20:47,666 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:47,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:47,679 INFO L225 Difference]: With dead ends: 8227 [2021-04-15 02:20:47,679 INFO L226 Difference]: Without dead ends: 8227 [2021-04-15 02:20:47,679 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 133.7ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:20:47,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8227 states. [2021-04-15 02:20:47,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8227 to 6539. [2021-04-15 02:20:47,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6539 states, 6538 states have (on average 2.962220862649128) internal successors, (19367), 6538 states have internal predecessors, (19367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:47,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6539 states to 6539 states and 19367 transitions. [2021-04-15 02:20:47,796 INFO L78 Accepts]: Start accepts. Automaton has 6539 states and 19367 transitions. Word has length 22 [2021-04-15 02:20:47,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:47,796 INFO L480 AbstractCegarLoop]: Abstraction has 6539 states and 19367 transitions. [2021-04-15 02:20:47,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:47,796 INFO L276 IsEmpty]: Start isEmpty. Operand 6539 states and 19367 transitions. [2021-04-15 02:20:47,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:47,804 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:47,804 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:48,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3233,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:48,005 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:48,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:48,005 INFO L82 PathProgramCache]: Analyzing trace with hash 971614503, now seen corresponding path program 225 times [2021-04-15 02:20:48,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:48,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761641860] [2021-04-15 02:20:48,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:48,077 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:48,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761641860] [2021-04-15 02:20:48,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293626148] [2021-04-15 02:20:48,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:48,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:20:48,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:48,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:48,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:48,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:48,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:20:48,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614212630] [2021-04-15 02:20:48,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:20:48,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:48,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:20:48,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:48,149 INFO L87 Difference]: Start difference. First operand 6539 states and 19367 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:48,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:48,323 INFO L93 Difference]: Finished difference Result 8105 states and 23072 transitions. [2021-04-15 02:20:48,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:20:48,324 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:48,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:48,337 INFO L225 Difference]: With dead ends: 8105 [2021-04-15 02:20:48,337 INFO L226 Difference]: Without dead ends: 8105 [2021-04-15 02:20:48,338 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:20:48,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8105 states. [2021-04-15 02:20:48,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8105 to 5159. [2021-04-15 02:20:48,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5159 states, 5158 states have (on average 2.929042264443583) internal successors, (15108), 5158 states have internal predecessors, (15108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:48,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5159 states to 5159 states and 15108 transitions. [2021-04-15 02:20:48,446 INFO L78 Accepts]: Start accepts. Automaton has 5159 states and 15108 transitions. Word has length 22 [2021-04-15 02:20:48,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:48,446 INFO L480 AbstractCegarLoop]: Abstraction has 5159 states and 15108 transitions. [2021-04-15 02:20:48,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:48,447 INFO L276 IsEmpty]: Start isEmpty. Operand 5159 states and 15108 transitions. [2021-04-15 02:20:48,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:48,452 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:48,452 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:48,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3234,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:48,652 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:48,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:48,653 INFO L82 PathProgramCache]: Analyzing trace with hash -305915357, now seen corresponding path program 226 times [2021-04-15 02:20:48,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:48,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676969601] [2021-04-15 02:20:48,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:48,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676969601] [2021-04-15 02:20:48,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139583903] [2021-04-15 02:20:48,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:48,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:48,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:48,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:48,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:48,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:48,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:20:48,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570322504] [2021-04-15 02:20:48,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:48,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:48,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:48,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:48,760 INFO L87 Difference]: Start difference. First operand 5159 states and 15108 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:48,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:48,916 INFO L93 Difference]: Finished difference Result 5517 states and 15611 transitions. [2021-04-15 02:20:48,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:20:48,916 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:48,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:48,921 INFO L225 Difference]: With dead ends: 5517 [2021-04-15 02:20:48,921 INFO L226 Difference]: Without dead ends: 5513 [2021-04-15 02:20:48,921 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:20:48,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5513 states. [2021-04-15 02:20:48,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5513 to 5171. [2021-04-15 02:20:48,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5171 states, 5170 states have (on average 2.927852998065764) internal successors, (15137), 5170 states have internal predecessors, (15137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:48,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5171 states to 5171 states and 15137 transitions. [2021-04-15 02:20:48,978 INFO L78 Accepts]: Start accepts. Automaton has 5171 states and 15137 transitions. Word has length 22 [2021-04-15 02:20:48,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:48,978 INFO L480 AbstractCegarLoop]: Abstraction has 5171 states and 15137 transitions. [2021-04-15 02:20:48,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:48,978 INFO L276 IsEmpty]: Start isEmpty. Operand 5171 states and 15137 transitions. [2021-04-15 02:20:48,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:48,982 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:48,982 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:49,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3235,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:49,183 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:49,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:49,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1411833703, now seen corresponding path program 227 times [2021-04-15 02:20:49,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:49,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550349977] [2021-04-15 02:20:49,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:49,238 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:49,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550349977] [2021-04-15 02:20:49,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050809820] [2021-04-15 02:20:49,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:49,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:20:49,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:49,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:49,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:49,308 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:49,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:49,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:20:49,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953160521] [2021-04-15 02:20:49,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:49,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:49,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:49,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:49,308 INFO L87 Difference]: Start difference. First operand 5171 states and 15137 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:49,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:49,400 INFO L93 Difference]: Finished difference Result 5892 states and 16526 transitions. [2021-04-15 02:20:49,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:20:49,401 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:49,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:49,410 INFO L225 Difference]: With dead ends: 5892 [2021-04-15 02:20:49,410 INFO L226 Difference]: Without dead ends: 5892 [2021-04-15 02:20:49,410 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:20:49,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5892 states. [2021-04-15 02:20:49,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5892 to 5183. [2021-04-15 02:20:49,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5183 states, 5182 states have (on average 2.9260903126206097) internal successors, (15163), 5182 states have internal predecessors, (15163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:49,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5183 states to 5183 states and 15163 transitions. [2021-04-15 02:20:49,490 INFO L78 Accepts]: Start accepts. Automaton has 5183 states and 15163 transitions. Word has length 22 [2021-04-15 02:20:49,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:49,490 INFO L480 AbstractCegarLoop]: Abstraction has 5183 states and 15163 transitions. [2021-04-15 02:20:49,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:49,491 INFO L276 IsEmpty]: Start isEmpty. Operand 5183 states and 15163 transitions. [2021-04-15 02:20:49,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:49,497 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:49,497 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:49,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3236,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:49,697 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:49,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:49,697 INFO L82 PathProgramCache]: Analyzing trace with hash -317213631, now seen corresponding path program 228 times [2021-04-15 02:20:49,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:49,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227746186] [2021-04-15 02:20:49,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:49,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:49,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227746186] [2021-04-15 02:20:49,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956529651] [2021-04-15 02:20:49,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:49,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:20:49,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:49,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:49,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:49,828 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:49,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:49,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:20:49,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510179827] [2021-04-15 02:20:49,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:49,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:49,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:49,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:49,829 INFO L87 Difference]: Start difference. First operand 5183 states and 15163 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:49,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:49,930 INFO L93 Difference]: Finished difference Result 5922 states and 16620 transitions. [2021-04-15 02:20:49,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:20:49,931 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:49,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:49,939 INFO L225 Difference]: With dead ends: 5922 [2021-04-15 02:20:49,939 INFO L226 Difference]: Without dead ends: 5922 [2021-04-15 02:20:49,939 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:20:49,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5922 states. [2021-04-15 02:20:50,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5922 to 5178. [2021-04-15 02:20:50,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5178 states, 5177 states have (on average 2.924666795441375) internal successors, (15141), 5177 states have internal predecessors, (15141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:50,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5178 states to 5178 states and 15141 transitions. [2021-04-15 02:20:50,022 INFO L78 Accepts]: Start accepts. Automaton has 5178 states and 15141 transitions. Word has length 22 [2021-04-15 02:20:50,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:50,022 INFO L480 AbstractCegarLoop]: Abstraction has 5178 states and 15141 transitions. [2021-04-15 02:20:50,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:50,022 INFO L276 IsEmpty]: Start isEmpty. Operand 5178 states and 15141 transitions. [2021-04-15 02:20:50,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:50,028 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:50,028 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:50,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3237,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:50,229 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:50,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:50,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1916893863, now seen corresponding path program 229 times [2021-04-15 02:20:50,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:50,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649127243] [2021-04-15 02:20:50,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:50,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:50,293 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:50,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649127243] [2021-04-15 02:20:50,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253641725] [2021-04-15 02:20:50,293 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:50,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:50,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:50,364 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:50,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:50,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:20:50,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433606570] [2021-04-15 02:20:50,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:50,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:50,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:50,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:50,365 INFO L87 Difference]: Start difference. First operand 5178 states and 15141 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:50,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:50,467 INFO L93 Difference]: Finished difference Result 8667 states and 25108 transitions. [2021-04-15 02:20:50,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:20:50,468 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:50,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:50,483 INFO L225 Difference]: With dead ends: 8667 [2021-04-15 02:20:50,484 INFO L226 Difference]: Without dead ends: 8667 [2021-04-15 02:20:50,484 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:20:50,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8667 states. [2021-04-15 02:20:50,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8667 to 8167. [2021-04-15 02:20:50,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8167 states, 8166 states have (on average 2.984570168993387) internal successors, (24372), 8166 states have internal predecessors, (24372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:50,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8167 states to 8167 states and 24372 transitions. [2021-04-15 02:20:50,630 INFO L78 Accepts]: Start accepts. Automaton has 8167 states and 24372 transitions. Word has length 22 [2021-04-15 02:20:50,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:50,630 INFO L480 AbstractCegarLoop]: Abstraction has 8167 states and 24372 transitions. [2021-04-15 02:20:50,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:50,630 INFO L276 IsEmpty]: Start isEmpty. Operand 8167 states and 24372 transitions. [2021-04-15 02:20:50,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:50,640 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:50,640 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:50,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3238 [2021-04-15 02:20:50,840 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:50,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:50,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1840217855, now seen corresponding path program 230 times [2021-04-15 02:20:50,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:50,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574608530] [2021-04-15 02:20:50,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:50,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:50,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574608530] [2021-04-15 02:20:50,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254019549] [2021-04-15 02:20:50,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:50,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:50,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:50,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:50,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:50,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:50,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:20:50,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405661707] [2021-04-15 02:20:50,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:20:50,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:50,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:20:50,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:50,983 INFO L87 Difference]: Start difference. First operand 8167 states and 24372 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:51,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:51,140 INFO L93 Difference]: Finished difference Result 9066 states and 26143 transitions. [2021-04-15 02:20:51,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:20:51,141 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:51,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:51,156 INFO L225 Difference]: With dead ends: 9066 [2021-04-15 02:20:51,156 INFO L226 Difference]: Without dead ends: 9066 [2021-04-15 02:20:51,156 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:20:51,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9066 states. [2021-04-15 02:20:51,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9066 to 8041. [2021-04-15 02:20:51,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8041 states, 8040 states have (on average 2.981218905472637) internal successors, (23969), 8040 states have internal predecessors, (23969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:51,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8041 states to 8041 states and 23969 transitions. [2021-04-15 02:20:51,299 INFO L78 Accepts]: Start accepts. Automaton has 8041 states and 23969 transitions. Word has length 22 [2021-04-15 02:20:51,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:51,299 INFO L480 AbstractCegarLoop]: Abstraction has 8041 states and 23969 transitions. [2021-04-15 02:20:51,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:51,299 INFO L276 IsEmpty]: Start isEmpty. Operand 8041 states and 23969 transitions. [2021-04-15 02:20:51,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:51,309 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:51,309 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:51,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3239,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:51,510 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:51,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:51,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1948403175, now seen corresponding path program 231 times [2021-04-15 02:20:51,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:51,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172044223] [2021-04-15 02:20:51,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:51,584 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:51,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172044223] [2021-04-15 02:20:51,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609170683] [2021-04-15 02:20:51,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:51,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:20:51,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:51,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:51,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:51,650 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:51,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:51,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:20:51,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159143097] [2021-04-15 02:20:51,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:20:51,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:51,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:20:51,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:51,651 INFO L87 Difference]: Start difference. First operand 8041 states and 23969 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:51,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:51,848 INFO L93 Difference]: Finished difference Result 12727 states and 37454 transitions. [2021-04-15 02:20:51,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:20:51,849 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:51,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:51,866 INFO L225 Difference]: With dead ends: 12727 [2021-04-15 02:20:51,866 INFO L226 Difference]: Without dead ends: 12727 [2021-04-15 02:20:51,866 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 158.8ms TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:20:51,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12727 states. [2021-04-15 02:20:52,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12727 to 11269. [2021-04-15 02:20:52,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11269 states, 11268 states have (on average 3.0277777777777777) internal successors, (34117), 11268 states have internal predecessors, (34117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:52,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11269 states to 11269 states and 34117 transitions. [2021-04-15 02:20:52,059 INFO L78 Accepts]: Start accepts. Automaton has 11269 states and 34117 transitions. Word has length 22 [2021-04-15 02:20:52,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:52,060 INFO L480 AbstractCegarLoop]: Abstraction has 11269 states and 34117 transitions. [2021-04-15 02:20:52,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:52,060 INFO L276 IsEmpty]: Start isEmpty. Operand 11269 states and 34117 transitions. [2021-04-15 02:20:52,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:52,069 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:52,069 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:52,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3240 [2021-04-15 02:20:52,270 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:52,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:52,270 INFO L82 PathProgramCache]: Analyzing trace with hash 2063972437, now seen corresponding path program 232 times [2021-04-15 02:20:52,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:52,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202047526] [2021-04-15 02:20:52,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:52,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:52,332 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:52,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202047526] [2021-04-15 02:20:52,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286084948] [2021-04-15 02:20:52,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:52,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:52,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:52,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:52,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:52,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:52,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:20:52,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581499245] [2021-04-15 02:20:52,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:52,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:52,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:52,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:52,419 INFO L87 Difference]: Start difference. First operand 11269 states and 34117 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:52,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:52,537 INFO L93 Difference]: Finished difference Result 11783 states and 35094 transitions. [2021-04-15 02:20:52,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:20:52,538 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:52,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:52,559 INFO L225 Difference]: With dead ends: 11783 [2021-04-15 02:20:52,560 INFO L226 Difference]: Without dead ends: 11783 [2021-04-15 02:20:52,560 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:20:52,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11783 states. [2021-04-15 02:20:52,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11783 to 11255. [2021-04-15 02:20:52,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11255 states, 11254 states have (on average 3.027368046916652) internal successors, (34070), 11254 states have internal predecessors, (34070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:52,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11255 states to 11255 states and 34070 transitions. [2021-04-15 02:20:52,745 INFO L78 Accepts]: Start accepts. Automaton has 11255 states and 34070 transitions. Word has length 22 [2021-04-15 02:20:52,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:52,746 INFO L480 AbstractCegarLoop]: Abstraction has 11255 states and 34070 transitions. [2021-04-15 02:20:52,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:52,746 INFO L276 IsEmpty]: Start isEmpty. Operand 11255 states and 34070 transitions. [2021-04-15 02:20:52,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:52,757 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:52,757 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:52,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3241 [2021-04-15 02:20:52,958 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:52,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:52,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1693139281, now seen corresponding path program 233 times [2021-04-15 02:20:52,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:52,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922637815] [2021-04-15 02:20:52,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:53,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922637815] [2021-04-15 02:20:53,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362303111] [2021-04-15 02:20:53,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:53,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:20:53,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:53,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:53,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:53,100 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:53,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:53,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:20:53,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120312925] [2021-04-15 02:20:53,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:20:53,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:53,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:20:53,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:53,101 INFO L87 Difference]: Start difference. First operand 11255 states and 34070 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:53,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:53,278 INFO L93 Difference]: Finished difference Result 12824 states and 38032 transitions. [2021-04-15 02:20:53,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:20:53,279 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:53,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:53,303 INFO L225 Difference]: With dead ends: 12824 [2021-04-15 02:20:53,303 INFO L226 Difference]: Without dead ends: 12824 [2021-04-15 02:20:53,304 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 114.3ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:20:53,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12824 states. [2021-04-15 02:20:53,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12824 to 7201. [2021-04-15 02:20:53,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7201 states, 7200 states have (on average 2.9608333333333334) internal successors, (21318), 7200 states have internal predecessors, (21318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:53,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7201 states to 7201 states and 21318 transitions. [2021-04-15 02:20:53,474 INFO L78 Accepts]: Start accepts. Automaton has 7201 states and 21318 transitions. Word has length 22 [2021-04-15 02:20:53,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:53,474 INFO L480 AbstractCegarLoop]: Abstraction has 7201 states and 21318 transitions. [2021-04-15 02:20:53,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:53,474 INFO L276 IsEmpty]: Start isEmpty. Operand 7201 states and 21318 transitions. [2021-04-15 02:20:53,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:53,483 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:53,483 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:53,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3242 [2021-04-15 02:20:53,685 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:53,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:53,685 INFO L82 PathProgramCache]: Analyzing trace with hash 2095481749, now seen corresponding path program 234 times [2021-04-15 02:20:53,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:53,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57306797] [2021-04-15 02:20:53,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:53,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:53,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57306797] [2021-04-15 02:20:53,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829832819] [2021-04-15 02:20:53,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:53,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:20:53,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:53,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:53,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:53,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:53,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:20:53,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797435286] [2021-04-15 02:20:53,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:20:53,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:53,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:20:53,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:53,835 INFO L87 Difference]: Start difference. First operand 7201 states and 21318 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:54,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:54,071 INFO L93 Difference]: Finished difference Result 10561 states and 30382 transitions. [2021-04-15 02:20:54,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:20:54,071 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:54,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:54,090 INFO L225 Difference]: With dead ends: 10561 [2021-04-15 02:20:54,090 INFO L226 Difference]: Without dead ends: 10561 [2021-04-15 02:20:54,090 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:20:54,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10561 states. [2021-04-15 02:20:54,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10561 to 6109. [2021-04-15 02:20:54,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6109 states, 6108 states have (on average 2.947282252783235) internal successors, (18002), 6108 states have internal predecessors, (18002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:54,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6109 states to 6109 states and 18002 transitions. [2021-04-15 02:20:54,226 INFO L78 Accepts]: Start accepts. Automaton has 6109 states and 18002 transitions. Word has length 22 [2021-04-15 02:20:54,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:54,226 INFO L480 AbstractCegarLoop]: Abstraction has 6109 states and 18002 transitions. [2021-04-15 02:20:54,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:54,226 INFO L276 IsEmpty]: Start isEmpty. Operand 6109 states and 18002 transitions. [2021-04-15 02:20:54,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:54,234 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:54,234 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:54,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3243 [2021-04-15 02:20:54,434 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:54,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:54,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1959701393, now seen corresponding path program 235 times [2021-04-15 02:20:54,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:54,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928760833] [2021-04-15 02:20:54,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:54,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:20:54,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928760833] [2021-04-15 02:20:54,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968412772] [2021-04-15 02:20:54,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:54,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:54,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:54,563 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:20:54,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:54,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:20:54,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578559339] [2021-04-15 02:20:54,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:20:54,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:54,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:20:54,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:54,564 INFO L87 Difference]: Start difference. First operand 6109 states and 18002 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:54,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:54,740 INFO L93 Difference]: Finished difference Result 6375 states and 18328 transitions. [2021-04-15 02:20:54,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:20:54,741 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:54,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:54,752 INFO L225 Difference]: With dead ends: 6375 [2021-04-15 02:20:54,752 INFO L226 Difference]: Without dead ends: 6371 [2021-04-15 02:20:54,752 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:20:54,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6371 states. [2021-04-15 02:20:54,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6371 to 6109. [2021-04-15 02:20:54,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6109 states, 6108 states have (on average 2.9466273739358217) internal successors, (17998), 6108 states have internal predecessors, (17998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:54,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6109 states to 6109 states and 17998 transitions. [2021-04-15 02:20:54,848 INFO L78 Accepts]: Start accepts. Automaton has 6109 states and 17998 transitions. Word has length 22 [2021-04-15 02:20:54,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:54,849 INFO L480 AbstractCegarLoop]: Abstraction has 6109 states and 17998 transitions. [2021-04-15 02:20:54,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:54,849 INFO L276 IsEmpty]: Start isEmpty. Operand 6109 states and 17998 transitions. [2021-04-15 02:20:54,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:54,856 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:54,856 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:55,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3244,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:55,056 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:55,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:55,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1459014895, now seen corresponding path program 236 times [2021-04-15 02:20:55,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:55,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371886144] [2021-04-15 02:20:55,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:55,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:55,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371886144] [2021-04-15 02:20:55,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376316051] [2021-04-15 02:20:55,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:55,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:55,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:55,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:55,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:55,216 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:55,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:55,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:20:55,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437393853] [2021-04-15 02:20:55,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:20:55,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:55,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:20:55,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:20:55,217 INFO L87 Difference]: Start difference. First operand 6109 states and 17998 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:55,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:55,441 INFO L93 Difference]: Finished difference Result 7567 states and 21448 transitions. [2021-04-15 02:20:55,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:20:55,441 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:55,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:55,450 INFO L225 Difference]: With dead ends: 7567 [2021-04-15 02:20:55,450 INFO L226 Difference]: Without dead ends: 7567 [2021-04-15 02:20:55,450 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 191.2ms TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:20:55,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7567 states. [2021-04-15 02:20:55,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7567 to 4949. [2021-04-15 02:20:55,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4949 states, 4948 states have (on average 2.927445432497979) internal successors, (14485), 4948 states have internal predecessors, (14485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:55,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4949 states to 4949 states and 14485 transitions. [2021-04-15 02:20:55,527 INFO L78 Accepts]: Start accepts. Automaton has 4949 states and 14485 transitions. Word has length 22 [2021-04-15 02:20:55,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:55,527 INFO L480 AbstractCegarLoop]: Abstraction has 4949 states and 14485 transitions. [2021-04-15 02:20:55,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:55,528 INFO L276 IsEmpty]: Start isEmpty. Operand 4949 states and 14485 transitions. [2021-04-15 02:20:55,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:55,532 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:55,532 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:55,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3245,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:55,732 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:55,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:55,732 INFO L82 PathProgramCache]: Analyzing trace with hash -2062760815, now seen corresponding path program 237 times [2021-04-15 02:20:55,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:55,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077772755] [2021-04-15 02:20:55,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:55,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:55,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077772755] [2021-04-15 02:20:55,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985513026] [2021-04-15 02:20:55,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:55,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:20:55,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:55,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:55,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:55,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:55,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:20:55,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809758907] [2021-04-15 02:20:55,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:55,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:55,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:55,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:55,842 INFO L87 Difference]: Start difference. First operand 4949 states and 14485 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:55,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:55,982 INFO L93 Difference]: Finished difference Result 5274 states and 14931 transitions. [2021-04-15 02:20:55,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:20:55,982 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:55,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:55,990 INFO L225 Difference]: With dead ends: 5274 [2021-04-15 02:20:55,990 INFO L226 Difference]: Without dead ends: 5270 [2021-04-15 02:20:55,990 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:20:55,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5270 states. [2021-04-15 02:20:56,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5270 to 4961. [2021-04-15 02:20:56,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4961 states, 4960 states have (on average 2.926209677419355) internal successors, (14514), 4960 states have internal predecessors, (14514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:56,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4961 states to 4961 states and 14514 transitions. [2021-04-15 02:20:56,071 INFO L78 Accepts]: Start accepts. Automaton has 4961 states and 14514 transitions. Word has length 22 [2021-04-15 02:20:56,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:56,071 INFO L480 AbstractCegarLoop]: Abstraction has 4961 states and 14514 transitions. [2021-04-15 02:20:56,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:56,071 INFO L276 IsEmpty]: Start isEmpty. Operand 4961 states and 14514 transitions. [2021-04-15 02:20:56,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:56,077 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:56,077 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:56,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3246,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:56,277 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:56,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:56,277 INFO L82 PathProgramCache]: Analyzing trace with hash -345011755, now seen corresponding path program 238 times [2021-04-15 02:20:56,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:56,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977467174] [2021-04-15 02:20:56,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:56,333 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:56,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977467174] [2021-04-15 02:20:56,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848810847] [2021-04-15 02:20:56,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:56,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:56,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:56,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:56,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:56,419 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:56,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:56,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:20:56,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615172541] [2021-04-15 02:20:56,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:56,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:56,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:56,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:56,420 INFO L87 Difference]: Start difference. First operand 4961 states and 14514 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:56,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:56,536 INFO L93 Difference]: Finished difference Result 5690 states and 15948 transitions. [2021-04-15 02:20:56,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:20:56,537 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:56,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:56,545 INFO L225 Difference]: With dead ends: 5690 [2021-04-15 02:20:56,545 INFO L226 Difference]: Without dead ends: 5690 [2021-04-15 02:20:56,545 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=111, Invalid=161, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:20:56,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5690 states. [2021-04-15 02:20:56,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5690 to 4969. [2021-04-15 02:20:56,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4969 states, 4968 states have (on average 2.9253220611916264) internal successors, (14533), 4968 states have internal predecessors, (14533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:56,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4969 states to 4969 states and 14533 transitions. [2021-04-15 02:20:56,624 INFO L78 Accepts]: Start accepts. Automaton has 4969 states and 14533 transitions. Word has length 22 [2021-04-15 02:20:56,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:56,625 INFO L480 AbstractCegarLoop]: Abstraction has 4969 states and 14533 transitions. [2021-04-15 02:20:56,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:56,625 INFO L276 IsEmpty]: Start isEmpty. Operand 4969 states and 14533 transitions. [2021-04-15 02:20:56,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:56,630 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:56,630 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:56,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3247 [2021-04-15 02:20:56,831 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:56,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:56,831 INFO L82 PathProgramCache]: Analyzing trace with hash -2074059089, now seen corresponding path program 239 times [2021-04-15 02:20:56,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:56,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965816043] [2021-04-15 02:20:56,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:56,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:56,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965816043] [2021-04-15 02:20:56,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145587662] [2021-04-15 02:20:56,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:56,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:20:56,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:56,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:56,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:56,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:56,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:20:56,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207062174] [2021-04-15 02:20:56,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:56,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:56,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:56,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:56,964 INFO L87 Difference]: Start difference. First operand 4969 states and 14533 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:57,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:57,100 INFO L93 Difference]: Finished difference Result 5878 states and 16463 transitions. [2021-04-15 02:20:57,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:20:57,101 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:57,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:57,109 INFO L225 Difference]: With dead ends: 5878 [2021-04-15 02:20:57,110 INFO L226 Difference]: Without dead ends: 5878 [2021-04-15 02:20:57,110 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:20:57,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5878 states. [2021-04-15 02:20:57,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5878 to 4973. [2021-04-15 02:20:57,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4973 states, 4972 states have (on average 2.924979887369268) internal successors, (14543), 4972 states have internal predecessors, (14543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:57,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4973 states to 4973 states and 14543 transitions. [2021-04-15 02:20:57,194 INFO L78 Accepts]: Start accepts. Automaton has 4973 states and 14543 transitions. Word has length 22 [2021-04-15 02:20:57,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:57,194 INFO L480 AbstractCegarLoop]: Abstraction has 4973 states and 14543 transitions. [2021-04-15 02:20:57,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:57,195 INFO L276 IsEmpty]: Start isEmpty. Operand 4973 states and 14543 transitions. [2021-04-15 02:20:57,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:57,201 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:57,201 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:57,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3248,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:57,401 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:57,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:57,401 INFO L82 PathProgramCache]: Analyzing trace with hash 160048405, now seen corresponding path program 240 times [2021-04-15 02:20:57,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:57,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862939624] [2021-04-15 02:20:57,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:57,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862939624] [2021-04-15 02:20:57,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005149615] [2021-04-15 02:20:57,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:57,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:20:57,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:57,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:57,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:57,542 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:57,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:57,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:20:57,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465501116] [2021-04-15 02:20:57,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:20:57,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:57,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:20:57,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:57,543 INFO L87 Difference]: Start difference. First operand 4973 states and 14543 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:57,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:57,672 INFO L93 Difference]: Finished difference Result 5765 states and 16200 transitions. [2021-04-15 02:20:57,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:20:57,672 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:57,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:57,680 INFO L225 Difference]: With dead ends: 5765 [2021-04-15 02:20:57,680 INFO L226 Difference]: Without dead ends: 5765 [2021-04-15 02:20:57,681 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:20:57,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5765 states. [2021-04-15 02:20:57,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5765 to 4919. [2021-04-15 02:20:57,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4919 states, 4918 states have (on average 2.9217161447742983) internal successors, (14369), 4918 states have internal predecessors, (14369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:57,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4919 states to 4919 states and 14369 transitions. [2021-04-15 02:20:57,759 INFO L78 Accepts]: Start accepts. Automaton has 4919 states and 14369 transitions. Word has length 22 [2021-04-15 02:20:57,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:57,759 INFO L480 AbstractCegarLoop]: Abstraction has 4919 states and 14369 transitions. [2021-04-15 02:20:57,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:57,759 INFO L276 IsEmpty]: Start isEmpty. Operand 4919 states and 14369 transitions. [2021-04-15 02:20:57,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:57,765 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:57,765 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:57,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3249,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:57,966 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:57,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:57,966 INFO L82 PathProgramCache]: Analyzing trace with hash 697903983, now seen corresponding path program 241 times [2021-04-15 02:20:57,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:57,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338532427] [2021-04-15 02:20:57,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:57,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:58,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338532427] [2021-04-15 02:20:58,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231492747] [2021-04-15 02:20:58,033 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:58,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:58,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:58,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:58,126 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:58,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:58,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:20:58,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828285191] [2021-04-15 02:20:58,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:20:58,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:58,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:20:58,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:58,127 INFO L87 Difference]: Start difference. First operand 4919 states and 14369 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:58,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:58,257 INFO L93 Difference]: Finished difference Result 8014 states and 23033 transitions. [2021-04-15 02:20:58,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:20:58,257 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:58,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:58,270 INFO L225 Difference]: With dead ends: 8014 [2021-04-15 02:20:58,270 INFO L226 Difference]: Without dead ends: 8014 [2021-04-15 02:20:58,270 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:20:58,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8014 states. [2021-04-15 02:20:58,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8014 to 7160. [2021-04-15 02:20:58,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7160 states, 7159 states have (on average 2.966894817711971) internal successors, (21240), 7159 states have internal predecessors, (21240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:58,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7160 states to 7160 states and 21240 transitions. [2021-04-15 02:20:58,394 INFO L78 Accepts]: Start accepts. Automaton has 7160 states and 21240 transitions. Word has length 22 [2021-04-15 02:20:58,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:58,394 INFO L480 AbstractCegarLoop]: Abstraction has 7160 states and 21240 transitions. [2021-04-15 02:20:58,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:58,395 INFO L276 IsEmpty]: Start isEmpty. Operand 7160 states and 21240 transitions. [2021-04-15 02:20:58,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:58,403 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:58,403 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:58,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3250 [2021-04-15 02:20:58,604 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:58,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:58,604 INFO L82 PathProgramCache]: Analyzing trace with hash 191557717, now seen corresponding path program 242 times [2021-04-15 02:20:58,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:58,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871626199] [2021-04-15 02:20:58,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:58,683 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:58,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871626199] [2021-04-15 02:20:58,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131578498] [2021-04-15 02:20:58,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:58,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:58,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:58,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:58,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:58,759 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:58,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:58,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:20:58,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386456376] [2021-04-15 02:20:58,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:20:58,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:58,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:20:58,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:20:58,759 INFO L87 Difference]: Start difference. First operand 7160 states and 21240 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:58,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:58,962 INFO L93 Difference]: Finished difference Result 8322 states and 23810 transitions. [2021-04-15 02:20:58,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:20:58,962 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:58,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:58,975 INFO L225 Difference]: With dead ends: 8322 [2021-04-15 02:20:58,976 INFO L226 Difference]: Without dead ends: 8322 [2021-04-15 02:20:58,976 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 145.8ms TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:20:58,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8322 states. [2021-04-15 02:20:59,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8322 to 7016. [2021-04-15 02:20:59,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7016 states, 7015 states have (on average 2.9642195295794727) internal successors, (20794), 7015 states have internal predecessors, (20794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:59,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7016 states to 7016 states and 20794 transitions. [2021-04-15 02:20:59,095 INFO L78 Accepts]: Start accepts. Automaton has 7016 states and 20794 transitions. Word has length 22 [2021-04-15 02:20:59,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:59,095 INFO L480 AbstractCegarLoop]: Abstraction has 7016 states and 20794 transitions. [2021-04-15 02:20:59,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:59,095 INFO L276 IsEmpty]: Start isEmpty. Operand 7016 states and 20794 transitions. [2021-04-15 02:20:59,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:59,103 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:59,103 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:59,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3251 [2021-04-15 02:20:59,303 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:59,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:59,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1674692655, now seen corresponding path program 243 times [2021-04-15 02:20:59,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:59,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363575888] [2021-04-15 02:20:59,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:59,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363575888] [2021-04-15 02:20:59,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445768284] [2021-04-15 02:20:59,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:59,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:20:59,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:59,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:59,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:59,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:59,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:20:59,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151854173] [2021-04-15 02:20:59,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:20:59,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:59,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:20:59,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:20:59,452 INFO L87 Difference]: Start difference. First operand 7016 states and 20794 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:59,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:59,694 INFO L93 Difference]: Finished difference Result 10804 states and 31397 transitions. [2021-04-15 02:20:59,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:20:59,695 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:20:59,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:59,713 INFO L225 Difference]: With dead ends: 10804 [2021-04-15 02:20:59,713 INFO L226 Difference]: Without dead ends: 10804 [2021-04-15 02:20:59,714 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 203.5ms TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:20:59,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10804 states. [2021-04-15 02:20:59,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10804 to 8931. [2021-04-15 02:20:59,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8931 states, 8930 states have (on average 3.0094064949608064) internal successors, (26874), 8930 states have internal predecessors, (26874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:59,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8931 states to 8931 states and 26874 transitions. [2021-04-15 02:20:59,869 INFO L78 Accepts]: Start accepts. Automaton has 8931 states and 26874 transitions. Word has length 22 [2021-04-15 02:20:59,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:59,869 INFO L480 AbstractCegarLoop]: Abstraction has 8931 states and 26874 transitions. [2021-04-15 02:20:59,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:59,869 INFO L276 IsEmpty]: Start isEmpty. Operand 8931 states and 26874 transitions. [2021-04-15 02:20:59,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:20:59,879 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:59,879 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:00,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3252 [2021-04-15 02:21:00,080 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:00,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:00,080 INFO L82 PathProgramCache]: Analyzing trace with hash 962372481, now seen corresponding path program 244 times [2021-04-15 02:21:00,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:00,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937037179] [2021-04-15 02:21:00,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:00,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:00,152 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:00,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937037179] [2021-04-15 02:21:00,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952428220] [2021-04-15 02:21:00,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:00,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:21:00,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:00,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:00,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:00,221 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:00,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:00,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:21:00,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958706318] [2021-04-15 02:21:00,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:21:00,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:00,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:21:00,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:21:00,222 INFO L87 Difference]: Start difference. First operand 8931 states and 26874 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:00,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:00,346 INFO L93 Difference]: Finished difference Result 9250 states and 27288 transitions. [2021-04-15 02:21:00,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:21:00,347 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:00,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:00,363 INFO L225 Difference]: With dead ends: 9250 [2021-04-15 02:21:00,363 INFO L226 Difference]: Without dead ends: 9249 [2021-04-15 02:21:00,363 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:21:00,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9249 states. [2021-04-15 02:21:00,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9249 to 8667. [2021-04-15 02:21:00,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8667 states, 8666 states have (on average 3.0012693284098777) internal successors, (26009), 8666 states have internal predecessors, (26009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:00,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8667 states to 8667 states and 26009 transitions. [2021-04-15 02:21:00,514 INFO L78 Accepts]: Start accepts. Automaton has 8667 states and 26009 transitions. Word has length 22 [2021-04-15 02:21:00,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:00,515 INFO L480 AbstractCegarLoop]: Abstraction has 8667 states and 26009 transitions. [2021-04-15 02:21:00,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:00,515 INFO L276 IsEmpty]: Start isEmpty. Operand 8667 states and 26009 transitions. [2021-04-15 02:21:00,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:00,525 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:00,525 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:00,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3253,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:00,726 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:00,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:00,726 INFO L82 PathProgramCache]: Analyzing trace with hash 456026215, now seen corresponding path program 245 times [2021-04-15 02:21:00,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:00,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544245316] [2021-04-15 02:21:00,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:00,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:00,807 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:00,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544245316] [2021-04-15 02:21:00,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842891763] [2021-04-15 02:21:00,808 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:00,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:21:00,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:00,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:00,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:00,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:00,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:21:00,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933097677] [2021-04-15 02:21:00,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:21:00,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:00,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:21:00,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:21:00,879 INFO L87 Difference]: Start difference. First operand 8667 states and 26009 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:01,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:01,057 INFO L93 Difference]: Finished difference Result 9868 states and 29015 transitions. [2021-04-15 02:21:01,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:21:01,057 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:01,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:01,074 INFO L225 Difference]: With dead ends: 9868 [2021-04-15 02:21:01,074 INFO L226 Difference]: Without dead ends: 9868 [2021-04-15 02:21:01,074 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 140.2ms TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:21:01,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9868 states. [2021-04-15 02:21:01,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9868 to 6055. [2021-04-15 02:21:01,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6055 states, 6054 states have (on average 2.9398744631648497) internal successors, (17798), 6054 states have internal predecessors, (17798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:01,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6055 states to 6055 states and 17798 transitions. [2021-04-15 02:21:01,199 INFO L78 Accepts]: Start accepts. Automaton has 6055 states and 17798 transitions. Word has length 22 [2021-04-15 02:21:01,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:01,199 INFO L480 AbstractCegarLoop]: Abstraction has 6055 states and 17798 transitions. [2021-04-15 02:21:01,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:01,199 INFO L276 IsEmpty]: Start isEmpty. Operand 6055 states and 17798 transitions. [2021-04-15 02:21:01,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:01,206 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:01,206 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:01,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3254 [2021-04-15 02:21:01,406 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:01,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:01,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1939161153, now seen corresponding path program 246 times [2021-04-15 02:21:01,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:01,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848114297] [2021-04-15 02:21:01,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:01,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848114297] [2021-04-15 02:21:01,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655445452] [2021-04-15 02:21:01,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:01,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:21:01,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:01,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:01,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:01,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:01,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:21:01,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827237811] [2021-04-15 02:21:01,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:21:01,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:01,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:21:01,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:21:01,561 INFO L87 Difference]: Start difference. First operand 6055 states and 17798 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:01,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:01,846 INFO L93 Difference]: Finished difference Result 8378 states and 23833 transitions. [2021-04-15 02:21:01,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:21:01,847 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:01,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:01,860 INFO L225 Difference]: With dead ends: 8378 [2021-04-15 02:21:01,860 INFO L226 Difference]: Without dead ends: 8378 [2021-04-15 02:21:01,860 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 219.3ms TimeCoverageRelationStatistics Valid=362, Invalid=694, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:21:01,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8378 states. [2021-04-15 02:21:01,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8378 to 4616. [2021-04-15 02:21:01,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4616 states, 4615 states have (on average 2.9371614301191764) internal successors, (13555), 4615 states have internal predecessors, (13555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:01,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4616 states to 4616 states and 13555 transitions. [2021-04-15 02:21:01,955 INFO L78 Accepts]: Start accepts. Automaton has 4616 states and 13555 transitions. Word has length 22 [2021-04-15 02:21:01,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:01,955 INFO L480 AbstractCegarLoop]: Abstraction has 4616 states and 13555 transitions. [2021-04-15 02:21:01,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:01,955 INFO L276 IsEmpty]: Start isEmpty. Operand 4616 states and 13555 transitions. [2021-04-15 02:21:01,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:01,961 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:01,961 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:02,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3255,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:02,165 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:02,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:02,165 INFO L82 PathProgramCache]: Analyzing trace with hash -611442137, now seen corresponding path program 247 times [2021-04-15 02:21:02,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:02,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530763164] [2021-04-15 02:21:02,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:02,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:02,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530763164] [2021-04-15 02:21:02,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616599855] [2021-04-15 02:21:02,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:02,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:02,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:02,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:02,346 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:02,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:02,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:21:02,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853306066] [2021-04-15 02:21:02,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:21:02,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:02,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:21:02,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:21:02,347 INFO L87 Difference]: Start difference. First operand 4616 states and 13555 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:02,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:02,595 INFO L93 Difference]: Finished difference Result 7421 states and 21200 transitions. [2021-04-15 02:21:02,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:21:02,596 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:02,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:02,608 INFO L225 Difference]: With dead ends: 7421 [2021-04-15 02:21:02,608 INFO L226 Difference]: Without dead ends: 7421 [2021-04-15 02:21:02,608 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=319, Invalid=611, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:21:02,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7421 states. [2021-04-15 02:21:02,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7421 to 6529. [2021-04-15 02:21:02,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6529 states, 6528 states have (on average 2.9543504901960786) internal successors, (19286), 6528 states have internal predecessors, (19286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:02,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6529 states to 6529 states and 19286 transitions. [2021-04-15 02:21:02,723 INFO L78 Accepts]: Start accepts. Automaton has 6529 states and 19286 transitions. Word has length 22 [2021-04-15 02:21:02,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:02,724 INFO L480 AbstractCegarLoop]: Abstraction has 6529 states and 19286 transitions. [2021-04-15 02:21:02,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:02,724 INFO L276 IsEmpty]: Start isEmpty. Operand 6529 states and 19286 transitions. [2021-04-15 02:21:02,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:02,731 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:02,731 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:02,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3256,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:02,932 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:02,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:02,932 INFO L82 PathProgramCache]: Analyzing trace with hash -690395165, now seen corresponding path program 248 times [2021-04-15 02:21:02,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:02,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889295610] [2021-04-15 02:21:02,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:02,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:02,982 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:02,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889295610] [2021-04-15 02:21:02,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608618924] [2021-04-15 02:21:02,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:03,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:21:03,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:03,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:03,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:03,040 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:03,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:03,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:21:03,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71025309] [2021-04-15 02:21:03,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:21:03,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:03,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:21:03,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:21:03,041 INFO L87 Difference]: Start difference. First operand 6529 states and 19286 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:03,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:03,185 INFO L93 Difference]: Finished difference Result 6802 states and 19658 transitions. [2021-04-15 02:21:03,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:21:03,186 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:03,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:03,192 INFO L225 Difference]: With dead ends: 6802 [2021-04-15 02:21:03,192 INFO L226 Difference]: Without dead ends: 6798 [2021-04-15 02:21:03,192 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:21:03,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6798 states. [2021-04-15 02:21:03,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6798 to 6498. [2021-04-15 02:21:03,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6498 states, 6497 states have (on average 2.950592581191319) internal successors, (19170), 6497 states have internal predecessors, (19170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:03,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6498 states to 6498 states and 19170 transitions. [2021-04-15 02:21:03,271 INFO L78 Accepts]: Start accepts. Automaton has 6498 states and 19170 transitions. Word has length 22 [2021-04-15 02:21:03,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:03,271 INFO L480 AbstractCegarLoop]: Abstraction has 6498 states and 19170 transitions. [2021-04-15 02:21:03,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:03,271 INFO L276 IsEmpty]: Start isEmpty. Operand 6498 states and 19170 transitions. [2021-04-15 02:21:03,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:03,276 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:03,276 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:03,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3257,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:03,476 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:03,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:03,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1027353895, now seen corresponding path program 249 times [2021-04-15 02:21:03,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:03,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005561279] [2021-04-15 02:21:03,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:03,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:03,621 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:03,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005561279] [2021-04-15 02:21:03,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696197823] [2021-04-15 02:21:03,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:03,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:21:03,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:03,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:03,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:03,712 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:03,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:03,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:21:03,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492410056] [2021-04-15 02:21:03,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:21:03,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:03,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:21:03,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:21:03,713 INFO L87 Difference]: Start difference. First operand 6498 states and 19170 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:03,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:03,860 INFO L93 Difference]: Finished difference Result 7322 states and 20998 transitions. [2021-04-15 02:21:03,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:21:03,861 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:03,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:03,873 INFO L225 Difference]: With dead ends: 7322 [2021-04-15 02:21:03,873 INFO L226 Difference]: Without dead ends: 7322 [2021-04-15 02:21:03,873 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 118.6ms TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:21:03,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7322 states. [2021-04-15 02:21:03,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7322 to 6505. [2021-04-15 02:21:03,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6505 states, 6504 states have (on average 2.950030750307503) internal successors, (19187), 6504 states have internal predecessors, (19187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:04,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6505 states to 6505 states and 19187 transitions. [2021-04-15 02:21:04,001 INFO L78 Accepts]: Start accepts. Automaton has 6505 states and 19187 transitions. Word has length 22 [2021-04-15 02:21:04,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:04,001 INFO L480 AbstractCegarLoop]: Abstraction has 6505 states and 19187 transitions. [2021-04-15 02:21:04,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:04,001 INFO L276 IsEmpty]: Start isEmpty. Operand 6505 states and 19187 transitions. [2021-04-15 02:21:04,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:04,008 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:04,008 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:04,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3258,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:04,209 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:04,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:04,209 INFO L82 PathProgramCache]: Analyzing trace with hash -701693439, now seen corresponding path program 250 times [2021-04-15 02:21:04,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:04,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679672345] [2021-04-15 02:21:04,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:04,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:04,272 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:04,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679672345] [2021-04-15 02:21:04,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56393063] [2021-04-15 02:21:04,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:04,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:21:04,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:04,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:04,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:04,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:04,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:21:04,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322366590] [2021-04-15 02:21:04,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:21:04,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:04,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:21:04,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:21:04,341 INFO L87 Difference]: Start difference. First operand 6505 states and 19187 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:04,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:04,498 INFO L93 Difference]: Finished difference Result 7657 states and 21924 transitions. [2021-04-15 02:21:04,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:21:04,499 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:04,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:04,511 INFO L225 Difference]: With dead ends: 7657 [2021-04-15 02:21:04,512 INFO L226 Difference]: Without dead ends: 7657 [2021-04-15 02:21:04,512 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 112.6ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:21:04,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7657 states. [2021-04-15 02:21:04,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7657 to 6280. [2021-04-15 02:21:04,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6280 states, 6279 states have (on average 2.94186972447842) internal successors, (18472), 6279 states have internal predecessors, (18472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:04,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6280 states to 6280 states and 18472 transitions. [2021-04-15 02:21:04,633 INFO L78 Accepts]: Start accepts. Automaton has 6280 states and 18472 transitions. Word has length 22 [2021-04-15 02:21:04,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:04,633 INFO L480 AbstractCegarLoop]: Abstraction has 6280 states and 18472 transitions. [2021-04-15 02:21:04,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:04,633 INFO L276 IsEmpty]: Start isEmpty. Operand 6280 states and 18472 transitions. [2021-04-15 02:21:04,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:04,640 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:04,640 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:04,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3259 [2021-04-15 02:21:04,840 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:04,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:04,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1532414055, now seen corresponding path program 251 times [2021-04-15 02:21:04,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:04,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582214105] [2021-04-15 02:21:04,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:04,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:04,906 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:04,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582214105] [2021-04-15 02:21:04,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075829969] [2021-04-15 02:21:04,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:04,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:21:04,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:04,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:04,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:04,978 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:04,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:04,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:21:04,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108556553] [2021-04-15 02:21:04,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:21:04,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:04,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:21:04,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:21:04,979 INFO L87 Difference]: Start difference. First operand 6280 states and 18472 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:05,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:05,138 INFO L93 Difference]: Finished difference Result 8774 states and 25325 transitions. [2021-04-15 02:21:05,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:21:05,139 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:05,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:05,153 INFO L225 Difference]: With dead ends: 8774 [2021-04-15 02:21:05,153 INFO L226 Difference]: Without dead ends: 8774 [2021-04-15 02:21:05,153 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 125.6ms TimeCoverageRelationStatistics Valid=183, Invalid=323, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:21:05,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8774 states. [2021-04-15 02:21:05,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8774 to 7854. [2021-04-15 02:21:05,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7854 states, 7853 states have (on average 2.9848465554565133) internal successors, (23440), 7853 states have internal predecessors, (23440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:05,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7854 states to 7854 states and 23440 transitions. [2021-04-15 02:21:05,295 INFO L78 Accepts]: Start accepts. Automaton has 7854 states and 23440 transitions. Word has length 22 [2021-04-15 02:21:05,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:05,295 INFO L480 AbstractCegarLoop]: Abstraction has 7854 states and 23440 transitions. [2021-04-15 02:21:05,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:05,295 INFO L276 IsEmpty]: Start isEmpty. Operand 7854 states and 23440 transitions. [2021-04-15 02:21:05,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:05,306 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:05,306 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:05,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3260 [2021-04-15 02:21:05,507 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:05,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:05,508 INFO L82 PathProgramCache]: Analyzing trace with hash 2070269633, now seen corresponding path program 252 times [2021-04-15 02:21:05,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:05,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676560715] [2021-04-15 02:21:05,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:05,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:05,585 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:05,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676560715] [2021-04-15 02:21:05,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482087807] [2021-04-15 02:21:05,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:05,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:21:05,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:05,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:05,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:05,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:05,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:21:05,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466559791] [2021-04-15 02:21:05,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:21:05,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:05,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:21:05,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:21:05,700 INFO L87 Difference]: Start difference. First operand 7854 states and 23440 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:05,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:05,858 INFO L93 Difference]: Finished difference Result 8525 states and 24660 transitions. [2021-04-15 02:21:05,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:21:05,860 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:05,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:05,875 INFO L225 Difference]: With dead ends: 8525 [2021-04-15 02:21:05,875 INFO L226 Difference]: Without dead ends: 8525 [2021-04-15 02:21:05,876 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 127.7ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:21:05,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8525 states. [2021-04-15 02:21:05,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8525 to 7170. [2021-04-15 02:21:05,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7170 states, 7169 states have (on average 2.9768447482215095) internal successors, (21341), 7169 states have internal predecessors, (21341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:06,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7170 states to 7170 states and 21341 transitions. [2021-04-15 02:21:06,011 INFO L78 Accepts]: Start accepts. Automaton has 7170 states and 21341 transitions. Word has length 22 [2021-04-15 02:21:06,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:06,011 INFO L480 AbstractCegarLoop]: Abstraction has 7170 states and 21341 transitions. [2021-04-15 02:21:06,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:06,012 INFO L276 IsEmpty]: Start isEmpty. Operand 7170 states and 21341 transitions. [2021-04-15 02:21:06,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:06,020 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:06,020 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:06,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3261,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:06,222 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:06,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:06,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1563923367, now seen corresponding path program 253 times [2021-04-15 02:21:06,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:06,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857730750] [2021-04-15 02:21:06,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:06,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:06,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857730750] [2021-04-15 02:21:06,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144359961] [2021-04-15 02:21:06,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:06,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:06,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:06,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:06,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:21:06,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620543079] [2021-04-15 02:21:06,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:21:06,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:06,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:21:06,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:21:06,359 INFO L87 Difference]: Start difference. First operand 7170 states and 21341 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:06,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:06,476 INFO L93 Difference]: Finished difference Result 10318 states and 30338 transitions. [2021-04-15 02:21:06,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:21:06,477 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:06,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:06,488 INFO L225 Difference]: With dead ends: 10318 [2021-04-15 02:21:06,489 INFO L226 Difference]: Without dead ends: 10318 [2021-04-15 02:21:06,489 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 102.7ms TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:21:06,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10318 states. [2021-04-15 02:21:06,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10318 to 9947. [2021-04-15 02:21:06,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9947 states, 9946 states have (on average 2.995475568067565) internal successors, (29793), 9946 states have internal predecessors, (29793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:06,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9947 states to 9947 states and 29793 transitions. [2021-04-15 02:21:06,618 INFO L78 Accepts]: Start accepts. Automaton has 9947 states and 29793 transitions. Word has length 22 [2021-04-15 02:21:06,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:06,618 INFO L480 AbstractCegarLoop]: Abstraction has 9947 states and 29793 transitions. [2021-04-15 02:21:06,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:06,618 INFO L276 IsEmpty]: Start isEmpty. Operand 9947 states and 29793 transitions. [2021-04-15 02:21:06,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:06,625 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:06,625 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:06,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3262 [2021-04-15 02:21:06,826 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:06,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:06,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1247908991, now seen corresponding path program 254 times [2021-04-15 02:21:06,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:06,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640214187] [2021-04-15 02:21:06,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:06,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:06,919 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:06,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640214187] [2021-04-15 02:21:06,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182565881] [2021-04-15 02:21:06,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:06,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:21:06,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:06,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:06,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:06,994 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:06,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:06,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:21:06,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908270935] [2021-04-15 02:21:06,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:21:06,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:06,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:21:06,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:21:06,995 INFO L87 Difference]: Start difference. First operand 9947 states and 29793 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:07,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:07,217 INFO L93 Difference]: Finished difference Result 10463 states and 30703 transitions. [2021-04-15 02:21:07,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:21:07,217 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:07,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:07,236 INFO L225 Difference]: With dead ends: 10463 [2021-04-15 02:21:07,236 INFO L226 Difference]: Without dead ends: 10463 [2021-04-15 02:21:07,236 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 178.4ms TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:21:07,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10463 states. [2021-04-15 02:21:07,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10463 to 9768. [2021-04-15 02:21:07,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9768 states, 9767 states have (on average 2.995392648715061) internal successors, (29256), 9767 states have internal predecessors, (29256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:07,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9768 states to 9768 states and 29256 transitions. [2021-04-15 02:21:07,404 INFO L78 Accepts]: Start accepts. Automaton has 9768 states and 29256 transitions. Word has length 22 [2021-04-15 02:21:07,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:07,404 INFO L480 AbstractCegarLoop]: Abstraction has 9768 states and 29256 transitions. [2021-04-15 02:21:07,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:07,404 INFO L276 IsEmpty]: Start isEmpty. Operand 9768 states and 29256 transitions. [2021-04-15 02:21:07,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:07,415 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:07,415 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:07,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3263,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:07,616 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:07,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:07,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1779601127, now seen corresponding path program 255 times [2021-04-15 02:21:07,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:07,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967953873] [2021-04-15 02:21:07,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:07,707 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:07,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967953873] [2021-04-15 02:21:07,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42830822] [2021-04-15 02:21:07,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:07,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:21:07,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:07,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:07,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:07,789 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:07,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:07,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:21:07,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103434951] [2021-04-15 02:21:07,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:21:07,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:07,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:21:07,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:21:07,790 INFO L87 Difference]: Start difference. First operand 9768 states and 29256 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:08,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:08,128 INFO L93 Difference]: Finished difference Result 11837 states and 34803 transitions. [2021-04-15 02:21:08,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:21:08,129 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:08,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:08,149 INFO L225 Difference]: With dead ends: 11837 [2021-04-15 02:21:08,149 INFO L226 Difference]: Without dead ends: 11837 [2021-04-15 02:21:08,150 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 273.7ms TimeCoverageRelationStatistics Valid=448, Invalid=884, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 02:21:08,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11837 states. [2021-04-15 02:21:08,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11837 to 11079. [2021-04-15 02:21:08,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11079 states, 11078 states have (on average 2.998826502978877) internal successors, (33221), 11078 states have internal predecessors, (33221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:08,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11079 states to 11079 states and 33221 transitions. [2021-04-15 02:21:08,343 INFO L78 Accepts]: Start accepts. Automaton has 11079 states and 33221 transitions. Word has length 22 [2021-04-15 02:21:08,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:08,343 INFO L480 AbstractCegarLoop]: Abstraction has 11079 states and 33221 transitions. [2021-04-15 02:21:08,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:08,344 INFO L276 IsEmpty]: Start isEmpty. Operand 11079 states and 33221 transitions. [2021-04-15 02:21:08,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:08,355 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:08,355 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:08,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3264 [2021-04-15 02:21:08,558 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:08,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:08,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1826781103, now seen corresponding path program 256 times [2021-04-15 02:21:08,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:08,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354737318] [2021-04-15 02:21:08,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:08,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:08,659 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:08,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354737318] [2021-04-15 02:21:08,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616063586] [2021-04-15 02:21:08,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:08,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:21:08,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:08,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:08,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:08,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:08,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:21:08,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683080392] [2021-04-15 02:21:08,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:21:08,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:08,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:21:08,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:21:08,723 INFO L87 Difference]: Start difference. First operand 11079 states and 33221 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:09,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:09,046 INFO L93 Difference]: Finished difference Result 11467 states and 33833 transitions. [2021-04-15 02:21:09,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:21:09,046 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:09,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:09,066 INFO L225 Difference]: With dead ends: 11467 [2021-04-15 02:21:09,066 INFO L226 Difference]: Without dead ends: 11459 [2021-04-15 02:21:09,066 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 207.7ms TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:21:09,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11459 states. [2021-04-15 02:21:09,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11459 to 11123. [2021-04-15 02:21:09,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11123 states, 11122 states have (on average 2.999550440568243) internal successors, (33361), 11122 states have internal predecessors, (33361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:09,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11123 states to 11123 states and 33361 transitions. [2021-04-15 02:21:09,260 INFO L78 Accepts]: Start accepts. Automaton has 11123 states and 33361 transitions. Word has length 22 [2021-04-15 02:21:09,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:09,260 INFO L480 AbstractCegarLoop]: Abstraction has 11123 states and 33361 transitions. [2021-04-15 02:21:09,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:09,260 INFO L276 IsEmpty]: Start isEmpty. Operand 11123 states and 33361 transitions. [2021-04-15 02:21:09,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:09,272 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:09,272 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:09,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3265 [2021-04-15 02:21:09,473 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:09,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:09,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1995549679, now seen corresponding path program 257 times [2021-04-15 02:21:09,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:09,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542439986] [2021-04-15 02:21:09,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:09,558 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:09,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542439986] [2021-04-15 02:21:09,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052417468] [2021-04-15 02:21:09,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:09,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:21:09,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:09,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:09,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:09,628 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:09,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:09,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:21:09,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772776682] [2021-04-15 02:21:09,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:21:09,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:09,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:21:09,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:21:09,629 INFO L87 Difference]: Start difference. First operand 11123 states and 33361 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:09,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:09,859 INFO L93 Difference]: Finished difference Result 14272 states and 42332 transitions. [2021-04-15 02:21:09,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:21:09,860 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:09,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:09,878 INFO L225 Difference]: With dead ends: 14272 [2021-04-15 02:21:09,879 INFO L226 Difference]: Without dead ends: 14272 [2021-04-15 02:21:09,879 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:21:09,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14272 states. [2021-04-15 02:21:10,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14272 to 8542. [2021-04-15 02:21:10,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8542 states, 8541 states have (on average 2.9779885259337315) internal successors, (25435), 8541 states have internal predecessors, (25435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:10,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8542 states to 8542 states and 25435 transitions. [2021-04-15 02:21:10,024 INFO L78 Accepts]: Start accepts. Automaton has 8542 states and 25435 transitions. Word has length 22 [2021-04-15 02:21:10,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:10,024 INFO L480 AbstractCegarLoop]: Abstraction has 8542 states and 25435 transitions. [2021-04-15 02:21:10,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:10,024 INFO L276 IsEmpty]: Start isEmpty. Operand 8542 states and 25435 transitions. [2021-04-15 02:21:10,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:10,031 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:10,031 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:10,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3266,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:10,231 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:10,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:10,231 INFO L82 PathProgramCache]: Analyzing trace with hash -155561425, now seen corresponding path program 258 times [2021-04-15 02:21:10,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:10,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264954945] [2021-04-15 02:21:10,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:10,298 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:10,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264954945] [2021-04-15 02:21:10,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664434637] [2021-04-15 02:21:10,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:10,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:21:10,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:10,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:10,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:10,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:10,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:21:10,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738698284] [2021-04-15 02:21:10,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:21:10,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:10,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:21:10,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:21:10,370 INFO L87 Difference]: Start difference. First operand 8542 states and 25435 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:10,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:10,549 INFO L93 Difference]: Finished difference Result 9541 states and 27821 transitions. [2021-04-15 02:21:10,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:21:10,550 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:10,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:10,566 INFO L225 Difference]: With dead ends: 9541 [2021-04-15 02:21:10,567 INFO L226 Difference]: Without dead ends: 9541 [2021-04-15 02:21:10,567 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:21:10,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9541 states. [2021-04-15 02:21:10,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9541 to 8634. [2021-04-15 02:21:10,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8634 states, 8633 states have (on average 2.976833082358392) internal successors, (25699), 8633 states have internal predecessors, (25699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:10,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8634 states to 8634 states and 25699 transitions. [2021-04-15 02:21:10,716 INFO L78 Accepts]: Start accepts. Automaton has 8634 states and 25699 transitions. Word has length 22 [2021-04-15 02:21:10,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:10,716 INFO L480 AbstractCegarLoop]: Abstraction has 8634 states and 25699 transitions. [2021-04-15 02:21:10,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:10,716 INFO L276 IsEmpty]: Start isEmpty. Operand 8634 states and 25699 transitions. [2021-04-15 02:21:10,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:10,726 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:10,726 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:10,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3267,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:10,927 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:10,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:10,927 INFO L82 PathProgramCache]: Analyzing trace with hash 382294153, now seen corresponding path program 259 times [2021-04-15 02:21:10,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:10,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048868807] [2021-04-15 02:21:10,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:11,003 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:11,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048868807] [2021-04-15 02:21:11,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034344204] [2021-04-15 02:21:11,004 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:11,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:11,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:11,073 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:11,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:11,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:21:11,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185276053] [2021-04-15 02:21:11,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:21:11,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:11,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:21:11,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:21:11,073 INFO L87 Difference]: Start difference. First operand 8634 states and 25699 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:11,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:11,234 INFO L93 Difference]: Finished difference Result 9330 states and 27244 transitions. [2021-04-15 02:21:11,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:21:11,235 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:11,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:11,250 INFO L225 Difference]: With dead ends: 9330 [2021-04-15 02:21:11,251 INFO L226 Difference]: Without dead ends: 9330 [2021-04-15 02:21:11,251 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 129.3ms TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:21:11,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9330 states. [2021-04-15 02:21:11,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9330 to 6762. [2021-04-15 02:21:11,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6762 states, 6761 states have (on average 2.9630232214169503) internal successors, (20033), 6761 states have internal predecessors, (20033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:11,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6762 states to 6762 states and 20033 transitions. [2021-04-15 02:21:11,377 INFO L78 Accepts]: Start accepts. Automaton has 6762 states and 20033 transitions. Word has length 22 [2021-04-15 02:21:11,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:11,378 INFO L480 AbstractCegarLoop]: Abstraction has 6762 states and 20033 transitions. [2021-04-15 02:21:11,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:11,378 INFO L276 IsEmpty]: Start isEmpty. Operand 6762 states and 20033 transitions. [2021-04-15 02:21:11,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:11,384 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:11,384 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:11,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3268,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:11,585 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:11,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:11,585 INFO L82 PathProgramCache]: Analyzing trace with hash -124052113, now seen corresponding path program 260 times [2021-04-15 02:21:11,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:11,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284471951] [2021-04-15 02:21:11,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:11,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:11,665 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:11,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284471951] [2021-04-15 02:21:11,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150762899] [2021-04-15 02:21:11,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:11,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:21:11,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:11,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:11,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:11,734 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:11,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:11,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:21:11,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612899150] [2021-04-15 02:21:11,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:21:11,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:11,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:21:11,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:21:11,735 INFO L87 Difference]: Start difference. First operand 6762 states and 20033 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:11,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:11,880 INFO L93 Difference]: Finished difference Result 8299 states and 24037 transitions. [2021-04-15 02:21:11,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:21:11,881 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:11,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:11,925 INFO L225 Difference]: With dead ends: 8299 [2021-04-15 02:21:11,925 INFO L226 Difference]: Without dead ends: 8299 [2021-04-15 02:21:11,925 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 117.4ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:21:11,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8299 states. [2021-04-15 02:21:12,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8299 to 7676. [2021-04-15 02:21:12,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7676 states, 7675 states have (on average 2.9603908794788274) internal successors, (22721), 7675 states have internal predecessors, (22721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:12,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7676 states to 7676 states and 22721 transitions. [2021-04-15 02:21:12,037 INFO L78 Accepts]: Start accepts. Automaton has 7676 states and 22721 transitions. Word has length 22 [2021-04-15 02:21:12,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:12,037 INFO L480 AbstractCegarLoop]: Abstraction has 7676 states and 22721 transitions. [2021-04-15 02:21:12,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:12,037 INFO L276 IsEmpty]: Start isEmpty. Operand 7676 states and 22721 transitions. [2021-04-15 02:21:12,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:12,046 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:12,046 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:12,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3269,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:12,247 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:12,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:12,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1359082825, now seen corresponding path program 261 times [2021-04-15 02:21:12,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:12,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173335012] [2021-04-15 02:21:12,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:12,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173335012] [2021-04-15 02:21:12,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971343130] [2021-04-15 02:21:12,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:12,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:21:12,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:12,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:12,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:12,423 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:12,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:12,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:21:12,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752422587] [2021-04-15 02:21:12,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:21:12,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:12,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:21:12,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:21:12,425 INFO L87 Difference]: Start difference. First operand 7676 states and 22721 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:12,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:12,635 INFO L93 Difference]: Finished difference Result 8482 states and 24462 transitions. [2021-04-15 02:21:12,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:21:12,636 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:12,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:12,646 INFO L225 Difference]: With dead ends: 8482 [2021-04-15 02:21:12,647 INFO L226 Difference]: Without dead ends: 8482 [2021-04-15 02:21:12,647 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 187.6ms TimeCoverageRelationStatistics Valid=249, Invalid=507, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:21:12,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8482 states. [2021-04-15 02:21:12,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8482 to 7047. [2021-04-15 02:21:12,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7047 states, 7046 states have (on average 2.9541583877377233) internal successors, (20815), 7046 states have internal predecessors, (20815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:12,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7047 states to 7047 states and 20815 transitions. [2021-04-15 02:21:12,760 INFO L78 Accepts]: Start accepts. Automaton has 7047 states and 20815 transitions. Word has length 22 [2021-04-15 02:21:12,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:12,761 INFO L480 AbstractCegarLoop]: Abstraction has 7047 states and 20815 transitions. [2021-04-15 02:21:12,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:12,761 INFO L276 IsEmpty]: Start isEmpty. Operand 7047 states and 20815 transitions. [2021-04-15 02:21:12,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:12,766 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:12,766 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:12,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3270 [2021-04-15 02:21:12,967 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:12,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:12,967 INFO L82 PathProgramCache]: Analyzing trace with hash 91625647, now seen corresponding path program 262 times [2021-04-15 02:21:12,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:12,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972273065] [2021-04-15 02:21:12,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:12,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:13,048 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:13,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972273065] [2021-04-15 02:21:13,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760263639] [2021-04-15 02:21:13,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:13,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:21:13,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:13,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:13,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:13,110 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:13,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:13,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:21:13,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912542817] [2021-04-15 02:21:13,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:21:13,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:13,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:21:13,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:21:13,111 INFO L87 Difference]: Start difference. First operand 7047 states and 20815 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:13,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:13,425 INFO L93 Difference]: Finished difference Result 8517 states and 24388 transitions. [2021-04-15 02:21:13,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:21:13,426 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:13,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:13,441 INFO L225 Difference]: With dead ends: 8517 [2021-04-15 02:21:13,441 INFO L226 Difference]: Without dead ends: 8517 [2021-04-15 02:21:13,441 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 254.2ms TimeCoverageRelationStatistics Valid=447, Invalid=885, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 02:21:13,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8517 states. [2021-04-15 02:21:13,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8517 to 6822. [2021-04-15 02:21:13,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6822 states, 6821 states have (on average 2.9705321800322535) internal successors, (20262), 6821 states have internal predecessors, (20262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:13,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6822 states to 6822 states and 20262 transitions. [2021-04-15 02:21:13,565 INFO L78 Accepts]: Start accepts. Automaton has 6822 states and 20262 transitions. Word has length 22 [2021-04-15 02:21:13,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:13,565 INFO L480 AbstractCegarLoop]: Abstraction has 6822 states and 20262 transitions. [2021-04-15 02:21:13,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:13,565 INFO L276 IsEmpty]: Start isEmpty. Operand 6822 states and 20262 transitions. [2021-04-15 02:21:13,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:13,572 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:13,572 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:13,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3271 [2021-04-15 02:21:13,773 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:13,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:13,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1108198033, now seen corresponding path program 263 times [2021-04-15 02:21:13,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:13,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653470148] [2021-04-15 02:21:13,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:13,840 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:13,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653470148] [2021-04-15 02:21:13,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36327868] [2021-04-15 02:21:13,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:13,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:21:13,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:13,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:13,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:13,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:13,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:21:13,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629036246] [2021-04-15 02:21:13,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:21:13,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:13,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:21:13,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:21:13,905 INFO L87 Difference]: Start difference. First operand 6822 states and 20262 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:14,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:14,130 INFO L93 Difference]: Finished difference Result 7102 states and 20626 transitions. [2021-04-15 02:21:14,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:21:14,131 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:14,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:14,142 INFO L225 Difference]: With dead ends: 7102 [2021-04-15 02:21:14,142 INFO L226 Difference]: Without dead ends: 7096 [2021-04-15 02:21:14,143 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 153.7ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:21:14,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7096 states. [2021-04-15 02:21:14,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7096 to 6624. [2021-04-15 02:21:14,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6624 states, 6623 states have (on average 2.958930998037143) internal successors, (19597), 6623 states have internal predecessors, (19597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:14,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6624 states to 6624 states and 19597 transitions. [2021-04-15 02:21:14,258 INFO L78 Accepts]: Start accepts. Automaton has 6624 states and 19597 transitions. Word has length 22 [2021-04-15 02:21:14,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:14,258 INFO L480 AbstractCegarLoop]: Abstraction has 6624 states and 19597 transitions. [2021-04-15 02:21:14,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:14,259 INFO L276 IsEmpty]: Start isEmpty. Operand 6624 states and 19597 transitions. [2021-04-15 02:21:14,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:14,265 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:14,265 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:14,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3272 [2021-04-15 02:21:14,465 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:14,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:14,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1172512213, now seen corresponding path program 264 times [2021-04-15 02:21:14,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:14,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872044956] [2021-04-15 02:21:14,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:14,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:14,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872044956] [2021-04-15 02:21:14,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940233165] [2021-04-15 02:21:14,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:14,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:21:14,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:14,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:14,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:14,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:14,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:21:14,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481882794] [2021-04-15 02:21:14,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:21:14,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:14,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:21:14,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:21:14,626 INFO L87 Difference]: Start difference. First operand 6624 states and 19597 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:14,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:14,749 INFO L93 Difference]: Finished difference Result 6797 states and 19752 transitions. [2021-04-15 02:21:14,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:21:14,750 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:14,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:14,761 INFO L225 Difference]: With dead ends: 6797 [2021-04-15 02:21:14,761 INFO L226 Difference]: Without dead ends: 6795 [2021-04-15 02:21:14,761 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 117.9ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:21:14,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6795 states. [2021-04-15 02:21:14,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6795 to 6384. [2021-04-15 02:21:14,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6384 states, 6383 states have (on average 2.953313488955037) internal successors, (18851), 6383 states have internal predecessors, (18851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:14,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6384 states to 6384 states and 18851 transitions. [2021-04-15 02:21:14,867 INFO L78 Accepts]: Start accepts. Automaton has 6384 states and 18851 transitions. Word has length 22 [2021-04-15 02:21:14,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:14,867 INFO L480 AbstractCegarLoop]: Abstraction has 6384 states and 18851 transitions. [2021-04-15 02:21:14,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:14,867 INFO L276 IsEmpty]: Start isEmpty. Operand 6384 states and 18851 transitions. [2021-04-15 02:21:14,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:14,873 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:14,874 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:15,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3273 [2021-04-15 02:21:15,074 INFO L428 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:15,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:15,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1639320145, now seen corresponding path program 265 times [2021-04-15 02:21:15,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:15,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731849323] [2021-04-15 02:21:15,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:15,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731849323] [2021-04-15 02:21:15,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84365153] [2021-04-15 02:21:15,163 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:15,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:15,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:15,237 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:15,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:15,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:21:15,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527791520] [2021-04-15 02:21:15,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:21:15,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:15,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:21:15,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:21:15,238 INFO L87 Difference]: Start difference. First operand 6384 states and 18851 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:15,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:15,457 INFO L93 Difference]: Finished difference Result 6844 states and 19836 transitions. [2021-04-15 02:21:15,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:21:15,458 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:15,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:15,468 INFO L225 Difference]: With dead ends: 6844 [2021-04-15 02:21:15,469 INFO L226 Difference]: Without dead ends: 6844 [2021-04-15 02:21:15,469 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 196.6ms TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:21:15,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6844 states. [2021-04-15 02:21:15,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6844 to 5821. [2021-04-15 02:21:15,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5821 states, 5820 states have (on average 2.943986254295533) internal successors, (17134), 5820 states have internal predecessors, (17134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:15,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 17134 transitions. [2021-04-15 02:21:15,563 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 17134 transitions. Word has length 22 [2021-04-15 02:21:15,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:15,563 INFO L480 AbstractCegarLoop]: Abstraction has 5821 states and 17134 transitions. [2021-04-15 02:21:15,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:15,563 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 17134 transitions. [2021-04-15 02:21:15,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:15,569 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:15,569 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:15,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3274 [2021-04-15 02:21:15,769 INFO L428 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:15,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:15,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1388189973, now seen corresponding path program 266 times [2021-04-15 02:21:15,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:15,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315114361] [2021-04-15 02:21:15,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:15,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:15,855 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:15,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315114361] [2021-04-15 02:21:15,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003084162] [2021-04-15 02:21:15,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:15,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:21:15,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:15,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:15,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:15,926 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:15,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:15,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:21:15,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158235438] [2021-04-15 02:21:15,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:21:15,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:15,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:21:15,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:21:15,927 INFO L87 Difference]: Start difference. First operand 5821 states and 17134 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:16,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:16,214 INFO L93 Difference]: Finished difference Result 6844 states and 19503 transitions. [2021-04-15 02:21:16,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:21:16,215 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:16,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:16,221 INFO L225 Difference]: With dead ends: 6844 [2021-04-15 02:21:16,221 INFO L226 Difference]: Without dead ends: 6844 [2021-04-15 02:21:16,221 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 252.7ms TimeCoverageRelationStatistics Valid=478, Invalid=928, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 02:21:16,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6844 states. [2021-04-15 02:21:16,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6844 to 5659. [2021-04-15 02:21:16,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5659 states, 5658 states have (on average 2.957582184517497) internal successors, (16734), 5658 states have internal predecessors, (16734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:16,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5659 states to 5659 states and 16734 transitions. [2021-04-15 02:21:16,288 INFO L78 Accepts]: Start accepts. Automaton has 5659 states and 16734 transitions. Word has length 22 [2021-04-15 02:21:16,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:16,288 INFO L480 AbstractCegarLoop]: Abstraction has 5659 states and 16734 transitions. [2021-04-15 02:21:16,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:16,289 INFO L276 IsEmpty]: Start isEmpty. Operand 5659 states and 16734 transitions. [2021-04-15 02:21:16,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:16,294 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:16,294 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:16,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3275 [2021-04-15 02:21:16,495 INFO L428 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:16,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:16,495 INFO L82 PathProgramCache]: Analyzing trace with hash -2101570705, now seen corresponding path program 267 times [2021-04-15 02:21:16,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:16,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715075927] [2021-04-15 02:21:16,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:16,555 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:16,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715075927] [2021-04-15 02:21:16,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032376416] [2021-04-15 02:21:16,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:16,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:21:16,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:16,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:16,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:16,622 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:16,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:16,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:21:16,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889752981] [2021-04-15 02:21:16,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:21:16,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:16,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:21:16,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:21:16,623 INFO L87 Difference]: Start difference. First operand 5659 states and 16734 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:16,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:16,804 INFO L93 Difference]: Finished difference Result 5851 states and 16961 transitions. [2021-04-15 02:21:16,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:21:16,805 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:16,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:16,814 INFO L225 Difference]: With dead ends: 5851 [2021-04-15 02:21:16,814 INFO L226 Difference]: Without dead ends: 5847 [2021-04-15 02:21:16,814 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:21:16,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5847 states. [2021-04-15 02:21:16,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5847 to 5652. [2021-04-15 02:21:16,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5652 states, 5651 states have (on average 2.956290921960715) internal successors, (16706), 5651 states have internal predecessors, (16706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:16,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5652 states to 5652 states and 16706 transitions. [2021-04-15 02:21:16,905 INFO L78 Accepts]: Start accepts. Automaton has 5652 states and 16706 transitions. Word has length 22 [2021-04-15 02:21:16,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:16,905 INFO L480 AbstractCegarLoop]: Abstraction has 5652 states and 16706 transitions. [2021-04-15 02:21:16,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:16,905 INFO L276 IsEmpty]: Start isEmpty. Operand 5652 states and 16706 transitions. [2021-04-15 02:21:16,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:16,911 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:16,911 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:17,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3276 [2021-04-15 02:21:17,111 INFO L428 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:17,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:17,112 INFO L82 PathProgramCache]: Analyzing trace with hash -371100689, now seen corresponding path program 268 times [2021-04-15 02:21:17,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:17,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552423809] [2021-04-15 02:21:17,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:17,206 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:17,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552423809] [2021-04-15 02:21:17,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055052630] [2021-04-15 02:21:17,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:17,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:21:17,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:17,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:17,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:17,283 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:17,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:17,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:21:17,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272123501] [2021-04-15 02:21:17,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:21:17,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:17,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:21:17,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:21:17,284 INFO L87 Difference]: Start difference. First operand 5652 states and 16706 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:17,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:17,598 INFO L93 Difference]: Finished difference Result 7203 states and 20623 transitions. [2021-04-15 02:21:17,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:21:17,598 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:17,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:17,609 INFO L225 Difference]: With dead ends: 7203 [2021-04-15 02:21:17,610 INFO L226 Difference]: Without dead ends: 7203 [2021-04-15 02:21:17,610 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 256.9ms TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:21:17,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7203 states. [2021-04-15 02:21:17,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7203 to 6624. [2021-04-15 02:21:17,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6624 states, 6623 states have (on average 2.953042427902763) internal successors, (19558), 6623 states have internal predecessors, (19558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:17,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6624 states to 6624 states and 19558 transitions. [2021-04-15 02:21:17,717 INFO L78 Accepts]: Start accepts. Automaton has 6624 states and 19558 transitions. Word has length 22 [2021-04-15 02:21:17,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:17,717 INFO L480 AbstractCegarLoop]: Abstraction has 6624 states and 19558 transitions. [2021-04-15 02:21:17,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:17,717 INFO L276 IsEmpty]: Start isEmpty. Operand 6624 states and 19558 transitions. [2021-04-15 02:21:17,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:17,723 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:17,723 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:17,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3277,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:17,924 INFO L428 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:17,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:17,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1096732975, now seen corresponding path program 269 times [2021-04-15 02:21:17,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:17,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836295268] [2021-04-15 02:21:17,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:17,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:17,986 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:17,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836295268] [2021-04-15 02:21:17,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399815919] [2021-04-15 02:21:17,986 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:18,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:21:18,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:18,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:18,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:18,067 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:18,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:18,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:21:18,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29921189] [2021-04-15 02:21:18,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:21:18,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:18,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:21:18,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:21:18,069 INFO L87 Difference]: Start difference. First operand 6624 states and 19558 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:18,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:18,310 INFO L93 Difference]: Finished difference Result 6862 states and 19866 transitions. [2021-04-15 02:21:18,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:21:18,310 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:18,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:18,321 INFO L225 Difference]: With dead ends: 6862 [2021-04-15 02:21:18,321 INFO L226 Difference]: Without dead ends: 6858 [2021-04-15 02:21:18,321 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:21:18,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6858 states. [2021-04-15 02:21:18,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6858 to 6638. [2021-04-15 02:21:18,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6638 states, 6637 states have (on average 2.9532921500678015) internal successors, (19601), 6637 states have internal predecessors, (19601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:18,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6638 states to 6638 states and 19601 transitions. [2021-04-15 02:21:18,432 INFO L78 Accepts]: Start accepts. Automaton has 6638 states and 19601 transitions. Word has length 22 [2021-04-15 02:21:18,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:18,433 INFO L480 AbstractCegarLoop]: Abstraction has 6638 states and 19601 transitions. [2021-04-15 02:21:18,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:18,433 INFO L276 IsEmpty]: Start isEmpty. Operand 6638 states and 19601 transitions. [2021-04-15 02:21:18,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:18,440 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:18,440 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:18,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3278,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:18,640 INFO L428 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:18,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:18,640 INFO L82 PathProgramCache]: Analyzing trace with hash 621016085, now seen corresponding path program 270 times [2021-04-15 02:21:18,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:18,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563820393] [2021-04-15 02:21:18,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:18,702 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:18,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563820393] [2021-04-15 02:21:18,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681013095] [2021-04-15 02:21:18,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:18,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:21:18,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:18,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:18,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:18,775 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:18,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:18,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:21:18,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596394097] [2021-04-15 02:21:18,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:21:18,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:18,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:21:18,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:21:18,776 INFO L87 Difference]: Start difference. First operand 6638 states and 19601 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:18,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:18,894 INFO L93 Difference]: Finished difference Result 7175 states and 20692 transitions. [2021-04-15 02:21:18,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:21:18,895 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:18,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:18,903 INFO L225 Difference]: With dead ends: 7175 [2021-04-15 02:21:18,903 INFO L226 Difference]: Without dead ends: 7175 [2021-04-15 02:21:18,903 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=133, Invalid=209, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:21:18,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7175 states. [2021-04-15 02:21:18,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7175 to 6639. [2021-04-15 02:21:18,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6639 states, 6638 states have (on average 2.9528472431455257) internal successors, (19601), 6638 states have internal predecessors, (19601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:19,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6639 states to 6639 states and 19601 transitions. [2021-04-15 02:21:19,002 INFO L78 Accepts]: Start accepts. Automaton has 6639 states and 19601 transitions. Word has length 22 [2021-04-15 02:21:19,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:19,002 INFO L480 AbstractCegarLoop]: Abstraction has 6639 states and 19601 transitions. [2021-04-15 02:21:19,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:19,002 INFO L276 IsEmpty]: Start isEmpty. Operand 6639 states and 19601 transitions. [2021-04-15 02:21:19,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:19,007 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:19,007 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:19,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3279,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:19,208 INFO L428 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:19,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:19,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1108031249, now seen corresponding path program 271 times [2021-04-15 02:21:19,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:19,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322642444] [2021-04-15 02:21:19,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:19,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:19,262 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:19,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322642444] [2021-04-15 02:21:19,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678700857] [2021-04-15 02:21:19,262 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:19,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:19,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:19,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:19,329 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:19,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:19,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:21:19,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173215795] [2021-04-15 02:21:19,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:21:19,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:19,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:21:19,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:21:19,329 INFO L87 Difference]: Start difference. First operand 6639 states and 19601 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:19,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:19,495 INFO L93 Difference]: Finished difference Result 7416 states and 21327 transitions. [2021-04-15 02:21:19,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:21:19,496 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:19,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:19,505 INFO L225 Difference]: With dead ends: 7416 [2021-04-15 02:21:19,505 INFO L226 Difference]: Without dead ends: 7416 [2021-04-15 02:21:19,505 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 122.5ms TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:21:19,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7416 states. [2021-04-15 02:21:19,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7416 to 6639. [2021-04-15 02:21:19,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6639 states, 6638 states have (on average 2.9526965953600484) internal successors, (19600), 6638 states have internal predecessors, (19600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:19,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6639 states to 6639 states and 19600 transitions. [2021-04-15 02:21:19,616 INFO L78 Accepts]: Start accepts. Automaton has 6639 states and 19600 transitions. Word has length 22 [2021-04-15 02:21:19,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:19,616 INFO L480 AbstractCegarLoop]: Abstraction has 6639 states and 19600 transitions. [2021-04-15 02:21:19,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:19,616 INFO L276 IsEmpty]: Start isEmpty. Operand 6639 states and 19600 transitions. [2021-04-15 02:21:19,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:19,623 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:19,623 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:19,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3280 [2021-04-15 02:21:19,823 INFO L428 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:19,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:19,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1126076245, now seen corresponding path program 272 times [2021-04-15 02:21:19,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:19,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929155639] [2021-04-15 02:21:19,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:19,894 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:19,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929155639] [2021-04-15 02:21:19,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578837198] [2021-04-15 02:21:19,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:19,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:21:19,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:19,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:19,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:19,969 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:19,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:19,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:21:19,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940276183] [2021-04-15 02:21:19,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:21:19,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:19,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:21:19,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:21:19,970 INFO L87 Difference]: Start difference. First operand 6639 states and 19600 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:20,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:20,185 INFO L93 Difference]: Finished difference Result 7505 states and 21578 transitions. [2021-04-15 02:21:20,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:21:20,186 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:20,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:20,199 INFO L225 Difference]: With dead ends: 7505 [2021-04-15 02:21:20,199 INFO L226 Difference]: Without dead ends: 7505 [2021-04-15 02:21:20,199 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 167.3ms TimeCoverageRelationStatistics Valid=253, Invalid=449, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:21:20,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7505 states. [2021-04-15 02:21:20,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7505 to 6648. [2021-04-15 02:21:20,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6648 states, 6647 states have (on average 2.9527606438995035) internal successors, (19627), 6647 states have internal predecessors, (19627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:20,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6648 states to 6648 states and 19627 transitions. [2021-04-15 02:21:20,312 INFO L78 Accepts]: Start accepts. Automaton has 6648 states and 19627 transitions. Word has length 22 [2021-04-15 02:21:20,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:20,312 INFO L480 AbstractCegarLoop]: Abstraction has 6648 states and 19627 transitions. [2021-04-15 02:21:20,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:20,312 INFO L276 IsEmpty]: Start isEmpty. Operand 6648 states and 19627 transitions. [2021-04-15 02:21:20,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:20,319 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:20,319 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:20,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3281,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:20,519 INFO L428 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:20,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:20,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1663931823, now seen corresponding path program 273 times [2021-04-15 02:21:20,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:20,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629195022] [2021-04-15 02:21:20,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:20,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629195022] [2021-04-15 02:21:20,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659716984] [2021-04-15 02:21:20,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:20,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:21:20,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:20,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:20,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:20,674 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:20,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:20,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:21:20,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377133992] [2021-04-15 02:21:20,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:21:20,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:20,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:21:20,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:21:20,674 INFO L87 Difference]: Start difference. First operand 6648 states and 19627 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:20,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:20,879 INFO L93 Difference]: Finished difference Result 8295 states and 23872 transitions. [2021-04-15 02:21:20,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:21:20,880 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:20,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:20,895 INFO L225 Difference]: With dead ends: 8295 [2021-04-15 02:21:20,896 INFO L226 Difference]: Without dead ends: 8295 [2021-04-15 02:21:20,896 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 172.6ms TimeCoverageRelationStatistics Valid=246, Invalid=456, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:21:20,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8295 states. [2021-04-15 02:21:21,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8295 to 7544. [2021-04-15 02:21:21,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7544 states, 7543 states have (on average 2.966193822086703) internal successors, (22374), 7543 states have internal predecessors, (22374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:21,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7544 states to 7544 states and 22374 transitions. [2021-04-15 02:21:21,024 INFO L78 Accepts]: Start accepts. Automaton has 7544 states and 22374 transitions. Word has length 22 [2021-04-15 02:21:21,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:21,024 INFO L480 AbstractCegarLoop]: Abstraction has 7544 states and 22374 transitions. [2021-04-15 02:21:21,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:21,024 INFO L276 IsEmpty]: Start isEmpty. Operand 7544 states and 22374 transitions. [2021-04-15 02:21:21,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:21,033 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:21,033 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:21,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3282,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:21,234 INFO L428 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:21,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:21,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1157585557, now seen corresponding path program 274 times [2021-04-15 02:21:21,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:21,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297837820] [2021-04-15 02:21:21,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:21,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297837820] [2021-04-15 02:21:21,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300350533] [2021-04-15 02:21:21,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:21,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:21:21,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:21,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:21,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:21,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:21,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:21:21,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496076996] [2021-04-15 02:21:21,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:21:21,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:21,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:21:21,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:21:21,406 INFO L87 Difference]: Start difference. First operand 7544 states and 22374 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:21,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:21,596 INFO L93 Difference]: Finished difference Result 8145 states and 23520 transitions. [2021-04-15 02:21:21,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:21:21,597 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:21,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:21,610 INFO L225 Difference]: With dead ends: 8145 [2021-04-15 02:21:21,610 INFO L226 Difference]: Without dead ends: 8145 [2021-04-15 02:21:21,611 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 174.9ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:21:21,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8145 states. [2021-04-15 02:21:21,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8145 to 7488. [2021-04-15 02:21:21,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7488 states, 7487 states have (on average 2.9648724455723254) internal successors, (22198), 7487 states have internal predecessors, (22198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:21,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7488 states to 7488 states and 22198 transitions. [2021-04-15 02:21:21,737 INFO L78 Accepts]: Start accepts. Automaton has 7488 states and 22198 transitions. Word has length 22 [2021-04-15 02:21:21,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:21,737 INFO L480 AbstractCegarLoop]: Abstraction has 7488 states and 22198 transitions. [2021-04-15 02:21:21,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:21,737 INFO L276 IsEmpty]: Start isEmpty. Operand 7488 states and 22198 transitions. [2021-04-15 02:21:21,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:21,744 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:21,744 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:21,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3283 [2021-04-15 02:21:21,945 INFO L428 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:21,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:21,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1654246801, now seen corresponding path program 275 times [2021-04-15 02:21:21,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:21,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289040783] [2021-04-15 02:21:21,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:21,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:22,028 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:22,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289040783] [2021-04-15 02:21:22,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391091306] [2021-04-15 02:21:22,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:22,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:21:22,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:22,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:22,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:22,107 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:22,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:22,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:21:22,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125211371] [2021-04-15 02:21:22,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:21:22,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:22,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:21:22,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:21:22,108 INFO L87 Difference]: Start difference. First operand 7488 states and 22198 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:22,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:22,271 INFO L93 Difference]: Finished difference Result 9477 states and 27589 transitions. [2021-04-15 02:21:22,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:21:22,272 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:22,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:22,282 INFO L225 Difference]: With dead ends: 9477 [2021-04-15 02:21:22,283 INFO L226 Difference]: Without dead ends: 9477 [2021-04-15 02:21:22,283 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:21:22,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9477 states. [2021-04-15 02:21:22,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9477 to 8935. [2021-04-15 02:21:22,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8935 states, 8934 states have (on average 2.9705618983657938) internal successors, (26539), 8934 states have internal predecessors, (26539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:22,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8935 states to 8935 states and 26539 transitions. [2021-04-15 02:21:22,413 INFO L78 Accepts]: Start accepts. Automaton has 8935 states and 26539 transitions. Word has length 22 [2021-04-15 02:21:22,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:22,414 INFO L480 AbstractCegarLoop]: Abstraction has 8935 states and 26539 transitions. [2021-04-15 02:21:22,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:22,414 INFO L276 IsEmpty]: Start isEmpty. Operand 8935 states and 26539 transitions. [2021-04-15 02:21:22,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:22,421 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:22,421 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:22,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3284 [2021-04-15 02:21:22,621 INFO L428 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:22,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:22,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1373263317, now seen corresponding path program 276 times [2021-04-15 02:21:22,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:22,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864655482] [2021-04-15 02:21:22,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:22,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:22,705 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:22,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864655482] [2021-04-15 02:21:22,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028172885] [2021-04-15 02:21:22,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:22,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:21:22,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:22,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:22,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:22,777 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:22,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:22,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:21:22,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695515962] [2021-04-15 02:21:22,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:21:22,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:22,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:21:22,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:21:22,778 INFO L87 Difference]: Start difference. First operand 8935 states and 26539 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:23,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:23,064 INFO L93 Difference]: Finished difference Result 9543 states and 27760 transitions. [2021-04-15 02:21:23,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:21:23,065 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:23,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:23,081 INFO L225 Difference]: With dead ends: 9543 [2021-04-15 02:21:23,081 INFO L226 Difference]: Without dead ends: 9543 [2021-04-15 02:21:23,081 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 219.8ms TimeCoverageRelationStatistics Valid=322, Invalid=670, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:21:23,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9543 states. [2021-04-15 02:21:23,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9543 to 8928. [2021-04-15 02:21:23,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8928 states, 8927 states have (on average 2.9704267951159404) internal successors, (26517), 8927 states have internal predecessors, (26517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:23,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8928 states to 8928 states and 26517 transitions. [2021-04-15 02:21:23,224 INFO L78 Accepts]: Start accepts. Automaton has 8928 states and 26517 transitions. Word has length 22 [2021-04-15 02:21:23,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:23,224 INFO L480 AbstractCegarLoop]: Abstraction has 8928 states and 26517 transitions. [2021-04-15 02:21:23,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:23,224 INFO L276 IsEmpty]: Start isEmpty. Operand 8928 states and 26517 transitions. [2021-04-15 02:21:23,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:23,234 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:23,234 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:23,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3285 [2021-04-15 02:21:23,441 INFO L428 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:23,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:23,441 INFO L82 PathProgramCache]: Analyzing trace with hash 736796463, now seen corresponding path program 277 times [2021-04-15 02:21:23,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:23,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482691895] [2021-04-15 02:21:23,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:23,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482691895] [2021-04-15 02:21:23,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011830378] [2021-04-15 02:21:23,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:23,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:23,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:23,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:23,621 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:23,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:23,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:21:23,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41279174] [2021-04-15 02:21:23,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:21:23,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:23,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:21:23,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:21:23,622 INFO L87 Difference]: Start difference. First operand 8928 states and 26517 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:24,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:24,019 INFO L93 Difference]: Finished difference Result 10324 states and 30070 transitions. [2021-04-15 02:21:24,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:21:24,020 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:24,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:24,038 INFO L225 Difference]: With dead ends: 10324 [2021-04-15 02:21:24,038 INFO L226 Difference]: Without dead ends: 10324 [2021-04-15 02:21:24,038 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 334.4ms TimeCoverageRelationStatistics Valid=551, Invalid=1089, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 02:21:24,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10324 states. [2021-04-15 02:21:24,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10324 to 9639. [2021-04-15 02:21:24,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9639 states, 9638 states have (on average 2.9726084249844367) internal successors, (28650), 9638 states have internal predecessors, (28650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:24,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9639 states to 9639 states and 28650 transitions. [2021-04-15 02:21:24,195 INFO L78 Accepts]: Start accepts. Automaton has 9639 states and 28650 transitions. Word has length 22 [2021-04-15 02:21:24,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:24,195 INFO L480 AbstractCegarLoop]: Abstraction has 9639 states and 28650 transitions. [2021-04-15 02:21:24,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:24,195 INFO L276 IsEmpty]: Start isEmpty. Operand 9639 states and 28650 transitions. [2021-04-15 02:21:24,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:24,205 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:24,205 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:24,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3286,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:24,406 INFO L428 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:24,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:24,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1039148775, now seen corresponding path program 278 times [2021-04-15 02:21:24,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:24,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606155300] [2021-04-15 02:21:24,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:24,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:24,524 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:24,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606155300] [2021-04-15 02:21:24,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916701564] [2021-04-15 02:21:24,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:24,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:21:24,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:24,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:24,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:24,613 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:24,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:24,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-04-15 02:21:24,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979898500] [2021-04-15 02:21:24,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:21:24,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:24,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:21:24,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:21:24,614 INFO L87 Difference]: Start difference. First operand 9639 states and 28650 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:25,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:25,041 INFO L93 Difference]: Finished difference Result 9988 states and 29135 transitions. [2021-04-15 02:21:25,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:21:25,042 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:25,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:25,059 INFO L225 Difference]: With dead ends: 9988 [2021-04-15 02:21:25,060 INFO L226 Difference]: Without dead ends: 9980 [2021-04-15 02:21:25,060 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 329.2ms TimeCoverageRelationStatistics Valid=354, Invalid=702, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:21:25,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9980 states. [2021-04-15 02:21:25,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9980 to 9589. [2021-04-15 02:21:25,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9589 states, 9588 states have (on average 2.9695452649144762) internal successors, (28472), 9588 states have internal predecessors, (28472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:25,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9589 states to 9589 states and 28472 transitions. [2021-04-15 02:21:25,236 INFO L78 Accepts]: Start accepts. Automaton has 9589 states and 28472 transitions. Word has length 22 [2021-04-15 02:21:25,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:25,236 INFO L480 AbstractCegarLoop]: Abstraction has 9589 states and 28472 transitions. [2021-04-15 02:21:25,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:25,237 INFO L276 IsEmpty]: Start isEmpty. Operand 9589 states and 28472 transitions. [2021-04-15 02:21:25,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:25,247 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:25,247 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:25,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3287 [2021-04-15 02:21:25,447 INFO L428 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:25,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:25,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1158733017, now seen corresponding path program 279 times [2021-04-15 02:21:25,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:25,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112949186] [2021-04-15 02:21:25,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:25,556 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:25,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112949186] [2021-04-15 02:21:25,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833581664] [2021-04-15 02:21:25,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:25,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:21:25,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:25,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:25,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:25,638 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:25,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:25,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:21:25,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984344512] [2021-04-15 02:21:25,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:21:25,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:25,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:21:25,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:21:25,639 INFO L87 Difference]: Start difference. First operand 9589 states and 28472 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:26,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:26,073 INFO L93 Difference]: Finished difference Result 11995 states and 35313 transitions. [2021-04-15 02:21:26,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 02:21:26,074 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:26,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:26,089 INFO L225 Difference]: With dead ends: 11995 [2021-04-15 02:21:26,089 INFO L226 Difference]: Without dead ends: 11995 [2021-04-15 02:21:26,089 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 400.4ms TimeCoverageRelationStatistics Valid=699, Invalid=1371, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 02:21:26,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11995 states. [2021-04-15 02:21:26,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11995 to 9342. [2021-04-15 02:21:26,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9342 states, 9341 states have (on average 2.9680976340862864) internal successors, (27725), 9341 states have internal predecessors, (27725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:26,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9342 states to 9342 states and 27725 transitions. [2021-04-15 02:21:26,252 INFO L78 Accepts]: Start accepts. Automaton has 9342 states and 27725 transitions. Word has length 22 [2021-04-15 02:21:26,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:26,252 INFO L480 AbstractCegarLoop]: Abstraction has 9342 states and 27725 transitions. [2021-04-15 02:21:26,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:26,252 INFO L276 IsEmpty]: Start isEmpty. Operand 9342 states and 27725 transitions. [2021-04-15 02:21:26,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:26,260 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:26,260 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:26,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3288,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:26,469 INFO L428 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:26,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:26,470 INFO L82 PathProgramCache]: Analyzing trace with hash 876299495, now seen corresponding path program 280 times [2021-04-15 02:21:26,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:26,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092590341] [2021-04-15 02:21:26,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:26,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:26,552 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:26,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092590341] [2021-04-15 02:21:26,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273180354] [2021-04-15 02:21:26,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:26,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:21:26,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:26,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:26,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:26,638 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:26,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:26,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-04-15 02:21:26,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435895784] [2021-04-15 02:21:26,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:21:26,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:26,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:21:26,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:21:26,639 INFO L87 Difference]: Start difference. First operand 9342 states and 27725 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:26,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:26,964 INFO L93 Difference]: Finished difference Result 9981 states and 29225 transitions. [2021-04-15 02:21:26,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:21:26,965 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:26,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:26,982 INFO L225 Difference]: With dead ends: 9981 [2021-04-15 02:21:26,982 INFO L226 Difference]: Without dead ends: 9981 [2021-04-15 02:21:26,982 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 279.0ms TimeCoverageRelationStatistics Valid=401, Invalid=789, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:21:26,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9981 states. [2021-04-15 02:21:27,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9981 to 9425. [2021-04-15 02:21:27,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9425 states, 9424 states have (on average 2.9691213921901527) internal successors, (27981), 9424 states have internal predecessors, (27981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:27,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9425 states to 9425 states and 27981 transitions. [2021-04-15 02:21:27,134 INFO L78 Accepts]: Start accepts. Automaton has 9425 states and 27981 transitions. Word has length 22 [2021-04-15 02:21:27,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:27,134 INFO L480 AbstractCegarLoop]: Abstraction has 9425 states and 27981 transitions. [2021-04-15 02:21:27,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:27,134 INFO L276 IsEmpty]: Start isEmpty. Operand 9425 states and 27981 transitions. [2021-04-15 02:21:27,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:27,144 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:27,145 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:27,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3289,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:27,345 INFO L428 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:27,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:27,345 INFO L82 PathProgramCache]: Analyzing trace with hash 369953229, now seen corresponding path program 281 times [2021-04-15 02:21:27,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:27,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713165944] [2021-04-15 02:21:27,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:27,464 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:27,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713165944] [2021-04-15 02:21:27,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628643074] [2021-04-15 02:21:27,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:27,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:21:27,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:27,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:27,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:27,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:27,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-04-15 02:21:27,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310765438] [2021-04-15 02:21:27,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:21:27,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:27,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:21:27,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:21:27,553 INFO L87 Difference]: Start difference. First operand 9425 states and 27981 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:27,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:27,889 INFO L93 Difference]: Finished difference Result 9826 states and 28836 transitions. [2021-04-15 02:21:27,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:21:27,890 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:27,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:27,906 INFO L225 Difference]: With dead ends: 9826 [2021-04-15 02:21:27,906 INFO L226 Difference]: Without dead ends: 9826 [2021-04-15 02:21:27,906 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 318.0ms TimeCoverageRelationStatistics Valid=422, Invalid=838, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 02:21:27,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9826 states. [2021-04-15 02:21:28,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9826 to 8609. [2021-04-15 02:21:28,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8609 states, 8608 states have (on average 2.963638475836431) internal successors, (25511), 8608 states have internal predecessors, (25511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:28,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8609 states to 8609 states and 25511 transitions. [2021-04-15 02:21:28,053 INFO L78 Accepts]: Start accepts. Automaton has 8609 states and 25511 transitions. Word has length 22 [2021-04-15 02:21:28,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:28,053 INFO L480 AbstractCegarLoop]: Abstraction has 8609 states and 25511 transitions. [2021-04-15 02:21:28,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:28,053 INFO L276 IsEmpty]: Start isEmpty. Operand 8609 states and 25511 transitions. [2021-04-15 02:21:28,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:28,063 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:28,063 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:28,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3290 [2021-04-15 02:21:28,263 INFO L428 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:28,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:28,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1853088167, now seen corresponding path program 282 times [2021-04-15 02:21:28,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:28,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678445174] [2021-04-15 02:21:28,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:28,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:28,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678445174] [2021-04-15 02:21:28,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617076576] [2021-04-15 02:21:28,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:28,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:21:28,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:28,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:28,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:28,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:28,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-04-15 02:21:28,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307766890] [2021-04-15 02:21:28,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:21:28,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:28,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:21:28,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:21:28,457 INFO L87 Difference]: Start difference. First operand 8609 states and 25511 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:28,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:28,769 INFO L93 Difference]: Finished difference Result 9527 states and 27764 transitions. [2021-04-15 02:21:28,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:21:28,770 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:28,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:28,785 INFO L225 Difference]: With dead ends: 9527 [2021-04-15 02:21:28,785 INFO L226 Difference]: Without dead ends: 9527 [2021-04-15 02:21:28,785 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 278.3ms TimeCoverageRelationStatistics Valid=302, Invalid=690, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:21:28,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9527 states. [2021-04-15 02:21:28,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9527 to 9038. [2021-04-15 02:21:28,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9038 states, 9037 states have (on average 2.9622662387960608) internal successors, (26770), 9037 states have internal predecessors, (26770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:28,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9038 states to 9038 states and 26770 transitions. [2021-04-15 02:21:28,925 INFO L78 Accepts]: Start accepts. Automaton has 9038 states and 26770 transitions. Word has length 22 [2021-04-15 02:21:28,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:28,925 INFO L480 AbstractCegarLoop]: Abstraction has 9038 states and 26770 transitions. [2021-04-15 02:21:28,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:28,925 INFO L276 IsEmpty]: Start isEmpty. Operand 9038 states and 26770 transitions. [2021-04-15 02:21:28,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:28,934 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:28,934 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:29,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3291,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:29,135 INFO L428 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:29,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:29,135 INFO L82 PathProgramCache]: Analyzing trace with hash 585630989, now seen corresponding path program 283 times [2021-04-15 02:21:29,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:29,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410436173] [2021-04-15 02:21:29,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:29,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410436173] [2021-04-15 02:21:29,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468353227] [2021-04-15 02:21:29,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:29,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:29,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:29,380 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:29,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:29,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:21:29,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111978777] [2021-04-15 02:21:29,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:21:29,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:29,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:21:29,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:21:29,381 INFO L87 Difference]: Start difference. First operand 9038 states and 26770 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:29,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:29,842 INFO L93 Difference]: Finished difference Result 9636 states and 28011 transitions. [2021-04-15 02:21:29,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:21:29,843 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:29,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:29,858 INFO L225 Difference]: With dead ends: 9636 [2021-04-15 02:21:29,858 INFO L226 Difference]: Without dead ends: 9636 [2021-04-15 02:21:29,859 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 397.2ms TimeCoverageRelationStatistics Valid=626, Invalid=1266, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 02:21:29,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9636 states. [2021-04-15 02:21:29,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9636 to 8808. [2021-04-15 02:21:29,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8808 states, 8807 states have (on average 2.9608266151924605) internal successors, (26076), 8807 states have internal predecessors, (26076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:29,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8808 states to 8808 states and 26076 transitions. [2021-04-15 02:21:29,999 INFO L78 Accepts]: Start accepts. Automaton has 8808 states and 26076 transitions. Word has length 22 [2021-04-15 02:21:29,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:29,999 INFO L480 AbstractCegarLoop]: Abstraction has 8808 states and 26076 transitions. [2021-04-15 02:21:29,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:29,999 INFO L276 IsEmpty]: Start isEmpty. Operand 8808 states and 26076 transitions. [2021-04-15 02:21:30,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:30,007 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:30,007 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:30,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3292 [2021-04-15 02:21:30,208 INFO L428 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:30,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:30,208 INFO L82 PathProgramCache]: Analyzing trace with hash -50835865, now seen corresponding path program 284 times [2021-04-15 02:21:30,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:30,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002544885] [2021-04-15 02:21:30,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:30,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:30,306 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:30,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002544885] [2021-04-15 02:21:30,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222685614] [2021-04-15 02:21:30,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:30,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:21:30,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:30,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:30,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:30,407 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:30,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:30,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:21:30,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165536309] [2021-04-15 02:21:30,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:21:30,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:30,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:21:30,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:21:30,407 INFO L87 Difference]: Start difference. First operand 8808 states and 26076 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:30,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:30,890 INFO L93 Difference]: Finished difference Result 9760 states and 28323 transitions. [2021-04-15 02:21:30,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 02:21:30,891 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:30,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:30,910 INFO L225 Difference]: With dead ends: 9760 [2021-04-15 02:21:30,910 INFO L226 Difference]: Without dead ends: 9760 [2021-04-15 02:21:30,911 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 417.5ms TimeCoverageRelationStatistics Valid=708, Invalid=1454, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 02:21:30,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9760 states. [2021-04-15 02:21:31,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9760 to 8633. [2021-04-15 02:21:31,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8633 states, 8632 states have (on average 2.9661723818350323) internal successors, (25604), 8632 states have internal predecessors, (25604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:31,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8633 states to 8633 states and 25604 transitions. [2021-04-15 02:21:31,059 INFO L78 Accepts]: Start accepts. Automaton has 8633 states and 25604 transitions. Word has length 22 [2021-04-15 02:21:31,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:31,059 INFO L480 AbstractCegarLoop]: Abstraction has 8633 states and 25604 transitions. [2021-04-15 02:21:31,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:31,059 INFO L276 IsEmpty]: Start isEmpty. Operand 8633 states and 25604 transitions. [2021-04-15 02:21:31,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:31,069 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:31,069 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:31,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3293 [2021-04-15 02:21:31,270 INFO L428 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:31,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:31,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1859354147, now seen corresponding path program 285 times [2021-04-15 02:21:31,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:31,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487809219] [2021-04-15 02:21:31,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:31,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:31,379 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:31,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487809219] [2021-04-15 02:21:31,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058899699] [2021-04-15 02:21:31,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:31,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:21:31,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:31,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:31,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:31,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:31,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-04-15 02:21:31,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067458511] [2021-04-15 02:21:31,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:21:31,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:31,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:21:31,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:21:31,469 INFO L87 Difference]: Start difference. First operand 8633 states and 25604 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:31,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:31,771 INFO L93 Difference]: Finished difference Result 8906 states and 25958 transitions. [2021-04-15 02:21:31,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:21:31,772 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:31,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:31,787 INFO L225 Difference]: With dead ends: 8906 [2021-04-15 02:21:31,787 INFO L226 Difference]: Without dead ends: 8900 [2021-04-15 02:21:31,787 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 251.9ms TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:21:31,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8900 states. [2021-04-15 02:21:31,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8900 to 8631. [2021-04-15 02:21:31,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8631 states, 8630 states have (on average 2.9648899188876014) internal successors, (25587), 8630 states have internal predecessors, (25587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:31,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8631 states to 8631 states and 25587 transitions. [2021-04-15 02:21:31,942 INFO L78 Accepts]: Start accepts. Automaton has 8631 states and 25587 transitions. Word has length 22 [2021-04-15 02:21:31,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:31,942 INFO L480 AbstractCegarLoop]: Abstraction has 8631 states and 25587 transitions. [2021-04-15 02:21:31,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:31,942 INFO L276 IsEmpty]: Start isEmpty. Operand 8631 states and 25587 transitions. [2021-04-15 02:21:31,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:31,951 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:31,951 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:32,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3294,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:32,152 INFO L428 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:32,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:32,152 INFO L82 PathProgramCache]: Analyzing trace with hash -903090687, now seen corresponding path program 286 times [2021-04-15 02:21:32,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:32,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729871235] [2021-04-15 02:21:32,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:32,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:32,256 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:32,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729871235] [2021-04-15 02:21:32,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015695293] [2021-04-15 02:21:32,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:32,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:21:32,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:32,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:32,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:32,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:32,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-04-15 02:21:32,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020170956] [2021-04-15 02:21:32,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:21:32,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:32,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:21:32,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:21:32,354 INFO L87 Difference]: Start difference. First operand 8631 states and 25587 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:32,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:32,650 INFO L93 Difference]: Finished difference Result 9990 states and 29311 transitions. [2021-04-15 02:21:32,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:21:32,651 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:32,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:32,668 INFO L225 Difference]: With dead ends: 9990 [2021-04-15 02:21:32,668 INFO L226 Difference]: Without dead ends: 9990 [2021-04-15 02:21:32,668 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 277.2ms TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:21:32,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9990 states. [2021-04-15 02:21:32,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9990 to 9751. [2021-04-15 02:21:32,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9751 states, 9750 states have (on average 2.9663589743589744) internal successors, (28922), 9750 states have internal predecessors, (28922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:32,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9751 states to 9751 states and 28922 transitions. [2021-04-15 02:21:32,850 INFO L78 Accepts]: Start accepts. Automaton has 9751 states and 28922 transitions. Word has length 22 [2021-04-15 02:21:32,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:32,850 INFO L480 AbstractCegarLoop]: Abstraction has 9751 states and 28922 transitions. [2021-04-15 02:21:32,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:32,851 INFO L276 IsEmpty]: Start isEmpty. Operand 9751 states and 28922 transitions. [2021-04-15 02:21:32,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:32,861 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:32,861 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:33,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3295 [2021-04-15 02:21:33,061 INFO L428 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:33,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:33,062 INFO L82 PathProgramCache]: Analyzing trace with hash 2124419431, now seen corresponding path program 287 times [2021-04-15 02:21:33,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:33,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248080658] [2021-04-15 02:21:33,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:33,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248080658] [2021-04-15 02:21:33,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624036083] [2021-04-15 02:21:33,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:33,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:21:33,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:33,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:33,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:33,271 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:33,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:33,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-04-15 02:21:33,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602107788] [2021-04-15 02:21:33,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:21:33,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:33,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:21:33,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:21:33,272 INFO L87 Difference]: Start difference. First operand 9751 states and 28922 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:33,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:33,704 INFO L93 Difference]: Finished difference Result 10086 states and 29515 transitions. [2021-04-15 02:21:33,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:21:33,705 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:33,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:33,722 INFO L225 Difference]: With dead ends: 10086 [2021-04-15 02:21:33,722 INFO L226 Difference]: Without dead ends: 10086 [2021-04-15 02:21:33,723 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 373.5ms TimeCoverageRelationStatistics Valid=548, Invalid=1174, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 02:21:33,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10086 states. [2021-04-15 02:21:33,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10086 to 9761. [2021-04-15 02:21:33,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9761 states, 9760 states have (on average 2.966393442622951) internal successors, (28952), 9760 states have internal predecessors, (28952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:33,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9761 states to 9761 states and 28952 transitions. [2021-04-15 02:21:33,879 INFO L78 Accepts]: Start accepts. Automaton has 9761 states and 28952 transitions. Word has length 22 [2021-04-15 02:21:33,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:33,879 INFO L480 AbstractCegarLoop]: Abstraction has 9761 states and 28952 transitions. [2021-04-15 02:21:33,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:33,879 INFO L276 IsEmpty]: Start isEmpty. Operand 9761 states and 28952 transitions. [2021-04-15 02:21:33,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:33,890 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:33,890 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:34,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3296,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:34,090 INFO L428 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:34,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:34,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1487952577, now seen corresponding path program 288 times [2021-04-15 02:21:34,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:34,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88241389] [2021-04-15 02:21:34,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:34,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:34,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88241389] [2021-04-15 02:21:34,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530607863] [2021-04-15 02:21:34,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:34,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:21:34,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:34,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:34,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:34,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:34,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-04-15 02:21:34,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069174011] [2021-04-15 02:21:34,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:21:34,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:34,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:21:34,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:21:34,300 INFO L87 Difference]: Start difference. First operand 9761 states and 28952 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:34,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:34,751 INFO L93 Difference]: Finished difference Result 11404 states and 33374 transitions. [2021-04-15 02:21:34,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 02:21:34,751 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:34,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:34,763 INFO L225 Difference]: With dead ends: 11404 [2021-04-15 02:21:34,763 INFO L226 Difference]: Without dead ends: 11404 [2021-04-15 02:21:34,763 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 408.4ms TimeCoverageRelationStatistics Valid=666, Invalid=1404, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 02:21:34,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11404 states. [2021-04-15 02:21:34,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11404 to 10779. [2021-04-15 02:21:34,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10779 states, 10778 states have (on average 2.9689181666357394) internal successors, (31999), 10778 states have internal predecessors, (31999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:34,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10779 states to 10779 states and 31999 transitions. [2021-04-15 02:21:34,919 INFO L78 Accepts]: Start accepts. Automaton has 10779 states and 31999 transitions. Word has length 22 [2021-04-15 02:21:34,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:34,919 INFO L480 AbstractCegarLoop]: Abstraction has 10779 states and 31999 transitions. [2021-04-15 02:21:34,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:34,919 INFO L276 IsEmpty]: Start isEmpty. Operand 10779 states and 31999 transitions. [2021-04-15 02:21:34,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:34,931 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:34,931 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:35,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3297 [2021-04-15 02:21:35,132 INFO L428 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:35,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:35,132 INFO L82 PathProgramCache]: Analyzing trace with hash -53850265, now seen corresponding path program 289 times [2021-04-15 02:21:35,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:35,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994133675] [2021-04-15 02:21:35,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:35,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:35,243 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:35,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994133675] [2021-04-15 02:21:35,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801499985] [2021-04-15 02:21:35,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:35,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:35,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:35,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:35,316 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:35,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:35,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 16 [2021-04-15 02:21:35,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661586179] [2021-04-15 02:21:35,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:21:35,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:35,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:21:35,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:21:35,317 INFO L87 Difference]: Start difference. First operand 10779 states and 31999 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:35,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:35,647 INFO L93 Difference]: Finished difference Result 10976 states and 32234 transitions. [2021-04-15 02:21:35,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:21:35,648 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:35,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:35,666 INFO L225 Difference]: With dead ends: 10976 [2021-04-15 02:21:35,666 INFO L226 Difference]: Without dead ends: 10972 [2021-04-15 02:21:35,666 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 236.3ms TimeCoverageRelationStatistics Valid=266, Invalid=546, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:21:35,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10972 states. [2021-04-15 02:21:35,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10972 to 10779. [2021-04-15 02:21:35,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10779 states, 10778 states have (on average 2.9686398218593433) internal successors, (31996), 10778 states have internal predecessors, (31996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:35,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10779 states to 10779 states and 31996 transitions. [2021-04-15 02:21:35,840 INFO L78 Accepts]: Start accepts. Automaton has 10779 states and 31996 transitions. Word has length 22 [2021-04-15 02:21:35,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:35,840 INFO L480 AbstractCegarLoop]: Abstraction has 10779 states and 31996 transitions. [2021-04-15 02:21:35,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:35,840 INFO L276 IsEmpty]: Start isEmpty. Operand 10779 states and 31996 transitions. [2021-04-15 02:21:35,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:35,852 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:35,852 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:36,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3298 [2021-04-15 02:21:36,052 INFO L428 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:36,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:36,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1510450393, now seen corresponding path program 290 times [2021-04-15 02:21:36,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:36,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192911958] [2021-04-15 02:21:36,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:36,169 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:36,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192911958] [2021-04-15 02:21:36,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903031149] [2021-04-15 02:21:36,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:36,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:21:36,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:36,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:36,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:36,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:36,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2021-04-15 02:21:36,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406381355] [2021-04-15 02:21:36,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 02:21:36,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:36,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 02:21:36,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:21:36,353 INFO L87 Difference]: Start difference. First operand 10779 states and 31996 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:36,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:36,794 INFO L93 Difference]: Finished difference Result 13145 states and 38658 transitions. [2021-04-15 02:21:36,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:21:36,795 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:36,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:36,820 INFO L225 Difference]: With dead ends: 13145 [2021-04-15 02:21:36,820 INFO L226 Difference]: Without dead ends: 13145 [2021-04-15 02:21:36,821 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 404.2ms TimeCoverageRelationStatistics Valid=549, Invalid=1257, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 02:21:36,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13145 states. [2021-04-15 02:21:36,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13145 to 12431. [2021-04-15 02:21:37,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12431 states, 12430 states have (on average 2.9723250201126308) internal successors, (36946), 12430 states have internal predecessors, (36946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:37,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12431 states to 12431 states and 36946 transitions. [2021-04-15 02:21:37,040 INFO L78 Accepts]: Start accepts. Automaton has 12431 states and 36946 transitions. Word has length 22 [2021-04-15 02:21:37,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:37,040 INFO L480 AbstractCegarLoop]: Abstraction has 12431 states and 36946 transitions. [2021-04-15 02:21:37,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:37,040 INFO L276 IsEmpty]: Start isEmpty. Operand 12431 states and 36946 transitions. [2021-04-15 02:21:37,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:37,053 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:37,054 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:37,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3299,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:37,254 INFO L428 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:37,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:37,254 INFO L82 PathProgramCache]: Analyzing trace with hash -808303197, now seen corresponding path program 291 times [2021-04-15 02:21:37,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:37,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344432376] [2021-04-15 02:21:37,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:37,369 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:37,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344432376] [2021-04-15 02:21:37,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909692713] [2021-04-15 02:21:37,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:37,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:21:37,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:37,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:37,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:37,460 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:37,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:37,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 16 [2021-04-15 02:21:37,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460028338] [2021-04-15 02:21:37,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:21:37,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:37,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:21:37,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:21:37,462 INFO L87 Difference]: Start difference. First operand 12431 states and 36946 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:37,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:37,739 INFO L93 Difference]: Finished difference Result 12636 states and 37217 transitions. [2021-04-15 02:21:37,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:21:37,739 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:37,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:37,763 INFO L225 Difference]: With dead ends: 12636 [2021-04-15 02:21:37,764 INFO L226 Difference]: Without dead ends: 12634 [2021-04-15 02:21:37,764 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 199.9ms TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:21:37,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12634 states. [2021-04-15 02:21:37,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12634 to 12451. [2021-04-15 02:21:37,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12451 states, 12450 states have (on average 2.972690763052209) internal successors, (37010), 12450 states have internal predecessors, (37010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:37,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12451 states to 12451 states and 37010 transitions. [2021-04-15 02:21:37,991 INFO L78 Accepts]: Start accepts. Automaton has 12451 states and 37010 transitions. Word has length 22 [2021-04-15 02:21:37,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:37,991 INFO L480 AbstractCegarLoop]: Abstraction has 12451 states and 37010 transitions. [2021-04-15 02:21:37,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:37,992 INFO L276 IsEmpty]: Start isEmpty. Operand 12451 states and 37010 transitions. [2021-04-15 02:21:38,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:38,005 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:38,005 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:38,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3300,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:38,205 INFO L428 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:38,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:38,205 INFO L82 PathProgramCache]: Analyzing trace with hash 909445863, now seen corresponding path program 292 times [2021-04-15 02:21:38,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:38,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495683319] [2021-04-15 02:21:38,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:38,316 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:38,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495683319] [2021-04-15 02:21:38,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054992377] [2021-04-15 02:21:38,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:38,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:21:38,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:38,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:38,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:38,391 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:38,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:38,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 16 [2021-04-15 02:21:38,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596336846] [2021-04-15 02:21:38,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:21:38,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:38,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:21:38,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:21:38,392 INFO L87 Difference]: Start difference. First operand 12451 states and 37010 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:38,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:38,601 INFO L93 Difference]: Finished difference Result 13016 states and 38296 transitions. [2021-04-15 02:21:38,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:21:38,602 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:38,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:38,617 INFO L225 Difference]: With dead ends: 13016 [2021-04-15 02:21:38,617 INFO L226 Difference]: Without dead ends: 13016 [2021-04-15 02:21:38,618 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 205.3ms TimeCoverageRelationStatistics Valid=266, Invalid=546, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:21:38,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13016 states. [2021-04-15 02:21:38,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13016 to 12452. [2021-04-15 02:21:38,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12452 states, 12451 states have (on average 2.9725323267207453) internal successors, (37011), 12451 states have internal predecessors, (37011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:38,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12452 states to 12452 states and 37011 transitions. [2021-04-15 02:21:38,789 INFO L78 Accepts]: Start accepts. Automaton has 12452 states and 37011 transitions. Word has length 22 [2021-04-15 02:21:38,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:38,789 INFO L480 AbstractCegarLoop]: Abstraction has 12452 states and 37011 transitions. [2021-04-15 02:21:38,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:38,789 INFO L276 IsEmpty]: Start isEmpty. Operand 12452 states and 37011 transitions. [2021-04-15 02:21:38,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:38,798 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:38,798 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:38,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3301,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:38,999 INFO L428 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:38,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:38,999 INFO L82 PathProgramCache]: Analyzing trace with hash -819601471, now seen corresponding path program 293 times [2021-04-15 02:21:38,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:38,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021285296] [2021-04-15 02:21:38,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:39,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:39,107 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:39,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021285296] [2021-04-15 02:21:39,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291023123] [2021-04-15 02:21:39,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:39,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:21:39,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:39,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:39,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:39,204 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:39,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:39,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 17 [2021-04-15 02:21:39,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790760325] [2021-04-15 02:21:39,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:21:39,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:39,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:21:39,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:21:39,205 INFO L87 Difference]: Start difference. First operand 12452 states and 37011 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:39,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:39,550 INFO L93 Difference]: Finished difference Result 13404 states and 39370 transitions. [2021-04-15 02:21:39,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:21:39,551 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:39,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:39,576 INFO L225 Difference]: With dead ends: 13404 [2021-04-15 02:21:39,576 INFO L226 Difference]: Without dead ends: 13404 [2021-04-15 02:21:39,577 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 313.5ms TimeCoverageRelationStatistics Valid=375, Invalid=815, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:21:39,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13404 states. [2021-04-15 02:21:39,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13404 to 12456. [2021-04-15 02:21:39,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12456 states, 12455 states have (on average 2.972380570052188) internal successors, (37021), 12455 states have internal predecessors, (37021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:39,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12456 states to 12456 states and 37021 transitions. [2021-04-15 02:21:39,792 INFO L78 Accepts]: Start accepts. Automaton has 12456 states and 37021 transitions. Word has length 22 [2021-04-15 02:21:39,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:39,792 INFO L480 AbstractCegarLoop]: Abstraction has 12456 states and 37021 transitions. [2021-04-15 02:21:39,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:39,792 INFO L276 IsEmpty]: Start isEmpty. Operand 12456 states and 37021 transitions. [2021-04-15 02:21:39,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:39,806 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:39,806 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:40,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3302,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:40,006 INFO L428 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:40,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:40,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1414506023, now seen corresponding path program 294 times [2021-04-15 02:21:40,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:40,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644506453] [2021-04-15 02:21:40,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:40,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:40,131 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:40,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644506453] [2021-04-15 02:21:40,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147977784] [2021-04-15 02:21:40,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:40,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:21:40,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:40,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:40,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:40,226 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:40,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:40,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 17 [2021-04-15 02:21:40,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695928609] [2021-04-15 02:21:40,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:21:40,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:40,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:21:40,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:21:40,227 INFO L87 Difference]: Start difference. First operand 12456 states and 37021 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:40,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:40,645 INFO L93 Difference]: Finished difference Result 15061 states and 44163 transitions. [2021-04-15 02:21:40,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:21:40,646 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:40,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:40,676 INFO L225 Difference]: With dead ends: 15061 [2021-04-15 02:21:40,676 INFO L226 Difference]: Without dead ends: 15061 [2021-04-15 02:21:40,677 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 353.7ms TimeCoverageRelationStatistics Valid=471, Invalid=1089, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 02:21:40,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15061 states. [2021-04-15 02:21:40,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15061 to 13737. [2021-04-15 02:21:40,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13737 states, 13736 states have (on average 2.9764123471170647) internal successors, (40884), 13736 states have internal predecessors, (40884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:40,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13737 states to 13737 states and 40884 transitions. [2021-04-15 02:21:40,923 INFO L78 Accepts]: Start accepts. Automaton has 13737 states and 40884 transitions. Word has length 22 [2021-04-15 02:21:40,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:40,923 INFO L480 AbstractCegarLoop]: Abstraction has 13737 states and 40884 transitions. [2021-04-15 02:21:40,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:40,923 INFO L276 IsEmpty]: Start isEmpty. Operand 13737 states and 40884 transitions. [2021-04-15 02:21:40,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:40,937 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:40,937 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:41,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3303,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:41,138 INFO L428 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:41,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:41,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1952361601, now seen corresponding path program 295 times [2021-04-15 02:21:41,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:41,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505452834] [2021-04-15 02:21:41,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:41,249 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:41,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505452834] [2021-04-15 02:21:41,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053502967] [2021-04-15 02:21:41,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:41,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:41,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:41,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:41,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 18 [2021-04-15 02:21:41,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749949635] [2021-04-15 02:21:41,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:21:41,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:41,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:21:41,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:21:41,374 INFO L87 Difference]: Start difference. First operand 13737 states and 40884 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:41,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:41,843 INFO L93 Difference]: Finished difference Result 14989 states and 43964 transitions. [2021-04-15 02:21:41,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:21:41,844 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:41,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:41,874 INFO L225 Difference]: With dead ends: 14989 [2021-04-15 02:21:41,874 INFO L226 Difference]: Without dead ends: 14989 [2021-04-15 02:21:41,874 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 415.8ms TimeCoverageRelationStatistics Valid=523, Invalid=1199, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 02:21:41,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14989 states. [2021-04-15 02:21:42,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14989 to 13759. [2021-04-15 02:21:42,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13759 states, 13758 states have (on average 2.9763773804332025) internal successors, (40949), 13758 states have internal predecessors, (40949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:42,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13759 states to 13759 states and 40949 transitions. [2021-04-15 02:21:42,125 INFO L78 Accepts]: Start accepts. Automaton has 13759 states and 40949 transitions. Word has length 22 [2021-04-15 02:21:42,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:42,125 INFO L480 AbstractCegarLoop]: Abstraction has 13759 states and 40949 transitions. [2021-04-15 02:21:42,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:42,125 INFO L276 IsEmpty]: Start isEmpty. Operand 13759 states and 40949 transitions. [2021-04-15 02:21:42,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:42,140 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:42,140 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:42,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3304 [2021-04-15 02:21:42,341 INFO L428 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:42,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:42,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1446015335, now seen corresponding path program 296 times [2021-04-15 02:21:42,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:42,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491545590] [2021-04-15 02:21:42,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:42,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:42,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491545590] [2021-04-15 02:21:42,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608578580] [2021-04-15 02:21:42,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:42,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:21:42,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:42,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:42,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:42,532 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:42,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:42,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 18 [2021-04-15 02:21:42,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909601555] [2021-04-15 02:21:42,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:21:42,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:42,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:21:42,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:21:42,533 INFO L87 Difference]: Start difference. First operand 13759 states and 40949 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:42,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:42,942 INFO L93 Difference]: Finished difference Result 17231 states and 50882 transitions. [2021-04-15 02:21:42,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:21:42,943 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:42,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:42,978 INFO L225 Difference]: With dead ends: 17231 [2021-04-15 02:21:42,978 INFO L226 Difference]: Without dead ends: 17231 [2021-04-15 02:21:42,978 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 329.1ms TimeCoverageRelationStatistics Valid=518, Invalid=1204, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 02:21:42,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17231 states. [2021-04-15 02:21:43,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17231 to 16400. [2021-04-15 02:21:43,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16400 states, 16399 states have (on average 2.9804256357094947) internal successors, (48876), 16399 states have internal predecessors, (48876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:43,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16400 states to 16400 states and 48876 transitions. [2021-04-15 02:21:43,274 INFO L78 Accepts]: Start accepts. Automaton has 16400 states and 48876 transitions. Word has length 22 [2021-04-15 02:21:43,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:43,274 INFO L480 AbstractCegarLoop]: Abstraction has 16400 states and 48876 transitions. [2021-04-15 02:21:43,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:43,274 INFO L276 IsEmpty]: Start isEmpty. Operand 16400 states and 48876 transitions. [2021-04-15 02:21:43,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:43,291 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:43,291 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:43,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3305,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:43,491 INFO L428 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:43,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:43,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1365817023, now seen corresponding path program 297 times [2021-04-15 02:21:43,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:43,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868471681] [2021-04-15 02:21:43,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:43,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:43,608 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:43,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868471681] [2021-04-15 02:21:43,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589451930] [2021-04-15 02:21:43,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:43,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:21:43,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:43,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:43,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:43,723 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:43,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:43,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 19 [2021-04-15 02:21:43,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272546289] [2021-04-15 02:21:43,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 02:21:43,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:43,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 02:21:43,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:21:43,724 INFO L87 Difference]: Start difference. First operand 16400 states and 48876 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:44,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:44,128 INFO L93 Difference]: Finished difference Result 17044 states and 50389 transitions. [2021-04-15 02:21:44,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:21:44,128 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:44,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:44,163 INFO L225 Difference]: With dead ends: 17044 [2021-04-15 02:21:44,163 INFO L226 Difference]: Without dead ends: 17044 [2021-04-15 02:21:44,164 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 363.0ms TimeCoverageRelationStatistics Valid=459, Invalid=1101, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 02:21:44,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17044 states. [2021-04-15 02:21:44,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17044 to 16341. [2021-04-15 02:21:44,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16341 states, 16340 states have (on average 2.980232558139535) internal successors, (48697), 16340 states have internal predecessors, (48697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:44,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16341 states to 16341 states and 48697 transitions. [2021-04-15 02:21:44,456 INFO L78 Accepts]: Start accepts. Automaton has 16341 states and 48697 transitions. Word has length 22 [2021-04-15 02:21:44,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:44,456 INFO L480 AbstractCegarLoop]: Abstraction has 16341 states and 48697 transitions. [2021-04-15 02:21:44,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:44,456 INFO L276 IsEmpty]: Start isEmpty. Operand 16341 states and 48697 transitions. [2021-04-15 02:21:44,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:44,472 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:44,472 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:44,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3306,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:44,672 INFO L428 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:44,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:44,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1661693095, now seen corresponding path program 298 times [2021-04-15 02:21:44,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:44,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475695223] [2021-04-15 02:21:44,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:44,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:44,789 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:44,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475695223] [2021-04-15 02:21:44,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064162652] [2021-04-15 02:21:44,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:44,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:21:44,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:44,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:44,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:44,901 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:44,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:44,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 19 [2021-04-15 02:21:44,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846933676] [2021-04-15 02:21:44,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 02:21:44,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:44,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 02:21:44,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:21:44,902 INFO L87 Difference]: Start difference. First operand 16341 states and 48697 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:45,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:45,286 INFO L93 Difference]: Finished difference Result 18181 states and 53895 transitions. [2021-04-15 02:21:45,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:21:45,287 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:45,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:45,325 INFO L225 Difference]: With dead ends: 18181 [2021-04-15 02:21:45,326 INFO L226 Difference]: Without dead ends: 18181 [2021-04-15 02:21:45,326 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 354.2ms TimeCoverageRelationStatistics Valid=427, Invalid=1055, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 02:21:45,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18181 states. [2021-04-15 02:21:45,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18181 to 17672. [2021-04-15 02:21:45,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17672 states, 17671 states have (on average 2.982287363476883) internal successors, (52700), 17671 states have internal predecessors, (52700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:45,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17672 states to 17672 states and 52700 transitions. [2021-04-15 02:21:45,700 INFO L78 Accepts]: Start accepts. Automaton has 17672 states and 52700 transitions. Word has length 22 [2021-04-15 02:21:45,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:45,700 INFO L480 AbstractCegarLoop]: Abstraction has 17672 states and 52700 transitions. [2021-04-15 02:21:45,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:45,700 INFO L276 IsEmpty]: Start isEmpty. Operand 17672 states and 52700 transitions. [2021-04-15 02:21:45,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:45,721 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:45,722 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:45,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3307 [2021-04-15 02:21:45,922 INFO L428 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:45,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:45,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1025226241, now seen corresponding path program 299 times [2021-04-15 02:21:45,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:45,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297650090] [2021-04-15 02:21:45,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:45,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:46,044 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:46,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297650090] [2021-04-15 02:21:46,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060140596] [2021-04-15 02:21:46,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:46,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:21:46,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:46,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:46,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:46,161 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:46,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:46,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2021-04-15 02:21:46,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991454072] [2021-04-15 02:21:46,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 02:21:46,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:46,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 02:21:46,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:21:46,162 INFO L87 Difference]: Start difference. First operand 17672 states and 52700 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:46,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:46,516 INFO L93 Difference]: Finished difference Result 18327 states and 54324 transitions. [2021-04-15 02:21:46,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:21:46,517 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:46,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:46,538 INFO L225 Difference]: With dead ends: 18327 [2021-04-15 02:21:46,539 INFO L226 Difference]: Without dead ends: 18327 [2021-04-15 02:21:46,539 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 353.0ms TimeCoverageRelationStatistics Valid=469, Invalid=1171, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 02:21:46,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18327 states. [2021-04-15 02:21:46,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18327 to 17682. [2021-04-15 02:21:46,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17682 states, 17681 states have (on average 2.982240823482835) internal successors, (52729), 17681 states have internal predecessors, (52729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:46,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17682 states to 17682 states and 52729 transitions. [2021-04-15 02:21:46,819 INFO L78 Accepts]: Start accepts. Automaton has 17682 states and 52729 transitions. Word has length 22 [2021-04-15 02:21:46,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:46,819 INFO L480 AbstractCegarLoop]: Abstraction has 17682 states and 52729 transitions. [2021-04-15 02:21:46,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:46,820 INFO L276 IsEmpty]: Start isEmpty. Operand 17682 states and 52729 transitions. [2021-04-15 02:21:46,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:46,840 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:46,840 INFO L551 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:47,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3308,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:47,040 INFO L428 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:47,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:47,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1525377049, now seen corresponding path program 300 times [2021-04-15 02:21:47,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:47,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196274859] [2021-04-15 02:21:47,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:47,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:47,198 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:47,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196274859] [2021-04-15 02:21:47,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679821415] [2021-04-15 02:21:47,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:47,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:21:47,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:47,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:47,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:47,338 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:47,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:47,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-04-15 02:21:47,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519057878] [2021-04-15 02:21:47,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:21:47,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:47,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:21:47,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:21:47,339 INFO L87 Difference]: Start difference. First operand 17682 states and 52729 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:47,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:47,968 INFO L93 Difference]: Finished difference Result 19601 states and 58121 transitions. [2021-04-15 02:21:47,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-04-15 02:21:47,969 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:21:47,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:48,008 INFO L225 Difference]: With dead ends: 19601 [2021-04-15 02:21:48,008 INFO L226 Difference]: Without dead ends: 19601 [2021-04-15 02:21:48,009 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 577.3ms TimeCoverageRelationStatistics Valid=858, Invalid=2004, Unknown=0, NotChecked=0, Total=2862 [2021-04-15 02:21:48,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19601 states. [2021-04-15 02:21:48,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19601 to 17866. [2021-04-15 02:21:48,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17866 states, 17865 states have (on average 2.9824797089280715) internal successors, (53282), 17865 states have internal predecessors, (53282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:48,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17866 states to 17866 states and 53282 transitions. [2021-04-15 02:21:48,444 INFO L78 Accepts]: Start accepts. Automaton has 17866 states and 53282 transitions. Word has length 22 [2021-04-15 02:21:48,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:48,445 INFO L480 AbstractCegarLoop]: Abstraction has 17866 states and 53282 transitions. [2021-04-15 02:21:48,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:48,445 INFO L276 IsEmpty]: Start isEmpty. Operand 17866 states and 53282 transitions. [2021-04-15 02:21:48,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:21:48,465 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:48,465 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:48,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3309 [2021-04-15 02:21:48,666 INFO L428 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:48,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:48,666 INFO L82 PathProgramCache]: Analyzing trace with hash -120035998, now seen corresponding path program 301 times [2021-04-15 02:21:48,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:48,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269450161] [2021-04-15 02:21:48,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:48,737 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:48,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269450161] [2021-04-15 02:21:48,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592479440] [2021-04-15 02:21:48,737 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:48,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:48,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:48,810 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:48,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:48,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-04-15 02:21:48,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588475740] [2021-04-15 02:21:48,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:21:48,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:48,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:21:48,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:21:48,811 INFO L87 Difference]: Start difference. First operand 17866 states and 53282 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:49,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:49,076 INFO L93 Difference]: Finished difference Result 18113 states and 53632 transitions. [2021-04-15 02:21:49,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:21:49,077 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:21:49,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:49,112 INFO L225 Difference]: With dead ends: 18113 [2021-04-15 02:21:49,112 INFO L226 Difference]: Without dead ends: 18109 [2021-04-15 02:21:49,112 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 147.6ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:21:49,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18109 states. [2021-04-15 02:21:49,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18109 to 17844. [2021-04-15 02:21:49,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17844 states, 17843 states have (on average 2.981393263464664) internal successors, (53197), 17843 states have internal predecessors, (53197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:49,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17844 states to 17844 states and 53197 transitions. [2021-04-15 02:21:49,450 INFO L78 Accepts]: Start accepts. Automaton has 17844 states and 53197 transitions. Word has length 23 [2021-04-15 02:21:49,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:49,450 INFO L480 AbstractCegarLoop]: Abstraction has 17844 states and 53197 transitions. [2021-04-15 02:21:49,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:49,450 INFO L276 IsEmpty]: Start isEmpty. Operand 17844 states and 53197 transitions. [2021-04-15 02:21:49,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:21:49,470 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:49,470 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:49,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3310,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:49,671 INFO L428 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:49,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:49,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1369368998, now seen corresponding path program 302 times [2021-04-15 02:21:49,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:49,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353208540] [2021-04-15 02:21:49,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:49,747 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:49,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353208540] [2021-04-15 02:21:49,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490945186] [2021-04-15 02:21:49,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:49,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:21:49,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:49,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:49,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:21:49,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:49,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-04-15 02:21:49,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75730047] [2021-04-15 02:21:49,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:21:49,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:49,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:21:49,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:21:49,823 INFO L87 Difference]: Start difference. First operand 17844 states and 53197 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:50,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:50,117 INFO L93 Difference]: Finished difference Result 18088 states and 53547 transitions. [2021-04-15 02:21:50,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:21:50,118 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:21:50,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:50,147 INFO L225 Difference]: With dead ends: 18088 [2021-04-15 02:21:50,147 INFO L226 Difference]: Without dead ends: 18082 [2021-04-15 02:21:50,147 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 170.9ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:21:50,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18082 states. [2021-04-15 02:21:50,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18082 to 17833. [2021-04-15 02:21:50,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17833 states, 17832 states have (on average 2.980820995962315) internal successors, (53154), 17832 states have internal predecessors, (53154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:50,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17833 states to 17833 states and 53154 transitions. [2021-04-15 02:21:50,431 INFO L78 Accepts]: Start accepts. Automaton has 17833 states and 53154 transitions. Word has length 23 [2021-04-15 02:21:50,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:50,431 INFO L480 AbstractCegarLoop]: Abstraction has 17833 states and 53154 transitions. [2021-04-15 02:21:50,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:50,432 INFO L276 IsEmpty]: Start isEmpty. Operand 17833 states and 53154 transitions. [2021-04-15 02:21:50,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:21:50,448 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:50,448 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:50,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3311,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:50,648 INFO L428 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:50,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:50,648 INFO L82 PathProgramCache]: Analyzing trace with hash 296283618, now seen corresponding path program 303 times [2021-04-15 02:21:50,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:50,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268858748] [2021-04-15 02:21:50,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:50,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:50,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268858748] [2021-04-15 02:21:50,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108998464] [2021-04-15 02:21:50,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:50,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-04-15 02:21:50,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:50,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:21:50,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:50,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:50,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:21:50,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938329083] [2021-04-15 02:21:50,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:21:50,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:50,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:21:50,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:21:50,812 INFO L87 Difference]: Start difference. First operand 17833 states and 53154 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:51,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:51,188 INFO L93 Difference]: Finished difference Result 18081 states and 53510 transitions. [2021-04-15 02:21:51,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:21:51,189 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:21:51,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:51,222 INFO L225 Difference]: With dead ends: 18081 [2021-04-15 02:21:51,223 INFO L226 Difference]: Without dead ends: 18075 [2021-04-15 02:21:51,223 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 196.1ms TimeCoverageRelationStatistics Valid=292, Invalid=578, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:21:51,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18075 states. [2021-04-15 02:21:51,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18075 to 17833. [2021-04-15 02:21:51,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17833 states, 17832 states have (on average 2.9803723642889186) internal successors, (53146), 17832 states have internal predecessors, (53146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:51,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17833 states to 17833 states and 53146 transitions. [2021-04-15 02:21:51,538 INFO L78 Accepts]: Start accepts. Automaton has 17833 states and 53146 transitions. Word has length 23 [2021-04-15 02:21:51,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:51,538 INFO L480 AbstractCegarLoop]: Abstraction has 17833 states and 53146 transitions. [2021-04-15 02:21:51,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:51,538 INFO L276 IsEmpty]: Start isEmpty. Operand 17833 states and 53146 transitions. [2021-04-15 02:21:51,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:21:51,557 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:51,557 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:51,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3312 [2021-04-15 02:21:51,758 INFO L428 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:51,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:51,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1390375206, now seen corresponding path program 304 times [2021-04-15 02:21:51,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:51,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642531691] [2021-04-15 02:21:51,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:51,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:51,847 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:51,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642531691] [2021-04-15 02:21:51,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164463528] [2021-04-15 02:21:51,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:51,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:21:51,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:51,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:51,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:51,922 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:51,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:51,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-04-15 02:21:51,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830491631] [2021-04-15 02:21:51,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:21:51,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:51,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:21:51,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:21:51,923 INFO L87 Difference]: Start difference. First operand 17833 states and 53146 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:52,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:52,227 INFO L93 Difference]: Finished difference Result 18366 states and 54302 transitions. [2021-04-15 02:21:52,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:21:52,228 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:21:52,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:52,270 INFO L225 Difference]: With dead ends: 18366 [2021-04-15 02:21:52,270 INFO L226 Difference]: Without dead ends: 18358 [2021-04-15 02:21:52,270 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 191.9ms TimeCoverageRelationStatistics Valid=241, Invalid=515, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:21:52,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18358 states. [2021-04-15 02:21:52,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18358 to 17840. [2021-04-15 02:21:52,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17840 states, 17839 states have (on average 2.98009978137788) internal successors, (53162), 17839 states have internal predecessors, (53162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:52,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17840 states to 17840 states and 53162 transitions. [2021-04-15 02:21:52,607 INFO L78 Accepts]: Start accepts. Automaton has 17840 states and 53162 transitions. Word has length 23 [2021-04-15 02:21:52,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:52,607 INFO L480 AbstractCegarLoop]: Abstraction has 17840 states and 53162 transitions. [2021-04-15 02:21:52,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:52,607 INFO L276 IsEmpty]: Start isEmpty. Operand 17840 states and 53162 transitions. [2021-04-15 02:21:52,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:21:52,627 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:52,627 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:52,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3313,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:52,828 INFO L428 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:52,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:52,828 INFO L82 PathProgramCache]: Analyzing trace with hash 900986926, now seen corresponding path program 305 times [2021-04-15 02:21:52,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:52,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492937912] [2021-04-15 02:21:52,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:52,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:52,938 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:52,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492937912] [2021-04-15 02:21:52,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201358866] [2021-04-15 02:21:52,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:52,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:21:52,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:52,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:52,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:53,007 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:53,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:53,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-04-15 02:21:53,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342029860] [2021-04-15 02:21:53,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:21:53,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:53,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:21:53,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:21:53,008 INFO L87 Difference]: Start difference. First operand 17840 states and 53162 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:53,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:53,317 INFO L93 Difference]: Finished difference Result 18066 states and 53531 transitions. [2021-04-15 02:21:53,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:21:53,318 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:21:53,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:53,355 INFO L225 Difference]: With dead ends: 18066 [2021-04-15 02:21:53,355 INFO L226 Difference]: Without dead ends: 18058 [2021-04-15 02:21:53,356 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 208.6ms TimeCoverageRelationStatistics Valid=268, Invalid=544, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:21:53,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18058 states. [2021-04-15 02:21:53,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18058 to 17835. [2021-04-15 02:21:53,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17835 states, 17834 states have (on average 2.9798138387350006) internal successors, (53142), 17834 states have internal predecessors, (53142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:53,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17835 states to 17835 states and 53142 transitions. [2021-04-15 02:21:53,794 INFO L78 Accepts]: Start accepts. Automaton has 17835 states and 53142 transitions. Word has length 23 [2021-04-15 02:21:53,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:53,794 INFO L480 AbstractCegarLoop]: Abstraction has 17835 states and 53142 transitions. [2021-04-15 02:21:53,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:53,794 INFO L276 IsEmpty]: Start isEmpty. Operand 17835 states and 53142 transitions. [2021-04-15 02:21:53,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:21:53,810 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:53,810 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:54,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3314 [2021-04-15 02:21:54,010 INFO L428 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:54,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:54,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1037982158, now seen corresponding path program 306 times [2021-04-15 02:21:54,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:54,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25864409] [2021-04-15 02:21:54,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:54,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:54,071 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:54,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25864409] [2021-04-15 02:21:54,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079316376] [2021-04-15 02:21:54,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:54,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:21:54,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:54,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:21:54,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:54,147 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:21:54,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:54,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:21:54,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595914806] [2021-04-15 02:21:54,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:21:54,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:54,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:21:54,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:21:54,148 INFO L87 Difference]: Start difference. First operand 17835 states and 53142 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:54,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:54,282 INFO L93 Difference]: Finished difference Result 18191 states and 53712 transitions. [2021-04-15 02:21:54,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:21:54,283 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:21:54,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:54,305 INFO L225 Difference]: With dead ends: 18191 [2021-04-15 02:21:54,305 INFO L226 Difference]: Without dead ends: 18189 [2021-04-15 02:21:54,305 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:21:54,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18189 states. [2021-04-15 02:21:54,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18189 to 17847. [2021-04-15 02:21:54,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17847 states, 17846 states have (on average 2.979379132578729) internal successors, (53170), 17846 states have internal predecessors, (53170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:54,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17847 states to 17847 states and 53170 transitions. [2021-04-15 02:21:54,650 INFO L78 Accepts]: Start accepts. Automaton has 17847 states and 53170 transitions. Word has length 23 [2021-04-15 02:21:54,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:54,650 INFO L480 AbstractCegarLoop]: Abstraction has 17847 states and 53170 transitions. [2021-04-15 02:21:54,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:54,650 INFO L276 IsEmpty]: Start isEmpty. Operand 17847 states and 53170 transitions. [2021-04-15 02:21:54,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:21:54,667 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:54,668 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:54,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3315,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:54,868 INFO L428 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:54,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:54,868 INFO L82 PathProgramCache]: Analyzing trace with hash 707472532, now seen corresponding path program 307 times [2021-04-15 02:21:54,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:54,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005997778] [2021-04-15 02:21:54,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:54,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005997778] [2021-04-15 02:21:54,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463448893] [2021-04-15 02:21:54,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:54,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:54,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:21:55,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:55,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-04-15 02:21:55,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531938311] [2021-04-15 02:21:55,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:21:55,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:55,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:21:55,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:21:55,012 INFO L87 Difference]: Start difference. First operand 17847 states and 53170 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:55,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:55,216 INFO L93 Difference]: Finished difference Result 18272 states and 53872 transitions. [2021-04-15 02:21:55,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:21:55,217 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:21:55,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:55,255 INFO L225 Difference]: With dead ends: 18272 [2021-04-15 02:21:55,255 INFO L226 Difference]: Without dead ends: 18271 [2021-04-15 02:21:55,255 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:21:55,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18271 states. [2021-04-15 02:21:55,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18271 to 17840. [2021-04-15 02:21:55,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17840 states, 17839 states have (on average 2.9784180727619263) internal successors, (53132), 17839 states have internal predecessors, (53132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:55,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17840 states to 17840 states and 53132 transitions. [2021-04-15 02:21:55,601 INFO L78 Accepts]: Start accepts. Automaton has 17840 states and 53132 transitions. Word has length 23 [2021-04-15 02:21:55,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:55,601 INFO L480 AbstractCegarLoop]: Abstraction has 17840 states and 53132 transitions. [2021-04-15 02:21:55,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:55,601 INFO L276 IsEmpty]: Start isEmpty. Operand 17840 states and 53132 transitions. [2021-04-15 02:21:55,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:21:55,621 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:55,621 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:55,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3316 [2021-04-15 02:21:55,822 INFO L428 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:55,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:55,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1876881456, now seen corresponding path program 308 times [2021-04-15 02:21:55,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:55,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231676030] [2021-04-15 02:21:55,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:55,895 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:55,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231676030] [2021-04-15 02:21:55,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377327709] [2021-04-15 02:21:55,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:55,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:21:55,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:55,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:55,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:55,964 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:21:55,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:55,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-04-15 02:21:55,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414687977] [2021-04-15 02:21:55,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:21:55,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:55,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:21:55,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:21:55,965 INFO L87 Difference]: Start difference. First operand 17840 states and 53132 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:56,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:56,238 INFO L93 Difference]: Finished difference Result 18131 states and 53544 transitions. [2021-04-15 02:21:56,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:21:56,239 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:21:56,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:56,276 INFO L225 Difference]: With dead ends: 18131 [2021-04-15 02:21:56,276 INFO L226 Difference]: Without dead ends: 18126 [2021-04-15 02:21:56,276 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 150.2ms TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:21:56,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18126 states. [2021-04-15 02:21:56,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18126 to 17829. [2021-04-15 02:21:56,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17829 states, 17828 states have (on average 2.976946376486426) internal successors, (53073), 17828 states have internal predecessors, (53073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:56,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17829 states to 17829 states and 53073 transitions. [2021-04-15 02:21:56,615 INFO L78 Accepts]: Start accepts. Automaton has 17829 states and 53073 transitions. Word has length 23 [2021-04-15 02:21:56,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:56,615 INFO L480 AbstractCegarLoop]: Abstraction has 17829 states and 53073 transitions. [2021-04-15 02:21:56,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:56,615 INFO L276 IsEmpty]: Start isEmpty. Operand 17829 states and 53073 transitions. [2021-04-15 02:21:56,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:21:56,735 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:56,735 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:56,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3317,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:56,936 INFO L428 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:56,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:56,936 INFO L82 PathProgramCache]: Analyzing trace with hash -387476460, now seen corresponding path program 309 times [2021-04-15 02:21:56,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:56,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466258725] [2021-04-15 02:21:56,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:56,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:57,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466258725] [2021-04-15 02:21:57,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769418878] [2021-04-15 02:21:57,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:57,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:21:57,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:57,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:21:57,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:57,093 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:57,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:57,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:21:57,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408261269] [2021-04-15 02:21:57,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:21:57,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:57,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:21:57,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:21:57,094 INFO L87 Difference]: Start difference. First operand 17829 states and 53073 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:57,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:57,394 INFO L93 Difference]: Finished difference Result 18120 states and 53485 transitions. [2021-04-15 02:21:57,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:21:57,394 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:21:57,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:57,424 INFO L225 Difference]: With dead ends: 18120 [2021-04-15 02:21:57,424 INFO L226 Difference]: Without dead ends: 18110 [2021-04-15 02:21:57,424 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 168.8ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:21:57,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18110 states. [2021-04-15 02:21:57,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18110 to 17810. [2021-04-15 02:21:57,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17810 states, 17809 states have (on average 2.9759110562075355) internal successors, (52998), 17809 states have internal predecessors, (52998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:57,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17810 states to 17810 states and 52998 transitions. [2021-04-15 02:21:57,701 INFO L78 Accepts]: Start accepts. Automaton has 17810 states and 52998 transitions. Word has length 23 [2021-04-15 02:21:57,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:57,701 INFO L480 AbstractCegarLoop]: Abstraction has 17810 states and 52998 transitions. [2021-04-15 02:21:57,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:57,701 INFO L276 IsEmpty]: Start isEmpty. Operand 17810 states and 52998 transitions. [2021-04-15 02:21:57,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:21:57,715 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:57,715 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:57,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3318,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:57,916 INFO L428 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:57,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:57,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1460561840, now seen corresponding path program 310 times [2021-04-15 02:21:57,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:57,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283969120] [2021-04-15 02:21:57,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:57,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:57,989 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:57,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283969120] [2021-04-15 02:21:57,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003384292] [2021-04-15 02:21:57,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:58,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:21:58,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:58,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:58,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:58,049 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:21:58,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:58,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-04-15 02:21:58,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983887036] [2021-04-15 02:21:58,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:21:58,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:58,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:21:58,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:21:58,050 INFO L87 Difference]: Start difference. First operand 17810 states and 52998 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:58,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:58,293 INFO L93 Difference]: Finished difference Result 18994 states and 55842 transitions. [2021-04-15 02:21:58,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:21:58,294 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:21:58,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:58,332 INFO L225 Difference]: With dead ends: 18994 [2021-04-15 02:21:58,332 INFO L226 Difference]: Without dead ends: 18988 [2021-04-15 02:21:58,332 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 142.8ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:21:58,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18988 states. [2021-04-15 02:21:58,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18988 to 17829. [2021-04-15 02:21:58,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17829 states, 17828 states have (on average 2.9754319048687456) internal successors, (53046), 17828 states have internal predecessors, (53046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:58,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17829 states to 17829 states and 53046 transitions. [2021-04-15 02:21:58,647 INFO L78 Accepts]: Start accepts. Automaton has 17829 states and 53046 transitions. Word has length 23 [2021-04-15 02:21:58,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:58,647 INFO L480 AbstractCegarLoop]: Abstraction has 17829 states and 53046 transitions. [2021-04-15 02:21:58,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:58,647 INFO L276 IsEmpty]: Start isEmpty. Operand 17829 states and 53046 transitions. [2021-04-15 02:21:58,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:21:58,667 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:58,667 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:58,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3319 [2021-04-15 02:21:58,867 INFO L428 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:58,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:58,867 INFO L82 PathProgramCache]: Analyzing trace with hash -366470252, now seen corresponding path program 311 times [2021-04-15 02:21:58,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:58,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010006074] [2021-04-15 02:21:58,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:58,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:58,961 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:58,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010006074] [2021-04-15 02:21:58,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821141347] [2021-04-15 02:21:58,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:58,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:21:58,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:58,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:21:58,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:59,032 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:59,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:59,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:21:59,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569624618] [2021-04-15 02:21:59,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:21:59,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:59,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:21:59,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:21:59,033 INFO L87 Difference]: Start difference. First operand 17829 states and 53046 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:59,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:59,308 INFO L93 Difference]: Finished difference Result 19008 states and 55851 transitions. [2021-04-15 02:21:59,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:21:59,309 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:21:59,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:59,347 INFO L225 Difference]: With dead ends: 19008 [2021-04-15 02:21:59,348 INFO L226 Difference]: Without dead ends: 19000 [2021-04-15 02:21:59,348 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 177.1ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:21:59,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19000 states. [2021-04-15 02:21:59,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19000 to 17854. [2021-04-15 02:21:59,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17854 states, 17853 states have (on average 2.975354282193469) internal successors, (53119), 17853 states have internal predecessors, (53119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:59,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17854 states to 17854 states and 53119 transitions. [2021-04-15 02:21:59,662 INFO L78 Accepts]: Start accepts. Automaton has 17854 states and 53119 transitions. Word has length 23 [2021-04-15 02:21:59,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:59,662 INFO L480 AbstractCegarLoop]: Abstraction has 17854 states and 53119 transitions. [2021-04-15 02:21:59,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:59,662 INFO L276 IsEmpty]: Start isEmpty. Operand 17854 states and 53119 transitions. [2021-04-15 02:21:59,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:21:59,681 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:59,681 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:59,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3320 [2021-04-15 02:21:59,882 INFO L428 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:59,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:59,882 INFO L82 PathProgramCache]: Analyzing trace with hash -809369392, now seen corresponding path program 312 times [2021-04-15 02:21:59,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:59,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617725211] [2021-04-15 02:21:59,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:00,075 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:00,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617725211] [2021-04-15 02:22:00,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601376842] [2021-04-15 02:22:00,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:00,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:22:00,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:00,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:22:00,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:00,146 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:00,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:00,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:22:00,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491106179] [2021-04-15 02:22:00,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:00,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:00,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:00,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:00,147 INFO L87 Difference]: Start difference. First operand 17854 states and 53119 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:00,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:00,436 INFO L93 Difference]: Finished difference Result 18500 states and 54560 transitions. [2021-04-15 02:22:00,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:22:00,437 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:00,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:00,474 INFO L225 Difference]: With dead ends: 18500 [2021-04-15 02:22:00,474 INFO L226 Difference]: Without dead ends: 18490 [2021-04-15 02:22:00,474 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 299.4ms TimeCoverageRelationStatistics Valid=257, Invalid=555, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:22:00,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18490 states. [2021-04-15 02:22:00,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18490 to 17854. [2021-04-15 02:22:00,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17854 states, 17853 states have (on average 2.9751302302134097) internal successors, (53115), 17853 states have internal predecessors, (53115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:00,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17854 states to 17854 states and 53115 transitions. [2021-04-15 02:22:00,784 INFO L78 Accepts]: Start accepts. Automaton has 17854 states and 53115 transitions. Word has length 23 [2021-04-15 02:22:00,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:00,784 INFO L480 AbstractCegarLoop]: Abstraction has 17854 states and 53115 transitions. [2021-04-15 02:22:00,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:00,784 INFO L276 IsEmpty]: Start isEmpty. Operand 17854 states and 53115 transitions. [2021-04-15 02:22:00,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:00,804 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:00,804 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:01,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3321,314 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:01,004 INFO L428 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:01,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:01,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1196093342, now seen corresponding path program 313 times [2021-04-15 02:22:01,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:01,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783773062] [2021-04-15 02:22:01,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:01,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:01,079 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:01,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783773062] [2021-04-15 02:22:01,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38163320] [2021-04-15 02:22:01,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:01,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:01,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:01,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:22:01,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:01,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-04-15 02:22:01,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436081770] [2021-04-15 02:22:01,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:22:01,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:01,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:22:01,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:01,141 INFO L87 Difference]: Start difference. First operand 17854 states and 53115 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:01,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:01,367 INFO L93 Difference]: Finished difference Result 18151 states and 53567 transitions. [2021-04-15 02:22:01,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:22:01,367 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:01,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:01,390 INFO L225 Difference]: With dead ends: 18151 [2021-04-15 02:22:01,390 INFO L226 Difference]: Without dead ends: 18139 [2021-04-15 02:22:01,390 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 141.6ms TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:22:01,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18139 states. [2021-04-15 02:22:01,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18139 to 17811. [2021-04-15 02:22:01,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17811 states, 17810 states have (on average 2.9742841100505335) internal successors, (52972), 17810 states have internal predecessors, (52972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:01,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17811 states to 17811 states and 52972 transitions. [2021-04-15 02:22:01,635 INFO L78 Accepts]: Start accepts. Automaton has 17811 states and 52972 transitions. Word has length 23 [2021-04-15 02:22:01,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:01,635 INFO L480 AbstractCegarLoop]: Abstraction has 17811 states and 52972 transitions. [2021-04-15 02:22:01,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:01,636 INFO L276 IsEmpty]: Start isEmpty. Operand 17811 states and 52972 transitions. [2021-04-15 02:22:01,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:01,648 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:01,649 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:01,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3322,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:01,849 INFO L428 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:01,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:01,849 INFO L82 PathProgramCache]: Analyzing trace with hash -102001754, now seen corresponding path program 314 times [2021-04-15 02:22:01,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:01,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919381011] [2021-04-15 02:22:01,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:01,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:01,944 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:01,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919381011] [2021-04-15 02:22:01,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875488178] [2021-04-15 02:22:01,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:01,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:01,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:01,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:01,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:02,012 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:02,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:02,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-04-15 02:22:02,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134643405] [2021-04-15 02:22:02,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:02,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:02,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:02,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:02,013 INFO L87 Difference]: Start difference. First operand 17811 states and 52972 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:02,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:02,320 INFO L93 Difference]: Finished difference Result 18119 states and 53440 transitions. [2021-04-15 02:22:02,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:22:02,321 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:02,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:02,357 INFO L225 Difference]: With dead ends: 18119 [2021-04-15 02:22:02,358 INFO L226 Difference]: Without dead ends: 18107 [2021-04-15 02:22:02,358 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 186.0ms TimeCoverageRelationStatistics Valid=248, Invalid=508, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:22:02,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18107 states. [2021-04-15 02:22:02,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18107 to 17779. [2021-04-15 02:22:02,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17779 states, 17778 states have (on average 2.9742940713241084) internal successors, (52877), 17778 states have internal predecessors, (52877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:02,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17779 states to 17779 states and 52877 transitions. [2021-04-15 02:22:02,682 INFO L78 Accepts]: Start accepts. Automaton has 17779 states and 52877 transitions. Word has length 23 [2021-04-15 02:22:02,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:02,682 INFO L480 AbstractCegarLoop]: Abstraction has 17779 states and 52877 transitions. [2021-04-15 02:22:02,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:02,682 INFO L276 IsEmpty]: Start isEmpty. Operand 17779 states and 52877 transitions. [2021-04-15 02:22:02,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:02,702 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:02,702 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:02,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3323,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:02,902 INFO L428 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:02,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:02,902 INFO L82 PathProgramCache]: Analyzing trace with hash -544900894, now seen corresponding path program 315 times [2021-04-15 02:22:02,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:02,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107160603] [2021-04-15 02:22:02,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:02,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:03,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107160603] [2021-04-15 02:22:03,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038550242] [2021-04-15 02:22:03,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:03,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:22:03,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:03,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:22:03,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:03,168 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:03,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:03,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:22:03,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085636031] [2021-04-15 02:22:03,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:03,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:03,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:03,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:03,169 INFO L87 Difference]: Start difference. First operand 17779 states and 52877 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:03,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:03,484 INFO L93 Difference]: Finished difference Result 18547 states and 54582 transitions. [2021-04-15 02:22:03,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:22:03,484 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:03,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:03,524 INFO L225 Difference]: With dead ends: 18547 [2021-04-15 02:22:03,524 INFO L226 Difference]: Without dead ends: 18532 [2021-04-15 02:22:03,524 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 215.6ms TimeCoverageRelationStatistics Valid=282, Invalid=588, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:22:03,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18532 states. [2021-04-15 02:22:03,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18532 to 17766. [2021-04-15 02:22:03,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17766 states, 17765 states have (on average 2.974838164931044) internal successors, (52848), 17765 states have internal predecessors, (52848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:03,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17766 states to 17766 states and 52848 transitions. [2021-04-15 02:22:03,833 INFO L78 Accepts]: Start accepts. Automaton has 17766 states and 52848 transitions. Word has length 23 [2021-04-15 02:22:03,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:03,833 INFO L480 AbstractCegarLoop]: Abstraction has 17766 states and 52848 transitions. [2021-04-15 02:22:03,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:03,833 INFO L276 IsEmpty]: Start isEmpty. Operand 17766 states and 52848 transitions. [2021-04-15 02:22:03,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:03,852 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:03,852 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:04,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3324,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:04,052 INFO L428 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:04,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:04,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1199463112, now seen corresponding path program 316 times [2021-04-15 02:22:04,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:04,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492599855] [2021-04-15 02:22:04,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:04,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:04,151 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:04,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492599855] [2021-04-15 02:22:04,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39667574] [2021-04-15 02:22:04,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:04,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:22:04,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:04,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:04,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:04,228 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:04,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:04,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-04-15 02:22:04,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969488859] [2021-04-15 02:22:04,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:22:04,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:04,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:22:04,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:22:04,229 INFO L87 Difference]: Start difference. First operand 17766 states and 52848 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:04,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:04,565 INFO L93 Difference]: Finished difference Result 18019 states and 53257 transitions. [2021-04-15 02:22:04,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:22:04,566 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:04,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:04,598 INFO L225 Difference]: With dead ends: 18019 [2021-04-15 02:22:04,598 INFO L226 Difference]: Without dead ends: 18009 [2021-04-15 02:22:04,598 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 218.1ms TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:22:04,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18009 states. [2021-04-15 02:22:04,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18009 to 17756. [2021-04-15 02:22:04,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17756 states, 17755 states have (on average 2.9744297381019433) internal successors, (52811), 17755 states have internal predecessors, (52811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:04,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17756 states to 17756 states and 52811 transitions. [2021-04-15 02:22:04,876 INFO L78 Accepts]: Start accepts. Automaton has 17756 states and 52811 transitions. Word has length 23 [2021-04-15 02:22:04,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:04,876 INFO L480 AbstractCegarLoop]: Abstraction has 17756 states and 52811 transitions. [2021-04-15 02:22:04,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:04,876 INFO L276 IsEmpty]: Start isEmpty. Operand 17756 states and 52811 transitions. [2021-04-15 02:22:04,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:04,890 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:04,890 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:05,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3325,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:05,090 INFO L428 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:05,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:05,091 INFO L82 PathProgramCache]: Analyzing trace with hash 334383492, now seen corresponding path program 317 times [2021-04-15 02:22:05,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:05,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51668882] [2021-04-15 02:22:05,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:05,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:05,147 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:05,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51668882] [2021-04-15 02:22:05,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920971286] [2021-04-15 02:22:05,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:05,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:22:05,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:05,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:05,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:05,219 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:22:05,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:05,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-04-15 02:22:05,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747391937] [2021-04-15 02:22:05,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:22:05,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:05,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:22:05,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:05,219 INFO L87 Difference]: Start difference. First operand 17756 states and 52811 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:05,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:05,344 INFO L93 Difference]: Finished difference Result 18147 states and 53443 transitions. [2021-04-15 02:22:05,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:22:05,345 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:05,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:05,383 INFO L225 Difference]: With dead ends: 18147 [2021-04-15 02:22:05,383 INFO L226 Difference]: Without dead ends: 18147 [2021-04-15 02:22:05,383 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:22:05,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18147 states. [2021-04-15 02:22:05,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18147 to 17763. [2021-04-15 02:22:05,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17763 states, 17762 states have (on average 2.9734827159103703) internal successors, (52815), 17762 states have internal predecessors, (52815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:05,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17763 states to 17763 states and 52815 transitions. [2021-04-15 02:22:05,718 INFO L78 Accepts]: Start accepts. Automaton has 17763 states and 52815 transitions. Word has length 23 [2021-04-15 02:22:05,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:05,718 INFO L480 AbstractCegarLoop]: Abstraction has 17763 states and 52815 transitions. [2021-04-15 02:22:05,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:05,718 INFO L276 IsEmpty]: Start isEmpty. Operand 17763 states and 52815 transitions. [2021-04-15 02:22:05,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:05,738 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:05,738 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:05,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3326 [2021-04-15 02:22:05,938 INFO L428 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:05,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:05,938 INFO L82 PathProgramCache]: Analyzing trace with hash -504515806, now seen corresponding path program 318 times [2021-04-15 02:22:05,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:05,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31814326] [2021-04-15 02:22:05,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:06,010 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:06,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31814326] [2021-04-15 02:22:06,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821109866] [2021-04-15 02:22:06,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:06,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:22:06,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:06,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:22:06,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:06,083 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:06,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:06,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:22:06,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963165190] [2021-04-15 02:22:06,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:22:06,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:06,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:22:06,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:06,083 INFO L87 Difference]: Start difference. First operand 17763 states and 52815 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:06,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:06,395 INFO L93 Difference]: Finished difference Result 18064 states and 53237 transitions. [2021-04-15 02:22:06,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:22:06,396 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:06,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:06,434 INFO L225 Difference]: With dead ends: 18064 [2021-04-15 02:22:06,435 INFO L226 Difference]: Without dead ends: 18059 [2021-04-15 02:22:06,435 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 196.1ms TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:22:06,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18059 states. [2021-04-15 02:22:06,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18059 to 17747. [2021-04-15 02:22:06,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17747 states, 17746 states have (on average 2.971599233630114) internal successors, (52734), 17746 states have internal predecessors, (52734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:06,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17747 states to 17747 states and 52734 transitions. [2021-04-15 02:22:06,838 INFO L78 Accepts]: Start accepts. Automaton has 17747 states and 52734 transitions. Word has length 23 [2021-04-15 02:22:06,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:06,838 INFO L480 AbstractCegarLoop]: Abstraction has 17747 states and 52734 transitions. [2021-04-15 02:22:06,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:06,838 INFO L276 IsEmpty]: Start isEmpty. Operand 17747 states and 52734 transitions. [2021-04-15 02:22:06,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:06,860 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:06,860 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:07,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3327,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:07,061 INFO L428 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:07,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:07,061 INFO L82 PathProgramCache]: Analyzing trace with hash 984889190, now seen corresponding path program 319 times [2021-04-15 02:22:07,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:07,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541088281] [2021-04-15 02:22:07,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:07,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:07,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541088281] [2021-04-15 02:22:07,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502522277] [2021-04-15 02:22:07,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:07,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:07,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:07,230 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:22:07,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:07,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-04-15 02:22:07,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123370900] [2021-04-15 02:22:07,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:22:07,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:07,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:22:07,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:07,231 INFO L87 Difference]: Start difference. First operand 17747 states and 52734 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:07,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:07,543 INFO L93 Difference]: Finished difference Result 18047 states and 53156 transitions. [2021-04-15 02:22:07,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:22:07,544 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:07,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:07,580 INFO L225 Difference]: With dead ends: 18047 [2021-04-15 02:22:07,580 INFO L226 Difference]: Without dead ends: 18039 [2021-04-15 02:22:07,580 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 180.1ms TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:22:07,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18039 states. [2021-04-15 02:22:07,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18039 to 17721. [2021-04-15 02:22:07,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17721 states, 17720 states have (on average 2.970316027088036) internal successors, (52634), 17720 states have internal predecessors, (52634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:07,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17721 states to 17721 states and 52634 transitions. [2021-04-15 02:22:07,909 INFO L78 Accepts]: Start accepts. Automaton has 17721 states and 52634 transitions. Word has length 23 [2021-04-15 02:22:07,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:07,909 INFO L480 AbstractCegarLoop]: Abstraction has 17721 states and 52634 transitions. [2021-04-15 02:22:07,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:07,909 INFO L276 IsEmpty]: Start isEmpty. Operand 17721 states and 52634 transitions. [2021-04-15 02:22:07,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:07,928 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:07,928 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:08,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3328,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:08,129 INFO L428 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:08,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:08,129 INFO L82 PathProgramCache]: Analyzing trace with hash -88196190, now seen corresponding path program 320 times [2021-04-15 02:22:08,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:08,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187302959] [2021-04-15 02:22:08,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:08,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187302959] [2021-04-15 02:22:08,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675107685] [2021-04-15 02:22:08,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:08,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:08,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:08,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:08,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:08,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:08,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-04-15 02:22:08,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309317829] [2021-04-15 02:22:08,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:08,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:08,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:08,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:08,294 INFO L87 Difference]: Start difference. First operand 17721 states and 52634 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:08,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:08,540 INFO L93 Difference]: Finished difference Result 18021 states and 53057 transitions. [2021-04-15 02:22:08,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:22:08,541 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:08,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:08,562 INFO L225 Difference]: With dead ends: 18021 [2021-04-15 02:22:08,562 INFO L226 Difference]: Without dead ends: 18012 [2021-04-15 02:22:08,562 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 167.2ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:22:08,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18012 states. [2021-04-15 02:22:08,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18012 to 17705. [2021-04-15 02:22:08,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17705 states, 17704 states have (on average 2.9697808404880255) internal successors, (52577), 17704 states have internal predecessors, (52577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:08,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17705 states to 17705 states and 52577 transitions. [2021-04-15 02:22:08,816 INFO L78 Accepts]: Start accepts. Automaton has 17705 states and 52577 transitions. Word has length 23 [2021-04-15 02:22:08,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:08,816 INFO L480 AbstractCegarLoop]: Abstraction has 17705 states and 52577 transitions. [2021-04-15 02:22:08,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:08,816 INFO L276 IsEmpty]: Start isEmpty. Operand 17705 states and 52577 transitions. [2021-04-15 02:22:08,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:08,831 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:08,831 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:09,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3329 [2021-04-15 02:22:09,031 INFO L428 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:09,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:09,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1005895398, now seen corresponding path program 321 times [2021-04-15 02:22:09,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:09,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509509057] [2021-04-15 02:22:09,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:09,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:09,110 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:09,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509509057] [2021-04-15 02:22:09,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950838674] [2021-04-15 02:22:09,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:09,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:22:09,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:09,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:22:09,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:09,190 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:09,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:09,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:22:09,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680130086] [2021-04-15 02:22:09,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:09,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:09,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:09,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:09,191 INFO L87 Difference]: Start difference. First operand 17705 states and 52577 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:09,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:09,480 INFO L93 Difference]: Finished difference Result 19443 states and 56893 transitions. [2021-04-15 02:22:09,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:22:09,481 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:09,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:09,520 INFO L225 Difference]: With dead ends: 19443 [2021-04-15 02:22:09,520 INFO L226 Difference]: Without dead ends: 19435 [2021-04-15 02:22:09,520 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 184.0ms TimeCoverageRelationStatistics Valid=243, Invalid=513, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:22:09,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19435 states. [2021-04-15 02:22:09,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19435 to 17759. [2021-04-15 02:22:09,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17759 states, 17758 states have (on average 2.968802793107332) internal successors, (52720), 17758 states have internal predecessors, (52720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:09,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17759 states to 17759 states and 52720 transitions. [2021-04-15 02:22:09,967 INFO L78 Accepts]: Start accepts. Automaton has 17759 states and 52720 transitions. Word has length 23 [2021-04-15 02:22:09,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:09,967 INFO L480 AbstractCegarLoop]: Abstraction has 17759 states and 52720 transitions. [2021-04-15 02:22:09,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:09,968 INFO L276 IsEmpty]: Start isEmpty. Operand 17759 states and 52720 transitions. [2021-04-15 02:22:09,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:09,985 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:09,985 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:10,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 323 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3330 [2021-04-15 02:22:10,186 INFO L428 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:10,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:10,186 INFO L82 PathProgramCache]: Analyzing trace with hash 562996258, now seen corresponding path program 322 times [2021-04-15 02:22:10,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:10,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133494802] [2021-04-15 02:22:10,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:10,307 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:10,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133494802] [2021-04-15 02:22:10,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618936959] [2021-04-15 02:22:10,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:10,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:22:10,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:10,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:10,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:10,384 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:10,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:10,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-04-15 02:22:10,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028001703] [2021-04-15 02:22:10,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:22:10,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:10,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:22:10,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:22:10,385 INFO L87 Difference]: Start difference. First operand 17759 states and 52720 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:10,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:10,705 INFO L93 Difference]: Finished difference Result 19462 states and 56909 transitions. [2021-04-15 02:22:10,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:22:10,705 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:10,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:10,744 INFO L225 Difference]: With dead ends: 19462 [2021-04-15 02:22:10,744 INFO L226 Difference]: Without dead ends: 19452 [2021-04-15 02:22:10,745 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 230.7ms TimeCoverageRelationStatistics Valid=278, Invalid=592, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:22:10,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19452 states. [2021-04-15 02:22:11,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19452 to 17815. [2021-04-15 02:22:11,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17815 states, 17814 states have (on average 2.967778152015269) internal successors, (52868), 17814 states have internal predecessors, (52868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:11,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17815 states to 17815 states and 52868 transitions. [2021-04-15 02:22:11,073 INFO L78 Accepts]: Start accepts. Automaton has 17815 states and 52868 transitions. Word has length 23 [2021-04-15 02:22:11,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:11,073 INFO L480 AbstractCegarLoop]: Abstraction has 17815 states and 52868 transitions. [2021-04-15 02:22:11,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:11,074 INFO L276 IsEmpty]: Start isEmpty. Operand 17815 states and 52868 transitions. [2021-04-15 02:22:11,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:11,093 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:11,093 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:11,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3331 [2021-04-15 02:22:11,294 INFO L428 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:11,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:11,294 INFO L82 PathProgramCache]: Analyzing trace with hash -281975194, now seen corresponding path program 323 times [2021-04-15 02:22:11,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:11,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042187823] [2021-04-15 02:22:11,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:11,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:11,407 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:11,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042187823] [2021-04-15 02:22:11,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136832307] [2021-04-15 02:22:11,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:11,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:22:11,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:11,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:11,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:11,486 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:11,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:11,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-04-15 02:22:11,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424470645] [2021-04-15 02:22:11,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:22:11,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:11,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:22:11,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:22:11,487 INFO L87 Difference]: Start difference. First operand 17815 states and 52868 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:11,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:11,849 INFO L93 Difference]: Finished difference Result 18858 states and 55259 transitions. [2021-04-15 02:22:11,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:22:11,850 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:11,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:11,886 INFO L225 Difference]: With dead ends: 18858 [2021-04-15 02:22:11,887 INFO L226 Difference]: Without dead ends: 18846 [2021-04-15 02:22:11,887 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 262.8ms TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:22:11,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18846 states. [2021-04-15 02:22:12,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18846 to 17815. [2021-04-15 02:22:12,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17815 states, 17814 states have (on average 2.967497473896935) internal successors, (52863), 17814 states have internal predecessors, (52863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:12,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17815 states to 17815 states and 52863 transitions. [2021-04-15 02:22:12,203 INFO L78 Accepts]: Start accepts. Automaton has 17815 states and 52863 transitions. Word has length 23 [2021-04-15 02:22:12,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:12,203 INFO L480 AbstractCegarLoop]: Abstraction has 17815 states and 52863 transitions. [2021-04-15 02:22:12,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:12,203 INFO L276 IsEmpty]: Start isEmpty. Operand 17815 states and 52863 transitions. [2021-04-15 02:22:12,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:12,222 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:12,223 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:12,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3332,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:12,423 INFO L428 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:12,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:12,423 INFO L82 PathProgramCache]: Analyzing trace with hash 614484244, now seen corresponding path program 324 times [2021-04-15 02:22:12,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:12,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561493958] [2021-04-15 02:22:12,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:12,521 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:12,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561493958] [2021-04-15 02:22:12,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720397674] [2021-04-15 02:22:12,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:12,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:22:12,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:12,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:22:12,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:12,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:12,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:22:12,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356989043] [2021-04-15 02:22:12,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:12,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:12,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:12,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:12,597 INFO L87 Difference]: Start difference. First operand 17815 states and 52863 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:12,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:12,882 INFO L93 Difference]: Finished difference Result 18134 states and 53387 transitions. [2021-04-15 02:22:12,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:22:12,883 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:12,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:12,917 INFO L225 Difference]: With dead ends: 18134 [2021-04-15 02:22:12,917 INFO L226 Difference]: Without dead ends: 18122 [2021-04-15 02:22:12,917 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 184.0ms TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:22:12,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18122 states. [2021-04-15 02:22:13,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18122 to 17754. [2021-04-15 02:22:13,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17754 states, 17753 states have (on average 2.9667661803638823) internal successors, (52669), 17753 states have internal predecessors, (52669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:13,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17754 states to 17754 states and 52669 transitions. [2021-04-15 02:22:13,245 INFO L78 Accepts]: Start accepts. Automaton has 17754 states and 52669 transitions. Word has length 23 [2021-04-15 02:22:13,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:13,245 INFO L480 AbstractCegarLoop]: Abstraction has 17754 states and 52669 transitions. [2021-04-15 02:22:13,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:13,245 INFO L276 IsEmpty]: Start isEmpty. Operand 17754 states and 52669 transitions. [2021-04-15 02:22:13,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:13,264 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:13,264 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:13,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3333,326 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:13,465 INFO L428 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:13,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:13,465 INFO L82 PathProgramCache]: Analyzing trace with hash 171585104, now seen corresponding path program 325 times [2021-04-15 02:22:13,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:13,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562037453] [2021-04-15 02:22:13,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:13,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:13,572 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:13,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562037453] [2021-04-15 02:22:13,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870792796] [2021-04-15 02:22:13,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:13,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:13,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:13,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:13,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:13,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-04-15 02:22:13,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812407793] [2021-04-15 02:22:13,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:22:13,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:13,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:22:13,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:22:13,641 INFO L87 Difference]: Start difference. First operand 17754 states and 52669 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:13,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:13,909 INFO L93 Difference]: Finished difference Result 18086 states and 53214 transitions. [2021-04-15 02:22:13,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:22:13,910 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:13,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:13,933 INFO L225 Difference]: With dead ends: 18086 [2021-04-15 02:22:13,933 INFO L226 Difference]: Without dead ends: 18076 [2021-04-15 02:22:13,933 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 192.3ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:22:13,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18076 states. [2021-04-15 02:22:14,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18076 to 17750. [2021-04-15 02:22:14,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17750 states, 17749 states have (on average 2.966476984618852) internal successors, (52652), 17749 states have internal predecessors, (52652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:14,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17750 states to 17750 states and 52652 transitions. [2021-04-15 02:22:14,235 INFO L78 Accepts]: Start accepts. Automaton has 17750 states and 52652 transitions. Word has length 23 [2021-04-15 02:22:14,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:14,235 INFO L480 AbstractCegarLoop]: Abstraction has 17750 states and 52652 transitions. [2021-04-15 02:22:14,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:14,235 INFO L276 IsEmpty]: Start isEmpty. Operand 17750 states and 52652 transitions. [2021-04-15 02:22:14,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:14,250 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:14,250 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:14,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3334,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:14,451 INFO L428 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:14,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:14,451 INFO L82 PathProgramCache]: Analyzing trace with hash -673386348, now seen corresponding path program 326 times [2021-04-15 02:22:14,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:14,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240380550] [2021-04-15 02:22:14,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:14,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:14,575 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:14,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240380550] [2021-04-15 02:22:14,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39759567] [2021-04-15 02:22:14,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:22:14,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:14,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:14,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:14,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:14,668 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:14,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:14,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-04-15 02:22:14,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280452098] [2021-04-15 02:22:14,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:22:14,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:14,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:22:14,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:22:14,669 INFO L87 Difference]: Start difference. First operand 17750 states and 52652 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:15,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:15,096 INFO L93 Difference]: Finished difference Result 18572 states and 54522 transitions. [2021-04-15 02:22:15,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:22:15,097 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:15,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:15,135 INFO L225 Difference]: With dead ends: 18572 [2021-04-15 02:22:15,135 INFO L226 Difference]: Without dead ends: 18560 [2021-04-15 02:22:15,135 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 302.0ms TimeCoverageRelationStatistics Valid=315, Invalid=677, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:22:15,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18560 states. [2021-04-15 02:22:15,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18560 to 17743. [2021-04-15 02:22:15,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17743 states, 17742 states have (on average 2.966463758313606) internal successors, (52631), 17742 states have internal predecessors, (52631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:15,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17743 states to 17743 states and 52631 transitions. [2021-04-15 02:22:15,453 INFO L78 Accepts]: Start accepts. Automaton has 17743 states and 52631 transitions. Word has length 23 [2021-04-15 02:22:15,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:15,453 INFO L480 AbstractCegarLoop]: Abstraction has 17743 states and 52631 transitions. [2021-04-15 02:22:15,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:15,453 INFO L276 IsEmpty]: Start isEmpty. Operand 17743 states and 52631 transitions. [2021-04-15 02:22:15,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:15,473 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:15,473 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:15,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3335,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:15,673 INFO L428 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:15,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:15,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1862290286, now seen corresponding path program 327 times [2021-04-15 02:22:15,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:15,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712302270] [2021-04-15 02:22:15,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:15,787 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:15,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712302270] [2021-04-15 02:22:15,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527118361] [2021-04-15 02:22:15,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:15,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:22:15,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:15,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:22:15,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:15,860 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:15,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:15,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-04-15 02:22:15,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564000581] [2021-04-15 02:22:15,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:22:15,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:15,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:22:15,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:22:15,861 INFO L87 Difference]: Start difference. First operand 17743 states and 52631 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:16,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:16,158 INFO L93 Difference]: Finished difference Result 19073 states and 55761 transitions. [2021-04-15 02:22:16,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:22:16,159 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:16,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:16,197 INFO L225 Difference]: With dead ends: 19073 [2021-04-15 02:22:16,198 INFO L226 Difference]: Without dead ends: 19061 [2021-04-15 02:22:16,198 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 216.8ms TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:22:16,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19061 states. [2021-04-15 02:22:16,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19061 to 17743. [2021-04-15 02:22:16,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17743 states, 17742 states have (on average 2.966294668019389) internal successors, (52628), 17742 states have internal predecessors, (52628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:16,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17743 states to 17743 states and 52628 transitions. [2021-04-15 02:22:16,512 INFO L78 Accepts]: Start accepts. Automaton has 17743 states and 52628 transitions. Word has length 23 [2021-04-15 02:22:16,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:16,512 INFO L480 AbstractCegarLoop]: Abstraction has 17743 states and 52628 transitions. [2021-04-15 02:22:16,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:16,512 INFO L276 IsEmpty]: Start isEmpty. Operand 17743 states and 52628 transitions. [2021-04-15 02:22:16,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:16,532 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:16,532 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:16,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3336,329 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:16,732 INFO L428 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:16,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:16,733 INFO L82 PathProgramCache]: Analyzing trace with hash -71954318, now seen corresponding path program 328 times [2021-04-15 02:22:16,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:16,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249292802] [2021-04-15 02:22:16,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:16,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:16,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249292802] [2021-04-15 02:22:16,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833924777] [2021-04-15 02:22:16,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:16,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:22:16,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:16,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:22:16,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:16,885 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:22:16,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:16,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:22:16,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463101218] [2021-04-15 02:22:16,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:22:16,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:16,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:22:16,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:22:16,886 INFO L87 Difference]: Start difference. First operand 17743 states and 52628 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:17,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:17,028 INFO L93 Difference]: Finished difference Result 18066 states and 53107 transitions. [2021-04-15 02:22:17,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:22:17,028 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:17,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:17,065 INFO L225 Difference]: With dead ends: 18066 [2021-04-15 02:22:17,065 INFO L226 Difference]: Without dead ends: 18064 [2021-04-15 02:22:17,065 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:17,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18064 states. [2021-04-15 02:22:17,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18064 to 17735. [2021-04-15 02:22:17,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17735 states, 17734 states have (on average 2.966110296605391) internal successors, (52601), 17734 states have internal predecessors, (52601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:17,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17735 states to 17735 states and 52601 transitions. [2021-04-15 02:22:17,403 INFO L78 Accepts]: Start accepts. Automaton has 17735 states and 52601 transitions. Word has length 23 [2021-04-15 02:22:17,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:17,403 INFO L480 AbstractCegarLoop]: Abstraction has 17735 states and 52601 transitions. [2021-04-15 02:22:17,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:17,404 INFO L276 IsEmpty]: Start isEmpty. Operand 17735 states and 52601 transitions. [2021-04-15 02:22:17,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:17,423 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:17,423 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:17,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3337,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:17,624 INFO L428 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:17,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:17,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1673500372, now seen corresponding path program 329 times [2021-04-15 02:22:17,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:17,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170903315] [2021-04-15 02:22:17,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:17,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:17,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170903315] [2021-04-15 02:22:17,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496844598] [2021-04-15 02:22:17,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:17,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:22:17,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:17,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:17,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:17,773 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:22:17,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:17,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-04-15 02:22:17,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729589616] [2021-04-15 02:22:17,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:22:17,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:17,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:22:17,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:17,774 INFO L87 Difference]: Start difference. First operand 17735 states and 52601 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:17,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:17,939 INFO L93 Difference]: Finished difference Result 18041 states and 53023 transitions. [2021-04-15 02:22:17,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:22:17,939 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:17,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:17,976 INFO L225 Difference]: With dead ends: 18041 [2021-04-15 02:22:17,976 INFO L226 Difference]: Without dead ends: 18041 [2021-04-15 02:22:17,976 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:17,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18041 states. [2021-04-15 02:22:18,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18041 to 17719. [2021-04-15 02:22:18,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17719 states, 17718 states have (on average 2.9652895360650184) internal successors, (52539), 17718 states have internal predecessors, (52539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:18,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17719 states to 17719 states and 52539 transitions. [2021-04-15 02:22:18,360 INFO L78 Accepts]: Start accepts. Automaton has 17719 states and 52539 transitions. Word has length 23 [2021-04-15 02:22:18,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:18,360 INFO L480 AbstractCegarLoop]: Abstraction has 17719 states and 52539 transitions. [2021-04-15 02:22:18,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:18,360 INFO L276 IsEmpty]: Start isEmpty. Operand 17719 states and 52539 transitions. [2021-04-15 02:22:18,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:18,381 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:18,381 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:18,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3338 [2021-04-15 02:22:18,581 INFO L428 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:18,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:18,582 INFO L82 PathProgramCache]: Analyzing trace with hash -910853616, now seen corresponding path program 330 times [2021-04-15 02:22:18,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:18,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310652675] [2021-04-15 02:22:18,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:18,683 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:18,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310652675] [2021-04-15 02:22:18,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451891694] [2021-04-15 02:22:18,684 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:18,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:22:18,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:18,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:22:18,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:18,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:18,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:22:18,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716903310] [2021-04-15 02:22:18,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:22:18,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:18,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:22:18,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:18,792 INFO L87 Difference]: Start difference. First operand 17719 states and 52539 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:19,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:19,097 INFO L93 Difference]: Finished difference Result 18030 states and 52973 transitions. [2021-04-15 02:22:19,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:22:19,097 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:19,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:19,121 INFO L225 Difference]: With dead ends: 18030 [2021-04-15 02:22:19,121 INFO L226 Difference]: Without dead ends: 18027 [2021-04-15 02:22:19,121 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 191.4ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:22:19,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18027 states. [2021-04-15 02:22:19,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18027 to 17710. [2021-04-15 02:22:19,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17710 states, 17709 states have (on average 2.963973121011915) internal successors, (52489), 17709 states have internal predecessors, (52489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:19,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17710 states to 17710 states and 52489 transitions. [2021-04-15 02:22:19,385 INFO L78 Accepts]: Start accepts. Automaton has 17710 states and 52489 transitions. Word has length 23 [2021-04-15 02:22:19,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:19,385 INFO L480 AbstractCegarLoop]: Abstraction has 17710 states and 52489 transitions. [2021-04-15 02:22:19,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:19,385 INFO L276 IsEmpty]: Start isEmpty. Operand 17710 states and 52489 transitions. [2021-04-15 02:22:19,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:19,400 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:19,400 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:19,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3339,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:19,601 INFO L428 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:19,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:19,601 INFO L82 PathProgramCache]: Analyzing trace with hash 578551380, now seen corresponding path program 331 times [2021-04-15 02:22:19,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:19,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378825149] [2021-04-15 02:22:19,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:19,675 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:19,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378825149] [2021-04-15 02:22:19,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547737408] [2021-04-15 02:22:19,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:19,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:19,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:19,742 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:19,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:19,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-04-15 02:22:19,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124976396] [2021-04-15 02:22:19,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:22:19,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:19,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:22:19,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:19,742 INFO L87 Difference]: Start difference. First operand 17710 states and 52489 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:19,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:19,962 INFO L93 Difference]: Finished difference Result 18025 states and 52930 transitions. [2021-04-15 02:22:19,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:22:19,963 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:19,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:20,000 INFO L225 Difference]: With dead ends: 18025 [2021-04-15 02:22:20,000 INFO L226 Difference]: Without dead ends: 18021 [2021-04-15 02:22:20,000 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 137.2ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:22:20,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18021 states. [2021-04-15 02:22:20,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18021 to 17710. [2021-04-15 02:22:20,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17710 states, 17709 states have (on average 2.9626178779151844) internal successors, (52465), 17709 states have internal predecessors, (52465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:20,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17710 states to 17710 states and 52465 transitions. [2021-04-15 02:22:20,329 INFO L78 Accepts]: Start accepts. Automaton has 17710 states and 52465 transitions. Word has length 23 [2021-04-15 02:22:20,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:20,329 INFO L480 AbstractCegarLoop]: Abstraction has 17710 states and 52465 transitions. [2021-04-15 02:22:20,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:20,329 INFO L276 IsEmpty]: Start isEmpty. Operand 17710 states and 52465 transitions. [2021-04-15 02:22:20,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:20,350 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:20,350 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:20,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3340 [2021-04-15 02:22:20,550 INFO L428 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:20,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:20,551 INFO L82 PathProgramCache]: Analyzing trace with hash -494534000, now seen corresponding path program 332 times [2021-04-15 02:22:20,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:20,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912031211] [2021-04-15 02:22:20,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:20,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:20,643 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:20,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912031211] [2021-04-15 02:22:20,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052938040] [2021-04-15 02:22:20,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:20,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:20,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:20,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:20,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:22:20,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:20,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-04-15 02:22:20,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294970732] [2021-04-15 02:22:20,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:22:20,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:20,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:22:20,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:20,724 INFO L87 Difference]: Start difference. First operand 17710 states and 52465 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:20,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:20,991 INFO L93 Difference]: Finished difference Result 20107 states and 58655 transitions. [2021-04-15 02:22:20,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:22:20,992 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:20,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:21,033 INFO L225 Difference]: With dead ends: 20107 [2021-04-15 02:22:21,033 INFO L226 Difference]: Without dead ends: 20101 [2021-04-15 02:22:21,033 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 168.6ms TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:22:21,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20101 states. [2021-04-15 02:22:21,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20101 to 17710. [2021-04-15 02:22:21,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17710 states, 17709 states have (on average 2.962222598678638) internal successors, (52458), 17709 states have internal predecessors, (52458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:21,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17710 states to 17710 states and 52458 transitions. [2021-04-15 02:22:21,369 INFO L78 Accepts]: Start accepts. Automaton has 17710 states and 52458 transitions. Word has length 23 [2021-04-15 02:22:21,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:21,369 INFO L480 AbstractCegarLoop]: Abstraction has 17710 states and 52458 transitions. [2021-04-15 02:22:21,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:21,370 INFO L276 IsEmpty]: Start isEmpty. Operand 17710 states and 52458 transitions. [2021-04-15 02:22:21,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:21,389 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:21,389 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:21,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3341 [2021-04-15 02:22:21,589 INFO L428 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:21,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:21,590 INFO L82 PathProgramCache]: Analyzing trace with hash 599557588, now seen corresponding path program 333 times [2021-04-15 02:22:21,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:21,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521157663] [2021-04-15 02:22:21,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:21,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:21,695 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:21,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521157663] [2021-04-15 02:22:21,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204377737] [2021-04-15 02:22:21,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:21,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:22:21,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:21,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:22:21,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:21,854 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-04-15 02:22:21,871 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:21,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:21,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:22:21,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894502297] [2021-04-15 02:22:21,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:21,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:21,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:21,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:21,871 INFO L87 Difference]: Start difference. First operand 17710 states and 52458 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:22,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:22,159 INFO L93 Difference]: Finished difference Result 20128 states and 58673 transitions. [2021-04-15 02:22:22,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:22:22,160 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:22,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:22,203 INFO L225 Difference]: With dead ends: 20128 [2021-04-15 02:22:22,203 INFO L226 Difference]: Without dead ends: 20120 [2021-04-15 02:22:22,203 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 190.1ms TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:22:22,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20120 states. [2021-04-15 02:22:22,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20120 to 17811. [2021-04-15 02:22:22,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17811 states, 17810 states have (on average 2.9632229084783828) internal successors, (52775), 17810 states have internal predecessors, (52775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:22,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17811 states to 17811 states and 52775 transitions. [2021-04-15 02:22:22,561 INFO L78 Accepts]: Start accepts. Automaton has 17811 states and 52775 transitions. Word has length 23 [2021-04-15 02:22:22,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:22,562 INFO L480 AbstractCegarLoop]: Abstraction has 17811 states and 52775 transitions. [2021-04-15 02:22:22,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:22,562 INFO L276 IsEmpty]: Start isEmpty. Operand 17811 states and 52775 transitions. [2021-04-15 02:22:22,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:22,582 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:22,582 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:22,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3342 [2021-04-15 02:22:22,788 INFO L428 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:22,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:22,788 INFO L82 PathProgramCache]: Analyzing trace with hash 156658448, now seen corresponding path program 334 times [2021-04-15 02:22:22,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:22,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509975309] [2021-04-15 02:22:22,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:22,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:22,893 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:22,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509975309] [2021-04-15 02:22:22,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855398293] [2021-04-15 02:22:22,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:22,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:22:22,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:22,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:22,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:22,963 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:22:22,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:22,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-04-15 02:22:22,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758861341] [2021-04-15 02:22:22,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:22,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:22,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:22,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:22,964 INFO L87 Difference]: Start difference. First operand 17811 states and 52775 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:23,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:23,260 INFO L93 Difference]: Finished difference Result 19877 states and 57902 transitions. [2021-04-15 02:22:23,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:22:23,261 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:23,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:23,301 INFO L225 Difference]: With dead ends: 19877 [2021-04-15 02:22:23,301 INFO L226 Difference]: Without dead ends: 19867 [2021-04-15 02:22:23,302 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:22:23,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19867 states. [2021-04-15 02:22:23,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19867 to 17811. [2021-04-15 02:22:23,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17811 states, 17810 states have (on average 2.963054463784391) internal successors, (52772), 17810 states have internal predecessors, (52772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:23,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17811 states to 17811 states and 52772 transitions. [2021-04-15 02:22:23,628 INFO L78 Accepts]: Start accepts. Automaton has 17811 states and 52772 transitions. Word has length 23 [2021-04-15 02:22:23,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:23,628 INFO L480 AbstractCegarLoop]: Abstraction has 17811 states and 52772 transitions. [2021-04-15 02:22:23,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:23,628 INFO L276 IsEmpty]: Start isEmpty. Operand 17811 states and 52772 transitions. [2021-04-15 02:22:23,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:23,648 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:23,648 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:23,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3343,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:23,849 INFO L428 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:23,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:23,849 INFO L82 PathProgramCache]: Analyzing trace with hash -688313004, now seen corresponding path program 335 times [2021-04-15 02:22:23,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:23,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349444671] [2021-04-15 02:22:23,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:23,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:23,966 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:23,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349444671] [2021-04-15 02:22:23,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747666558] [2021-04-15 02:22:23,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:23,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:22:23,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:23,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:22:23,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:24,041 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:24,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:24,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-04-15 02:22:24,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867037733] [2021-04-15 02:22:24,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:22:24,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:24,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:22:24,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:22:24,042 INFO L87 Difference]: Start difference. First operand 17811 states and 52772 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:24,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:24,313 INFO L93 Difference]: Finished difference Result 19900 states and 57925 transitions. [2021-04-15 02:22:24,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:22:24,313 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:24,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:24,338 INFO L225 Difference]: With dead ends: 19900 [2021-04-15 02:22:24,339 INFO L226 Difference]: Without dead ends: 19888 [2021-04-15 02:22:24,339 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 221.3ms TimeCoverageRelationStatistics Valid=297, Invalid=633, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:22:24,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19888 states. [2021-04-15 02:22:24,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19888 to 17820. [2021-04-15 02:22:24,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17820 states, 17819 states have (on average 2.9629047645771367) internal successors, (52796), 17819 states have internal predecessors, (52796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:24,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17820 states to 17820 states and 52796 transitions. [2021-04-15 02:22:24,610 INFO L78 Accepts]: Start accepts. Automaton has 17820 states and 52796 transitions. Word has length 23 [2021-04-15 02:22:24,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:24,610 INFO L480 AbstractCegarLoop]: Abstraction has 17820 states and 52796 transitions. [2021-04-15 02:22:24,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:24,610 INFO L276 IsEmpty]: Start isEmpty. Operand 17820 states and 52796 transitions. [2021-04-15 02:22:24,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:24,625 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:24,625 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:24,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3344,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:24,825 INFO L428 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:24,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:24,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1112624240, now seen corresponding path program 336 times [2021-04-15 02:22:24,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:24,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768752293] [2021-04-15 02:22:24,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:24,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:24,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768752293] [2021-04-15 02:22:24,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602190108] [2021-04-15 02:22:24,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:24,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:22:24,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:24,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:22:24,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:25,006 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:25,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:25,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-04-15 02:22:25,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051203298] [2021-04-15 02:22:25,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:22:25,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:25,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:22:25,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:22:25,007 INFO L87 Difference]: Start difference. First operand 17820 states and 52796 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:25,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:25,417 INFO L93 Difference]: Finished difference Result 18844 states and 55132 transitions. [2021-04-15 02:22:25,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:22:25,418 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:25,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:25,457 INFO L225 Difference]: With dead ends: 18844 [2021-04-15 02:22:25,458 INFO L226 Difference]: Without dead ends: 18830 [2021-04-15 02:22:25,458 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 299.8ms TimeCoverageRelationStatistics Valid=384, Invalid=806, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:22:25,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18830 states. [2021-04-15 02:22:25,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18830 to 17820. [2021-04-15 02:22:25,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17820 states, 17819 states have (on average 2.9627925248330436) internal successors, (52794), 17819 states have internal predecessors, (52794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:25,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17820 states to 17820 states and 52794 transitions. [2021-04-15 02:22:25,837 INFO L78 Accepts]: Start accepts. Automaton has 17820 states and 52794 transitions. Word has length 23 [2021-04-15 02:22:25,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:25,837 INFO L480 AbstractCegarLoop]: Abstraction has 17820 states and 52794 transitions. [2021-04-15 02:22:25,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:25,838 INFO L276 IsEmpty]: Start isEmpty. Operand 17820 states and 52794 transitions. [2021-04-15 02:22:25,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:25,857 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:25,857 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:26,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3345 [2021-04-15 02:22:26,058 INFO L428 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:26,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:26,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1769822746, now seen corresponding path program 337 times [2021-04-15 02:22:26,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:26,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109923338] [2021-04-15 02:22:26,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:26,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109923338] [2021-04-15 02:22:26,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827502174] [2021-04-15 02:22:26,163 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:26,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:26,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:22:26,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 43 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:26,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:26,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:22:26,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168759866] [2021-04-15 02:22:26,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:26,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:26,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:26,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:26,243 INFO L87 Difference]: Start difference. First operand 17820 states and 52794 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:26,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:26,512 INFO L93 Difference]: Finished difference Result 17961 states and 52999 transitions. [2021-04-15 02:22:26,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:22:26,513 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:26,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:26,548 INFO L225 Difference]: With dead ends: 17961 [2021-04-15 02:22:26,548 INFO L226 Difference]: Without dead ends: 17955 [2021-04-15 02:22:26,549 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 186.0ms TimeCoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:22:26,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17955 states. [2021-04-15 02:22:26,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17955 to 17760. [2021-04-15 02:22:26,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17760 states, 17759 states have (on average 2.962160031533307) internal successors, (52605), 17759 states have internal predecessors, (52605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:26,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17760 states to 17760 states and 52605 transitions. [2021-04-15 02:22:26,849 INFO L78 Accepts]: Start accepts. Automaton has 17760 states and 52605 transitions. Word has length 23 [2021-04-15 02:22:26,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:26,849 INFO L480 AbstractCegarLoop]: Abstraction has 17760 states and 52605 transitions. [2021-04-15 02:22:26,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:26,850 INFO L276 IsEmpty]: Start isEmpty. Operand 17760 states and 52605 transitions. [2021-04-15 02:22:26,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:26,869 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:26,869 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:27,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3346,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:27,070 INFO L428 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:27,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:27,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1074657958, now seen corresponding path program 338 times [2021-04-15 02:22:27,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:27,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125701594] [2021-04-15 02:22:27,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:27,182 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:27,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125701594] [2021-04-15 02:22:27,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745756465] [2021-04-15 02:22:27,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:27,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:27,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:27,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:27,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 33 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:27,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:27,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-04-15 02:22:27,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443534878] [2021-04-15 02:22:27,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:22:27,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:27,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:22:27,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:22:27,253 INFO L87 Difference]: Start difference. First operand 17760 states and 52605 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:27,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:27,555 INFO L93 Difference]: Finished difference Result 18138 states and 53420 transitions. [2021-04-15 02:22:27,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:22:27,556 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:27,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:27,591 INFO L225 Difference]: With dead ends: 18138 [2021-04-15 02:22:27,592 INFO L226 Difference]: Without dead ends: 18126 [2021-04-15 02:22:27,592 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 214.5ms TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:22:27,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18126 states. [2021-04-15 02:22:27,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18126 to 17755. [2021-04-15 02:22:27,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17755 states, 17754 states have (on average 2.9613608200968797) internal successors, (52576), 17754 states have internal predecessors, (52576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:27,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17755 states to 17755 states and 52576 transitions. [2021-04-15 02:22:27,903 INFO L78 Accepts]: Start accepts. Automaton has 17755 states and 52576 transitions. Word has length 23 [2021-04-15 02:22:27,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:27,903 INFO L480 AbstractCegarLoop]: Abstraction has 17755 states and 52576 transitions. [2021-04-15 02:22:27,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:27,903 INFO L276 IsEmpty]: Start isEmpty. Operand 17755 states and 52576 transitions. [2021-04-15 02:22:27,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:27,922 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:27,922 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:28,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3347 [2021-04-15 02:22:28,123 INFO L428 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:28,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:28,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1282166328, now seen corresponding path program 339 times [2021-04-15 02:22:28,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:28,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814728434] [2021-04-15 02:22:28,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:28,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:28,214 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:28,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814728434] [2021-04-15 02:22:28,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152028069] [2021-04-15 02:22:28,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:28,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:22:28,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:28,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:22:28,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:28,290 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:28,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:28,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:22:28,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344725143] [2021-04-15 02:22:28,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:22:28,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:28,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:22:28,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:28,291 INFO L87 Difference]: Start difference. First operand 17755 states and 52576 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:28,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:28,545 INFO L93 Difference]: Finished difference Result 18122 states and 53190 transitions. [2021-04-15 02:22:28,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:22:28,546 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:28,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:28,580 INFO L225 Difference]: With dead ends: 18122 [2021-04-15 02:22:28,581 INFO L226 Difference]: Without dead ends: 18113 [2021-04-15 02:22:28,581 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 164.6ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:22:28,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18113 states. [2021-04-15 02:22:28,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18113 to 17738. [2021-04-15 02:22:28,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17738 states, 17737 states have (on average 2.960139820713762) internal successors, (52504), 17737 states have internal predecessors, (52504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:28,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17738 states to 17738 states and 52504 transitions. [2021-04-15 02:22:28,881 INFO L78 Accepts]: Start accepts. Automaton has 17738 states and 52504 transitions. Word has length 23 [2021-04-15 02:22:28,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:28,881 INFO L480 AbstractCegarLoop]: Abstraction has 17738 states and 52504 transitions. [2021-04-15 02:22:28,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:28,882 INFO L276 IsEmpty]: Start isEmpty. Operand 17738 states and 52504 transitions. [2021-04-15 02:22:28,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:28,896 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:28,896 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:29,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3348,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:29,097 INFO L428 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:29,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:29,097 INFO L82 PathProgramCache]: Analyzing trace with hash -188074740, now seen corresponding path program 340 times [2021-04-15 02:22:29,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:29,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409162545] [2021-04-15 02:22:29,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:29,180 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:29,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409162545] [2021-04-15 02:22:29,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249720537] [2021-04-15 02:22:29,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:29,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:22:29,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:29,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:29,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:29,243 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:29,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:29,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-04-15 02:22:29,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528416837] [2021-04-15 02:22:29,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:29,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:29,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:29,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:29,243 INFO L87 Difference]: Start difference. First operand 17738 states and 52504 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:29,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:29,470 INFO L93 Difference]: Finished difference Result 18117 states and 53136 transitions. [2021-04-15 02:22:29,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:22:29,470 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:29,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:29,491 INFO L225 Difference]: With dead ends: 18117 [2021-04-15 02:22:29,491 INFO L226 Difference]: Without dead ends: 18109 [2021-04-15 02:22:29,491 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 155.6ms TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:22:29,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18109 states. [2021-04-15 02:22:29,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18109 to 17756. [2021-04-15 02:22:29,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17756 states, 17755 states have (on average 2.9588848211771333) internal successors, (52535), 17755 states have internal predecessors, (52535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:29,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17756 states to 17756 states and 52535 transitions. [2021-04-15 02:22:29,909 INFO L78 Accepts]: Start accepts. Automaton has 17756 states and 52535 transitions. Word has length 23 [2021-04-15 02:22:29,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:29,909 INFO L480 AbstractCegarLoop]: Abstraction has 17756 states and 52535 transitions. [2021-04-15 02:22:29,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:29,909 INFO L276 IsEmpty]: Start isEmpty. Operand 17756 states and 52535 transitions. [2021-04-15 02:22:29,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:29,932 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:29,932 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:30,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3349,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:30,132 INFO L428 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:30,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:30,133 INFO L82 PathProgramCache]: Analyzing trace with hash -630973880, now seen corresponding path program 341 times [2021-04-15 02:22:30,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:30,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063701809] [2021-04-15 02:22:30,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:30,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:30,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063701809] [2021-04-15 02:22:30,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330900459] [2021-04-15 02:22:30,252 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:30,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:22:30,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:30,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:30,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:22:30,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:30,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-04-15 02:22:30,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728418234] [2021-04-15 02:22:30,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:30,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:30,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:30,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:30,331 INFO L87 Difference]: Start difference. First operand 17756 states and 52535 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:30,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:30,668 INFO L93 Difference]: Finished difference Result 19811 states and 57453 transitions. [2021-04-15 02:22:30,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:22:30,669 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:30,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:30,713 INFO L225 Difference]: With dead ends: 19811 [2021-04-15 02:22:30,713 INFO L226 Difference]: Without dead ends: 19801 [2021-04-15 02:22:30,714 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 243.9ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:22:30,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19801 states. [2021-04-15 02:22:31,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19801 to 17805. [2021-04-15 02:22:31,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17805 states, 17804 states have (on average 2.9582116378341947) internal successors, (52668), 17804 states have internal predecessors, (52668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:31,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17805 states to 17805 states and 52668 transitions. [2021-04-15 02:22:31,093 INFO L78 Accepts]: Start accepts. Automaton has 17805 states and 52668 transitions. Word has length 23 [2021-04-15 02:22:31,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:31,093 INFO L480 AbstractCegarLoop]: Abstraction has 17805 states and 52668 transitions. [2021-04-15 02:22:31,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:31,093 INFO L276 IsEmpty]: Start isEmpty. Operand 17805 states and 52668 transitions. [2021-04-15 02:22:31,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:31,113 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:31,113 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:31,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3350 [2021-04-15 02:22:31,313 INFO L428 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:31,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:31,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1475945332, now seen corresponding path program 342 times [2021-04-15 02:22:31,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:31,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434224771] [2021-04-15 02:22:31,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:31,430 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:31,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434224771] [2021-04-15 02:22:31,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581813034] [2021-04-15 02:22:31,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:31,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:22:31,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:31,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:22:31,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:31,505 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:31,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:31,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-04-15 02:22:31,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44651430] [2021-04-15 02:22:31,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:22:31,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:31,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:22:31,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:22:31,506 INFO L87 Difference]: Start difference. First operand 17805 states and 52668 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:31,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:31,835 INFO L93 Difference]: Finished difference Result 19831 states and 57467 transitions. [2021-04-15 02:22:31,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:22:31,836 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:31,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:31,877 INFO L225 Difference]: With dead ends: 19831 [2021-04-15 02:22:31,877 INFO L226 Difference]: Without dead ends: 19819 [2021-04-15 02:22:31,877 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 244.5ms TimeCoverageRelationStatistics Valid=298, Invalid=632, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:22:31,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19819 states. [2021-04-15 02:22:32,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19819 to 17849. [2021-04-15 02:22:32,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17849 states, 17848 states have (on average 2.9575302554908114) internal successors, (52786), 17848 states have internal predecessors, (52786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:32,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17849 states to 17849 states and 52786 transitions. [2021-04-15 02:22:32,213 INFO L78 Accepts]: Start accepts. Automaton has 17849 states and 52786 transitions. Word has length 23 [2021-04-15 02:22:32,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:32,213 INFO L480 AbstractCegarLoop]: Abstraction has 17849 states and 52786 transitions. [2021-04-15 02:22:32,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:32,213 INFO L276 IsEmpty]: Start isEmpty. Operand 17849 states and 52786 transitions. [2021-04-15 02:22:32,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:32,234 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:32,234 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:32,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3351,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:32,434 INFO L428 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:32,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:32,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1900256568, now seen corresponding path program 343 times [2021-04-15 02:22:32,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:32,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624175717] [2021-04-15 02:22:32,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:32,555 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:32,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624175717] [2021-04-15 02:22:32,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241059920] [2021-04-15 02:22:32,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:32,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:32,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:32,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:32,624 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:32,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:32,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-04-15 02:22:32,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922542018] [2021-04-15 02:22:32,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:22:32,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:32,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:22:32,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:22:32,625 INFO L87 Difference]: Start difference. First operand 17849 states and 52786 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:33,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:33,019 INFO L93 Difference]: Finished difference Result 19267 states and 56030 transitions. [2021-04-15 02:22:33,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:22:33,019 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:33,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:33,058 INFO L225 Difference]: With dead ends: 19267 [2021-04-15 02:22:33,058 INFO L226 Difference]: Without dead ends: 19253 [2021-04-15 02:22:33,058 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 310.8ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:22:33,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19253 states. [2021-04-15 02:22:33,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19253 to 17849. [2021-04-15 02:22:33,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17849 states, 17848 states have (on average 2.9572501120573733) internal successors, (52781), 17848 states have internal predecessors, (52781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:33,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17849 states to 17849 states and 52781 transitions. [2021-04-15 02:22:33,345 INFO L78 Accepts]: Start accepts. Automaton has 17849 states and 52781 transitions. Word has length 23 [2021-04-15 02:22:33,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:33,345 INFO L480 AbstractCegarLoop]: Abstraction has 17849 states and 52781 transitions. [2021-04-15 02:22:33,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:33,345 INFO L276 IsEmpty]: Start isEmpty. Operand 17849 states and 52781 transitions. [2021-04-15 02:22:33,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:33,360 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:33,360 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:33,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3352 [2021-04-15 02:22:33,561 INFO L428 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:33,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:33,561 INFO L82 PathProgramCache]: Analyzing trace with hash -2144238716, now seen corresponding path program 344 times [2021-04-15 02:22:33,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:33,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325711654] [2021-04-15 02:22:33,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:33,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:33,632 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:33,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325711654] [2021-04-15 02:22:33,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768986271] [2021-04-15 02:22:33,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:33,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:33,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:33,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:22:33,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:33,703 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 41 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:33,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:33,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:22:33,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563002502] [2021-04-15 02:22:33,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:22:33,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:33,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:22:33,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:33,704 INFO L87 Difference]: Start difference. First operand 17849 states and 52781 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:33,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:33,865 INFO L93 Difference]: Finished difference Result 18130 states and 53192 transitions. [2021-04-15 02:22:33,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:22:33,866 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:33,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:33,886 INFO L225 Difference]: With dead ends: 18130 [2021-04-15 02:22:33,887 INFO L226 Difference]: Without dead ends: 18126 [2021-04-15 02:22:33,887 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:22:33,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18126 states. [2021-04-15 02:22:34,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18126 to 17787. [2021-04-15 02:22:34,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17787 states, 17786 states have (on average 2.9562015068031036) internal successors, (52579), 17786 states have internal predecessors, (52579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:34,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17787 states to 17787 states and 52579 transitions. [2021-04-15 02:22:34,181 INFO L78 Accepts]: Start accepts. Automaton has 17787 states and 52579 transitions. Word has length 23 [2021-04-15 02:22:34,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:34,181 INFO L480 AbstractCegarLoop]: Abstraction has 17787 states and 52579 transitions. [2021-04-15 02:22:34,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:34,181 INFO L276 IsEmpty]: Start isEmpty. Operand 17787 states and 52579 transitions. [2021-04-15 02:22:34,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:34,203 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:34,203 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:34,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3353 [2021-04-15 02:22:34,404 INFO L428 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:34,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:34,404 INFO L82 PathProgramCache]: Analyzing trace with hash 907814562, now seen corresponding path program 345 times [2021-04-15 02:22:34,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:34,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668776772] [2021-04-15 02:22:34,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:34,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:34,613 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:34,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668776772] [2021-04-15 02:22:34,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995750776] [2021-04-15 02:22:34,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:34,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:22:34,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:34,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:22:34,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:34,694 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:34,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:34,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:22:34,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276781771] [2021-04-15 02:22:34,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:22:34,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:34,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:22:34,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:22:34,695 INFO L87 Difference]: Start difference. First operand 17787 states and 52579 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:35,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:35,005 INFO L93 Difference]: Finished difference Result 18203 states and 53300 transitions. [2021-04-15 02:22:35,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:22:35,006 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:35,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:35,044 INFO L225 Difference]: With dead ends: 18203 [2021-04-15 02:22:35,044 INFO L226 Difference]: Without dead ends: 18188 [2021-04-15 02:22:35,044 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 219.1ms TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:22:35,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18188 states. [2021-04-15 02:22:35,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18188 to 17734. [2021-04-15 02:22:35,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17734 states, 17733 states have (on average 2.9543224496701064) internal successors, (52389), 17733 states have internal predecessors, (52389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:35,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17734 states to 17734 states and 52389 transitions. [2021-04-15 02:22:35,390 INFO L78 Accepts]: Start accepts. Automaton has 17734 states and 52389 transitions. Word has length 23 [2021-04-15 02:22:35,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:35,390 INFO L480 AbstractCegarLoop]: Abstraction has 17734 states and 52389 transitions. [2021-04-15 02:22:35,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:35,390 INFO L276 IsEmpty]: Start isEmpty. Operand 17734 states and 52389 transitions. [2021-04-15 02:22:35,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:35,412 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:35,412 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:35,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3354,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:35,613 INFO L428 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:35,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:35,613 INFO L82 PathProgramCache]: Analyzing trace with hash 62843110, now seen corresponding path program 346 times [2021-04-15 02:22:35,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:35,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836349838] [2021-04-15 02:22:35,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:35,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:35,730 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:35,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836349838] [2021-04-15 02:22:35,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946538365] [2021-04-15 02:22:35,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:35,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:22:35,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:35,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:35,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:35,810 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 33 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:35,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:35,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-04-15 02:22:35,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712562186] [2021-04-15 02:22:35,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:22:35,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:35,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:22:35,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:22:35,811 INFO L87 Difference]: Start difference. First operand 17734 states and 52389 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:36,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:36,146 INFO L93 Difference]: Finished difference Result 18155 states and 53119 transitions. [2021-04-15 02:22:36,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:22:36,147 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:36,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:36,185 INFO L225 Difference]: With dead ends: 18155 [2021-04-15 02:22:36,185 INFO L226 Difference]: Without dead ends: 18143 [2021-04-15 02:22:36,185 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 240.5ms TimeCoverageRelationStatistics Valid=297, Invalid=633, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:22:36,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18143 states. [2021-04-15 02:22:36,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18143 to 17705. [2021-04-15 02:22:36,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17705 states, 17704 states have (on average 2.9526660641662903) internal successors, (52274), 17704 states have internal predecessors, (52274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:36,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17705 states to 17705 states and 52274 transitions. [2021-04-15 02:22:36,521 INFO L78 Accepts]: Start accepts. Automaton has 17705 states and 52274 transitions. Word has length 23 [2021-04-15 02:22:36,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:36,521 INFO L480 AbstractCegarLoop]: Abstraction has 17705 states and 52274 transitions. [2021-04-15 02:22:36,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:36,521 INFO L276 IsEmpty]: Start isEmpty. Operand 17705 states and 52274 transitions. [2021-04-15 02:22:36,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:36,542 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:36,542 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:36,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3355,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:36,742 INFO L428 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:36,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:36,742 INFO L82 PathProgramCache]: Analyzing trace with hash -361468126, now seen corresponding path program 347 times [2021-04-15 02:22:36,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:36,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444974668] [2021-04-15 02:22:36,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:36,866 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:36,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444974668] [2021-04-15 02:22:36,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77033945] [2021-04-15 02:22:36,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:36,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:22:36,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:36,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:22:36,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:36,948 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:36,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:36,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-04-15 02:22:36,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137724307] [2021-04-15 02:22:36,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:22:36,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:36,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:22:36,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:22:36,949 INFO L87 Difference]: Start difference. First operand 17705 states and 52274 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:37,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:37,355 INFO L93 Difference]: Finished difference Result 18640 states and 54430 transitions. [2021-04-15 02:22:37,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:22:37,356 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:37,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:37,392 INFO L225 Difference]: With dead ends: 18640 [2021-04-15 02:22:37,392 INFO L226 Difference]: Without dead ends: 18626 [2021-04-15 02:22:37,393 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 302.5ms TimeCoverageRelationStatistics Valid=378, Invalid=812, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:22:37,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18626 states. [2021-04-15 02:22:37,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18626 to 17706. [2021-04-15 02:22:37,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17706 states, 17705 states have (on average 2.952216887884778) internal successors, (52269), 17705 states have internal predecessors, (52269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:37,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17706 states to 17706 states and 52269 transitions. [2021-04-15 02:22:37,676 INFO L78 Accepts]: Start accepts. Automaton has 17706 states and 52269 transitions. Word has length 23 [2021-04-15 02:22:37,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:37,676 INFO L480 AbstractCegarLoop]: Abstraction has 17706 states and 52269 transitions. [2021-04-15 02:22:37,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:37,676 INFO L276 IsEmpty]: Start isEmpty. Operand 17706 states and 52269 transitions. [2021-04-15 02:22:37,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:37,690 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:37,690 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:37,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3356,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:37,891 INFO L428 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:37,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:37,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1602127322, now seen corresponding path program 348 times [2021-04-15 02:22:37,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:37,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012738376] [2021-04-15 02:22:37,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:37,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:37,987 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:37,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012738376] [2021-04-15 02:22:37,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837375531] [2021-04-15 02:22:37,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:38,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:22:38,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:38,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:22:38,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:38,064 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:38,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:38,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:22:38,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555924311] [2021-04-15 02:22:38,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:22:38,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:38,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:22:38,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:38,065 INFO L87 Difference]: Start difference. First operand 17706 states and 52269 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:38,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:38,197 INFO L93 Difference]: Finished difference Result 18069 states and 52830 transitions. [2021-04-15 02:22:38,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:22:38,201 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:38,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:38,226 INFO L225 Difference]: With dead ends: 18069 [2021-04-15 02:22:38,226 INFO L226 Difference]: Without dead ends: 18069 [2021-04-15 02:22:38,226 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:22:38,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18069 states. [2021-04-15 02:22:38,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18069 to 17709. [2021-04-15 02:22:38,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17709 states, 17708 states have (on average 2.9522249830585046) internal successors, (52278), 17708 states have internal predecessors, (52278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:38,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17709 states to 17709 states and 52278 transitions. [2021-04-15 02:22:38,542 INFO L78 Accepts]: Start accepts. Automaton has 17709 states and 52278 transitions. Word has length 23 [2021-04-15 02:22:38,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:38,542 INFO L480 AbstractCegarLoop]: Abstraction has 17709 states and 52278 transitions. [2021-04-15 02:22:38,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:38,543 INFO L276 IsEmpty]: Start isEmpty. Operand 17709 states and 52278 transitions. [2021-04-15 02:22:38,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:38,562 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:38,562 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:38,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3357 [2021-04-15 02:22:38,763 INFO L428 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:38,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:38,763 INFO L82 PathProgramCache]: Analyzing trace with hash 935096200, now seen corresponding path program 349 times [2021-04-15 02:22:38,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:38,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898271344] [2021-04-15 02:22:38,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:38,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:38,894 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:38,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898271344] [2021-04-15 02:22:38,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988224952] [2021-04-15 02:22:38,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:38,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:38,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:39,030 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:39,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:39,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-04-15 02:22:39,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590637888] [2021-04-15 02:22:39,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:22:39,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:39,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:22:39,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:22:39,031 INFO L87 Difference]: Start difference. First operand 17709 states and 52278 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:39,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:39,383 INFO L93 Difference]: Finished difference Result 19393 states and 56292 transitions. [2021-04-15 02:22:39,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:22:39,384 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:39,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:39,424 INFO L225 Difference]: With dead ends: 19393 [2021-04-15 02:22:39,424 INFO L226 Difference]: Without dead ends: 19379 [2021-04-15 02:22:39,424 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 275.0ms TimeCoverageRelationStatistics Valid=318, Invalid=674, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:22:39,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19379 states. [2021-04-15 02:22:39,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19379 to 17740. [2021-04-15 02:22:39,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17740 states, 17739 states have (on average 2.9508991487682508) internal successors, (52346), 17739 states have internal predecessors, (52346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:39,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17740 states to 17740 states and 52346 transitions. [2021-04-15 02:22:39,775 INFO L78 Accepts]: Start accepts. Automaton has 17740 states and 52346 transitions. Word has length 23 [2021-04-15 02:22:39,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:39,775 INFO L480 AbstractCegarLoop]: Abstraction has 17740 states and 52346 transitions. [2021-04-15 02:22:39,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:39,775 INFO L276 IsEmpty]: Start isEmpty. Operand 17740 states and 52346 transitions. [2021-04-15 02:22:39,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:39,797 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:39,798 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:39,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3358,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:39,998 INFO L428 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:39,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:39,998 INFO L82 PathProgramCache]: Analyzing trace with hash 216475460, now seen corresponding path program 350 times [2021-04-15 02:22:39,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:39,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803314268] [2021-04-15 02:22:39,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:40,075 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:40,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803314268] [2021-04-15 02:22:40,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727915361] [2021-04-15 02:22:40,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:40,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:40,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:40,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:40,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:22:40,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:40,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-04-15 02:22:40,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105262962] [2021-04-15 02:22:40,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:22:40,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:40,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:22:40,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:40,156 INFO L87 Difference]: Start difference. First operand 17740 states and 52346 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:40,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:40,311 INFO L93 Difference]: Finished difference Result 18165 states and 52994 transitions. [2021-04-15 02:22:40,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:22:40,312 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:40,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:40,348 INFO L225 Difference]: With dead ends: 18165 [2021-04-15 02:22:40,349 INFO L226 Difference]: Without dead ends: 18165 [2021-04-15 02:22:40,349 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:40,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18165 states. [2021-04-15 02:22:40,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18165 to 17749. [2021-04-15 02:22:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17749 states, 17748 states have (on average 2.9512621140410187) internal successors, (52379), 17748 states have internal predecessors, (52379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:40,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17749 states to 17749 states and 52379 transitions. [2021-04-15 02:22:40,692 INFO L78 Accepts]: Start accepts. Automaton has 17749 states and 52379 transitions. Word has length 23 [2021-04-15 02:22:40,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:40,692 INFO L480 AbstractCegarLoop]: Abstraction has 17749 states and 52379 transitions. [2021-04-15 02:22:40,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:40,692 INFO L276 IsEmpty]: Start isEmpty. Operand 17749 states and 52379 transitions. [2021-04-15 02:22:40,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:40,713 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:40,713 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:40,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3359,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:40,913 INFO L428 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:40,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:40,913 INFO L82 PathProgramCache]: Analyzing trace with hash -622423838, now seen corresponding path program 351 times [2021-04-15 02:22:40,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:40,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114019758] [2021-04-15 02:22:40,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 35 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:40,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114019758] [2021-04-15 02:22:40,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513937669] [2021-04-15 02:22:40,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:41,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:22:41,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:41,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:22:41,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:41,070 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 35 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:41,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:41,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:22:41,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276270024] [2021-04-15 02:22:41,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:22:41,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:41,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:22:41,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:41,071 INFO L87 Difference]: Start difference. First operand 17749 states and 52379 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:41,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:41,334 INFO L93 Difference]: Finished difference Result 18087 states and 52839 transitions. [2021-04-15 02:22:41,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:22:41,335 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:41,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:41,375 INFO L225 Difference]: With dead ends: 18087 [2021-04-15 02:22:41,376 INFO L226 Difference]: Without dead ends: 18085 [2021-04-15 02:22:41,376 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 150.4ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:22:41,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18085 states. [2021-04-15 02:22:41,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18085 to 17749. [2021-04-15 02:22:41,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17749 states, 17748 states have (on average 2.9509240477800316) internal successors, (52373), 17748 states have internal predecessors, (52373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:41,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17749 states to 17749 states and 52373 transitions. [2021-04-15 02:22:41,715 INFO L78 Accepts]: Start accepts. Automaton has 17749 states and 52373 transitions. Word has length 23 [2021-04-15 02:22:41,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:41,715 INFO L480 AbstractCegarLoop]: Abstraction has 17749 states and 52373 transitions. [2021-04-15 02:22:41,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:41,715 INFO L276 IsEmpty]: Start isEmpty. Operand 17749 states and 52373 transitions. [2021-04-15 02:22:41,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:41,733 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:41,733 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:41,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3360 [2021-04-15 02:22:41,934 INFO L428 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:41,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:41,934 INFO L82 PathProgramCache]: Analyzing trace with hash 866981158, now seen corresponding path program 352 times [2021-04-15 02:22:41,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:41,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77842876] [2021-04-15 02:22:41,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:41,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:42,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77842876] [2021-04-15 02:22:42,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313914553] [2021-04-15 02:22:42,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:42,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:22:42,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:42,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:42,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:22:42,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:42,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-04-15 02:22:42,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046649990] [2021-04-15 02:22:42,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:22:42,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:42,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:22:42,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:42,103 INFO L87 Difference]: Start difference. First operand 17749 states and 52373 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:42,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:42,333 INFO L93 Difference]: Finished difference Result 18093 states and 52841 transitions. [2021-04-15 02:22:42,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:22:42,334 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:42,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:42,357 INFO L225 Difference]: With dead ends: 18093 [2021-04-15 02:22:42,357 INFO L226 Difference]: Without dead ends: 18089 [2021-04-15 02:22:42,358 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:22:42,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18089 states. [2021-04-15 02:22:42,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18089 to 17749. [2021-04-15 02:22:42,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17749 states, 17748 states have (on average 2.94990984899707) internal successors, (52355), 17748 states have internal predecessors, (52355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:42,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17749 states to 17749 states and 52355 transitions. [2021-04-15 02:22:42,637 INFO L78 Accepts]: Start accepts. Automaton has 17749 states and 52355 transitions. Word has length 23 [2021-04-15 02:22:42,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:42,637 INFO L480 AbstractCegarLoop]: Abstraction has 17749 states and 52355 transitions. [2021-04-15 02:22:42,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:42,638 INFO L276 IsEmpty]: Start isEmpty. Operand 17749 states and 52355 transitions. [2021-04-15 02:22:42,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:42,652 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:42,652 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:42,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3361,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:42,853 INFO L428 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:42,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:42,853 INFO L82 PathProgramCache]: Analyzing trace with hash -206104222, now seen corresponding path program 353 times [2021-04-15 02:22:42,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:42,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231098998] [2021-04-15 02:22:42,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:42,927 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:42,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231098998] [2021-04-15 02:22:42,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488062483] [2021-04-15 02:22:42,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:42,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:22:42,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:42,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:42,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:43,002 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 33 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:43,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:43,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-04-15 02:22:43,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030385871] [2021-04-15 02:22:43,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:43,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:43,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:43,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:43,003 INFO L87 Difference]: Start difference. First operand 17749 states and 52355 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:43,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:43,310 INFO L93 Difference]: Finished difference Result 18102 states and 52836 transitions. [2021-04-15 02:22:43,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:22:43,311 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:43,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:43,348 INFO L225 Difference]: With dead ends: 18102 [2021-04-15 02:22:43,349 INFO L226 Difference]: Without dead ends: 18096 [2021-04-15 02:22:43,349 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 173.4ms TimeCoverageRelationStatistics Valid=233, Invalid=469, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:22:43,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18096 states. [2021-04-15 02:22:43,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18096 to 17749. [2021-04-15 02:22:43,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17749 states, 17748 states have (on average 2.948388550822628) internal successors, (52328), 17748 states have internal predecessors, (52328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:43,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17749 states to 17749 states and 52328 transitions. [2021-04-15 02:22:43,682 INFO L78 Accepts]: Start accepts. Automaton has 17749 states and 52328 transitions. Word has length 23 [2021-04-15 02:22:43,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:43,682 INFO L480 AbstractCegarLoop]: Abstraction has 17749 states and 52328 transitions. [2021-04-15 02:22:43,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:43,682 INFO L276 IsEmpty]: Start isEmpty. Operand 17749 states and 52328 transitions. [2021-04-15 02:22:43,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:43,703 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:43,703 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:43,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3362 [2021-04-15 02:22:43,903 INFO L428 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:43,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:43,903 INFO L82 PathProgramCache]: Analyzing trace with hash 887987366, now seen corresponding path program 354 times [2021-04-15 02:22:43,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:43,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468121687] [2021-04-15 02:22:43,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:43,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:44,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468121687] [2021-04-15 02:22:44,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639121723] [2021-04-15 02:22:44,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:44,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:22:44,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:44,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:22:44,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:44,185 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:44,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:44,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:22:44,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059900318] [2021-04-15 02:22:44,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:44,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:44,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:44,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:44,186 INFO L87 Difference]: Start difference. First operand 17749 states and 52328 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:44,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:44,521 INFO L93 Difference]: Finished difference Result 20612 states and 59720 transitions. [2021-04-15 02:22:44,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:22:44,522 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:44,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:44,565 INFO L225 Difference]: With dead ends: 20612 [2021-04-15 02:22:44,565 INFO L226 Difference]: Without dead ends: 20604 [2021-04-15 02:22:44,566 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 212.8ms TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:22:44,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20604 states. [2021-04-15 02:22:44,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20604 to 17773. [2021-04-15 02:22:44,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17773 states, 17772 states have (on average 2.9481769074949358) internal successors, (52395), 17772 states have internal predecessors, (52395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:44,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17773 states to 17773 states and 52395 transitions. [2021-04-15 02:22:44,925 INFO L78 Accepts]: Start accepts. Automaton has 17773 states and 52395 transitions. Word has length 23 [2021-04-15 02:22:44,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:44,925 INFO L480 AbstractCegarLoop]: Abstraction has 17773 states and 52395 transitions. [2021-04-15 02:22:44,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:44,925 INFO L276 IsEmpty]: Start isEmpty. Operand 17773 states and 52395 transitions. [2021-04-15 02:22:44,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:44,946 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:44,946 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:45,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3363 [2021-04-15 02:22:45,147 INFO L428 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:45,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:45,147 INFO L82 PathProgramCache]: Analyzing trace with hash 445088226, now seen corresponding path program 355 times [2021-04-15 02:22:45,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:45,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199579575] [2021-04-15 02:22:45,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:45,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:45,261 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:45,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199579575] [2021-04-15 02:22:45,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659793969] [2021-04-15 02:22:45,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:45,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:45,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:45,343 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:45,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:45,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-04-15 02:22:45,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62978651] [2021-04-15 02:22:45,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:22:45,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:45,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:22:45,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:22:45,343 INFO L87 Difference]: Start difference. First operand 17773 states and 52395 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:45,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:45,689 INFO L93 Difference]: Finished difference Result 20639 states and 59747 transitions. [2021-04-15 02:22:45,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:22:45,690 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:45,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:45,725 INFO L225 Difference]: With dead ends: 20639 [2021-04-15 02:22:45,725 INFO L226 Difference]: Without dead ends: 20629 [2021-04-15 02:22:45,725 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 242.3ms TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:22:45,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20629 states. [2021-04-15 02:22:45,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20629 to 17895. [2021-04-15 02:22:46,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17895 states, 17894 states have (on average 2.948418464289706) internal successors, (52759), 17894 states have internal predecessors, (52759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:46,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17895 states to 17895 states and 52759 transitions. [2021-04-15 02:22:46,047 INFO L78 Accepts]: Start accepts. Automaton has 17895 states and 52759 transitions. Word has length 23 [2021-04-15 02:22:46,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:46,047 INFO L480 AbstractCegarLoop]: Abstraction has 17895 states and 52759 transitions. [2021-04-15 02:22:46,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:46,048 INFO L276 IsEmpty]: Start isEmpty. Operand 17895 states and 52759 transitions. [2021-04-15 02:22:46,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:46,062 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:46,062 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:46,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3364 [2021-04-15 02:22:46,263 INFO L428 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:46,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:46,263 INFO L82 PathProgramCache]: Analyzing trace with hash -399883226, now seen corresponding path program 356 times [2021-04-15 02:22:46,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:46,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810076728] [2021-04-15 02:22:46,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:46,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810076728] [2021-04-15 02:22:46,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030334418] [2021-04-15 02:22:46,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:46,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:46,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:46,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:46,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:46,445 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:22:46,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:46,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-04-15 02:22:46,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375485122] [2021-04-15 02:22:46,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:22:46,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:46,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:22:46,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:22:46,446 INFO L87 Difference]: Start difference. First operand 17895 states and 52759 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:46,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:46,773 INFO L93 Difference]: Finished difference Result 20525 states and 59344 transitions. [2021-04-15 02:22:46,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:22:46,774 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:46,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:46,817 INFO L225 Difference]: With dead ends: 20525 [2021-04-15 02:22:46,817 INFO L226 Difference]: Without dead ends: 20513 [2021-04-15 02:22:46,818 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 230.8ms TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:22:46,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20513 states. [2021-04-15 02:22:47,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20513 to 17903. [2021-04-15 02:22:47,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17903 states, 17902 states have (on average 2.948218076192604) internal successors, (52779), 17902 states have internal predecessors, (52779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:47,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17903 states to 17903 states and 52779 transitions. [2021-04-15 02:22:47,162 INFO L78 Accepts]: Start accepts. Automaton has 17903 states and 52779 transitions. Word has length 23 [2021-04-15 02:22:47,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:47,162 INFO L480 AbstractCegarLoop]: Abstraction has 17903 states and 52779 transitions. [2021-04-15 02:22:47,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:47,162 INFO L276 IsEmpty]: Start isEmpty. Operand 17903 states and 52779 transitions. [2021-04-15 02:22:47,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:47,182 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:47,182 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:47,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3365,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:47,382 INFO L428 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:47,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:47,383 INFO L82 PathProgramCache]: Analyzing trace with hash -824194462, now seen corresponding path program 357 times [2021-04-15 02:22:47,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:47,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703782468] [2021-04-15 02:22:47,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:47,511 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:47,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703782468] [2021-04-15 02:22:47,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546037597] [2021-04-15 02:22:47,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:47,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:22:47,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:47,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:22:47,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:47,594 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:47,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:47,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-04-15 02:22:47,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105437274] [2021-04-15 02:22:47,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:22:47,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:47,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:22:47,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:22:47,595 INFO L87 Difference]: Start difference. First operand 17903 states and 52779 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:48,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:48,021 INFO L93 Difference]: Finished difference Result 20558 states and 59379 transitions. [2021-04-15 02:22:48,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:22:48,022 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:48,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:48,065 INFO L225 Difference]: With dead ends: 20558 [2021-04-15 02:22:48,065 INFO L226 Difference]: Without dead ends: 20544 [2021-04-15 02:22:48,065 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 316.9ms TimeCoverageRelationStatistics Valid=384, Invalid=806, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:22:48,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20544 states. [2021-04-15 02:22:48,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20544 to 17922. [2021-04-15 02:22:48,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17922 states, 17921 states have (on average 2.9477707717203283) internal successors, (52827), 17921 states have internal predecessors, (52827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:48,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17922 states to 17922 states and 52827 transitions. [2021-04-15 02:22:48,425 INFO L78 Accepts]: Start accepts. Automaton has 17922 states and 52827 transitions. Word has length 23 [2021-04-15 02:22:48,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:48,425 INFO L480 AbstractCegarLoop]: Abstraction has 17922 states and 52827 transitions. [2021-04-15 02:22:48,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:48,425 INFO L276 IsEmpty]: Start isEmpty. Operand 17922 states and 52827 transitions. [2021-04-15 02:22:48,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:48,445 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:48,445 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:48,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3366,359 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:48,645 INFO L428 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:48,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:48,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1092940890, now seen corresponding path program 358 times [2021-04-15 02:22:48,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:48,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730767942] [2021-04-15 02:22:48,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:48,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:48,785 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:48,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730767942] [2021-04-15 02:22:48,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661033602] [2021-04-15 02:22:48,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:48,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:22:48,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:48,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:48,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:48,966 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:48,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:48,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-04-15 02:22:48,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926039350] [2021-04-15 02:22:48,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:22:48,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:48,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:22:48,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:22:48,967 INFO L87 Difference]: Start difference. First operand 17922 states and 52827 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:49,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:49,493 INFO L93 Difference]: Finished difference Result 19475 states and 56422 transitions. [2021-04-15 02:22:49,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:22:49,494 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:49,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:49,528 INFO L225 Difference]: With dead ends: 19475 [2021-04-15 02:22:49,528 INFO L226 Difference]: Without dead ends: 19459 [2021-04-15 02:22:49,529 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 403.3ms TimeCoverageRelationStatistics Valid=511, Invalid=1049, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 02:22:49,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19459 states. [2021-04-15 02:22:49,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19459 to 17924. [2021-04-15 02:22:49,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17924 states, 17923 states have (on average 2.9474418345143114) internal successors, (52827), 17923 states have internal predecessors, (52827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:49,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17924 states to 17924 states and 52827 transitions. [2021-04-15 02:22:49,819 INFO L78 Accepts]: Start accepts. Automaton has 17924 states and 52827 transitions. Word has length 23 [2021-04-15 02:22:49,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:49,819 INFO L480 AbstractCegarLoop]: Abstraction has 17924 states and 52827 transitions. [2021-04-15 02:22:49,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:49,819 INFO L276 IsEmpty]: Start isEmpty. Operand 17924 states and 52827 transitions. [2021-04-15 02:22:49,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:49,833 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:49,833 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:50,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3367,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:50,034 INFO L428 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:50,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:50,034 INFO L82 PathProgramCache]: Analyzing trace with hash -416621138, now seen corresponding path program 359 times [2021-04-15 02:22:50,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:50,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424218771] [2021-04-15 02:22:50,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:50,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:50,137 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:50,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424218771] [2021-04-15 02:22:50,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669476419] [2021-04-15 02:22:50,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:50,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:22:50,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:50,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:50,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:50,253 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:50,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:50,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 21 [2021-04-15 02:22:50,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749572413] [2021-04-15 02:22:50,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:22:50,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:50,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:22:50,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:22:50,253 INFO L87 Difference]: Start difference. First operand 17924 states and 52827 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:50,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:50,503 INFO L93 Difference]: Finished difference Result 18184 states and 53240 transitions. [2021-04-15 02:22:50,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:22:50,504 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:50,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:50,542 INFO L225 Difference]: With dead ends: 18184 [2021-04-15 02:22:50,542 INFO L226 Difference]: Without dead ends: 18178 [2021-04-15 02:22:50,542 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:22:50,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18178 states. [2021-04-15 02:22:50,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18178 to 17931. [2021-04-15 02:22:50,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17931 states, 17930 states have (on average 2.946793084216397) internal successors, (52836), 17930 states have internal predecessors, (52836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:50,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17931 states to 17931 states and 52836 transitions. [2021-04-15 02:22:50,873 INFO L78 Accepts]: Start accepts. Automaton has 17931 states and 52836 transitions. Word has length 23 [2021-04-15 02:22:50,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:50,873 INFO L480 AbstractCegarLoop]: Abstraction has 17931 states and 52836 transitions. [2021-04-15 02:22:50,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:50,873 INFO L276 IsEmpty]: Start isEmpty. Operand 17931 states and 52836 transitions. [2021-04-15 02:22:50,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:50,894 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:50,894 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:51,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3368,361 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:51,095 INFO L428 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:51,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:51,095 INFO L82 PathProgramCache]: Analyzing trace with hash -2006669488, now seen corresponding path program 360 times [2021-04-15 02:22:51,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:51,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352903878] [2021-04-15 02:22:51,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:51,228 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:51,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352903878] [2021-04-15 02:22:51,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394924955] [2021-04-15 02:22:51,228 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:51,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:22:51,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:51,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:22:51,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:51,324 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:51,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:51,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-04-15 02:22:51,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487088810] [2021-04-15 02:22:51,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:22:51,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:51,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:22:51,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:22:51,325 INFO L87 Difference]: Start difference. First operand 17931 states and 52836 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:51,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:51,691 INFO L93 Difference]: Finished difference Result 18330 states and 53673 transitions. [2021-04-15 02:22:51,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:22:51,692 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:51,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:51,730 INFO L225 Difference]: With dead ends: 18330 [2021-04-15 02:22:51,730 INFO L226 Difference]: Without dead ends: 18316 [2021-04-15 02:22:51,731 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 282.5ms TimeCoverageRelationStatistics Valid=305, Invalid=687, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:22:51,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18316 states. [2021-04-15 02:22:52,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18316 to 17927. [2021-04-15 02:22:52,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17927 states, 17926 states have (on average 2.9460560080330245) internal successors, (52811), 17926 states have internal predecessors, (52811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:52,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17927 states to 17927 states and 52811 transitions. [2021-04-15 02:22:52,082 INFO L78 Accepts]: Start accepts. Automaton has 17927 states and 52811 transitions. Word has length 23 [2021-04-15 02:22:52,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:52,082 INFO L480 AbstractCegarLoop]: Abstraction has 17927 states and 52811 transitions. [2021-04-15 02:22:52,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:52,082 INFO L276 IsEmpty]: Start isEmpty. Operand 17927 states and 52811 transitions. [2021-04-15 02:22:52,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:52,103 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:52,103 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:52,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3369,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:52,304 INFO L428 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:52,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:52,304 INFO L82 PathProgramCache]: Analyzing trace with hash -2053778322, now seen corresponding path program 361 times [2021-04-15 02:22:52,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:52,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801092931] [2021-04-15 02:22:52,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:52,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801092931] [2021-04-15 02:22:52,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548583701] [2021-04-15 02:22:52,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:52,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:52,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:52,499 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:22:52,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:52,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 16 [2021-04-15 02:22:52,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721536681] [2021-04-15 02:22:52,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:22:52,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:52,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:22:52,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:22:52,500 INFO L87 Difference]: Start difference. First operand 17927 states and 52811 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:52,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:52,860 INFO L93 Difference]: Finished difference Result 18362 states and 53572 transitions. [2021-04-15 02:22:52,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:22:52,861 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:52,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:52,899 INFO L225 Difference]: With dead ends: 18362 [2021-04-15 02:22:52,899 INFO L226 Difference]: Without dead ends: 18354 [2021-04-15 02:22:52,899 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 229.7ms TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:22:52,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18354 states. [2021-04-15 02:22:53,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18354 to 17927. [2021-04-15 02:22:53,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17927 states, 17926 states have (on average 2.944828740377106) internal successors, (52789), 17926 states have internal predecessors, (52789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:53,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17927 states to 17927 states and 52789 transitions. [2021-04-15 02:22:53,243 INFO L78 Accepts]: Start accepts. Automaton has 17927 states and 52789 transitions. Word has length 23 [2021-04-15 02:22:53,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:53,243 INFO L480 AbstractCegarLoop]: Abstraction has 17927 states and 52789 transitions. [2021-04-15 02:22:53,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:53,243 INFO L276 IsEmpty]: Start isEmpty. Operand 17927 states and 52789 transitions. [2021-04-15 02:22:53,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:53,263 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:53,263 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:53,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3370 [2021-04-15 02:22:53,464 INFO L428 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:53,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:53,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1798289834, now seen corresponding path program 362 times [2021-04-15 02:22:53,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:53,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236897088] [2021-04-15 02:22:53,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:53,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:53,557 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:53,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236897088] [2021-04-15 02:22:53,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750139240] [2021-04-15 02:22:53,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:53,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:53,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:53,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:53,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:53,635 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:53,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:53,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 17 [2021-04-15 02:22:53,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430138839] [2021-04-15 02:22:53,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:22:53,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:53,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:22:53,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:22:53,636 INFO L87 Difference]: Start difference. First operand 17927 states and 52789 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:53,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:53,945 INFO L93 Difference]: Finished difference Result 18388 states and 53587 transitions. [2021-04-15 02:22:53,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:22:53,946 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:53,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:53,967 INFO L225 Difference]: With dead ends: 18388 [2021-04-15 02:22:53,967 INFO L226 Difference]: Without dead ends: 18378 [2021-04-15 02:22:53,967 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 196.0ms TimeCoverageRelationStatistics Valid=271, Invalid=599, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:22:53,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18378 states. [2021-04-15 02:22:54,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18378 to 17952. [2021-04-15 02:22:54,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17952 states, 17951 states have (on average 2.9439585538410116) internal successors, (52847), 17951 states have internal predecessors, (52847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:54,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17952 states to 17952 states and 52847 transitions. [2021-04-15 02:22:54,279 INFO L78 Accepts]: Start accepts. Automaton has 17952 states and 52847 transitions. Word has length 23 [2021-04-15 02:22:54,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:54,279 INFO L480 AbstractCegarLoop]: Abstraction has 17952 states and 52847 transitions. [2021-04-15 02:22:54,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:54,279 INFO L276 IsEmpty]: Start isEmpty. Operand 17952 states and 52847 transitions. [2021-04-15 02:22:54,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:54,300 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:54,300 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:54,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3371 [2021-04-15 02:22:54,501 INFO L428 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:54,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:54,501 INFO L82 PathProgramCache]: Analyzing trace with hash 953318382, now seen corresponding path program 363 times [2021-04-15 02:22:54,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:54,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342142165] [2021-04-15 02:22:54,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:54,627 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:54,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342142165] [2021-04-15 02:22:54,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847283590] [2021-04-15 02:22:54,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:54,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:22:54,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:54,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:22:54,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:54,719 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:54,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:54,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:22:54,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38821480] [2021-04-15 02:22:54,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:22:54,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:54,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:22:54,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:22:54,720 INFO L87 Difference]: Start difference. First operand 17952 states and 52847 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:55,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:55,134 INFO L93 Difference]: Finished difference Result 20163 states and 58154 transitions. [2021-04-15 02:22:55,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:22:55,135 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:55,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:55,179 INFO L225 Difference]: With dead ends: 20163 [2021-04-15 02:22:55,179 INFO L226 Difference]: Without dead ends: 20151 [2021-04-15 02:22:55,180 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 302.7ms TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:22:55,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20151 states. [2021-04-15 02:22:55,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20151 to 17952. [2021-04-15 02:22:55,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17952 states, 17951 states have (on average 2.9437914322321874) internal successors, (52844), 17951 states have internal predecessors, (52844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:55,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17952 states to 17952 states and 52844 transitions. [2021-04-15 02:22:55,502 INFO L78 Accepts]: Start accepts. Automaton has 17952 states and 52844 transitions. Word has length 23 [2021-04-15 02:22:55,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:55,502 INFO L480 AbstractCegarLoop]: Abstraction has 17952 states and 52844 transitions. [2021-04-15 02:22:55,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:55,503 INFO L276 IsEmpty]: Start isEmpty. Operand 17952 states and 52844 transitions. [2021-04-15 02:22:55,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:55,521 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:55,521 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:55,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3372 [2021-04-15 02:22:55,722 INFO L428 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:55,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:55,722 INFO L82 PathProgramCache]: Analyzing trace with hash 529007146, now seen corresponding path program 364 times [2021-04-15 02:22:55,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:55,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823660691] [2021-04-15 02:22:55,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:55,862 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:55,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823660691] [2021-04-15 02:22:55,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352697572] [2021-04-15 02:22:55,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:55,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:22:55,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:55,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:55,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:55,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:55,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 18 [2021-04-15 02:22:55,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654254662] [2021-04-15 02:22:55,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:22:55,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:55,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:22:55,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:22:55,956 INFO L87 Difference]: Start difference. First operand 17952 states and 52844 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:56,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:56,364 INFO L93 Difference]: Finished difference Result 20184 states and 58174 transitions. [2021-04-15 02:22:56,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:22:56,365 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:56,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:56,407 INFO L225 Difference]: With dead ends: 20184 [2021-04-15 02:22:56,407 INFO L226 Difference]: Without dead ends: 20170 [2021-04-15 02:22:56,407 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 333.3ms TimeCoverageRelationStatistics Valid=368, Invalid=822, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:22:56,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20170 states. [2021-04-15 02:22:56,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20170 to 17968. [2021-04-15 02:22:56,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17968 states, 17967 states have (on average 2.9436745143874883) internal successors, (52889), 17967 states have internal predecessors, (52889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:56,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17968 states to 17968 states and 52889 transitions. [2021-04-15 02:22:56,741 INFO L78 Accepts]: Start accepts. Automaton has 17968 states and 52889 transitions. Word has length 23 [2021-04-15 02:22:56,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:56,741 INFO L480 AbstractCegarLoop]: Abstraction has 17968 states and 52889 transitions. [2021-04-15 02:22:56,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:56,741 INFO L276 IsEmpty]: Start isEmpty. Operand 17968 states and 52889 transitions. [2021-04-15 02:22:56,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:56,762 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:56,762 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:56,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3373 [2021-04-15 02:22:56,963 INFO L428 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:56,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:56,963 INFO L82 PathProgramCache]: Analyzing trace with hash 260260718, now seen corresponding path program 365 times [2021-04-15 02:22:56,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:56,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209357673] [2021-04-15 02:22:56,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:56,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:57,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209357673] [2021-04-15 02:22:57,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130772301] [2021-04-15 02:22:57,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:57,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:22:57,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:57,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:22:57,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:57,209 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:57,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:57,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-04-15 02:22:57,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609874752] [2021-04-15 02:22:57,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:22:57,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:57,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:22:57,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:22:57,210 INFO L87 Difference]: Start difference. First operand 17968 states and 52889 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:57,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:57,641 INFO L93 Difference]: Finished difference Result 19526 states and 56440 transitions. [2021-04-15 02:22:57,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:22:57,641 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:57,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:57,666 INFO L225 Difference]: With dead ends: 19526 [2021-04-15 02:22:57,666 INFO L226 Difference]: Without dead ends: 19510 [2021-04-15 02:22:57,666 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 375.8ms TimeCoverageRelationStatistics Valid=488, Invalid=1072, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 02:22:57,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19510 states. [2021-04-15 02:22:57,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19510 to 17968. [2021-04-15 02:22:57,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17968 states, 17967 states have (on average 2.9435631991985307) internal successors, (52887), 17967 states have internal predecessors, (52887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:57,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17968 states to 17968 states and 52887 transitions. [2021-04-15 02:22:57,916 INFO L78 Accepts]: Start accepts. Automaton has 17968 states and 52887 transitions. Word has length 23 [2021-04-15 02:22:57,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:57,916 INFO L480 AbstractCegarLoop]: Abstraction has 17968 states and 52887 transitions. [2021-04-15 02:22:57,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:57,916 INFO L276 IsEmpty]: Start isEmpty. Operand 17968 states and 52887 transitions. [2021-04-15 02:22:57,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:57,930 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:57,930 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:58,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3374 [2021-04-15 02:22:58,130 INFO L428 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:58,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:58,130 INFO L82 PathProgramCache]: Analyzing trace with hash -333235662, now seen corresponding path program 366 times [2021-04-15 02:22:58,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:58,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621405025] [2021-04-15 02:22:58,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:58,254 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:58,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621405025] [2021-04-15 02:22:58,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468206458] [2021-04-15 02:22:58,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:58,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-04-15 02:22:58,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:58,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:22:58,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:58,347 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:58,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:58,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-04-15 02:22:58,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434794292] [2021-04-15 02:22:58,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:22:58,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:58,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:22:58,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:22:58,348 INFO L87 Difference]: Start difference. First operand 17968 states and 52887 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:58,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:58,633 INFO L93 Difference]: Finished difference Result 18372 states and 53657 transitions. [2021-04-15 02:22:58,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:22:58,634 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:58,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:58,667 INFO L225 Difference]: With dead ends: 18372 [2021-04-15 02:22:58,667 INFO L226 Difference]: Without dead ends: 18368 [2021-04-15 02:22:58,667 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 199.1ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:22:58,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18368 states. [2021-04-15 02:22:58,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18368 to 18048. [2021-04-15 02:22:59,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18048 states, 18047 states have (on average 2.9450878262315068) internal successors, (53150), 18047 states have internal predecessors, (53150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:59,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18048 states to 18048 states and 53150 transitions. [2021-04-15 02:22:59,051 INFO L78 Accepts]: Start accepts. Automaton has 18048 states and 53150 transitions. Word has length 23 [2021-04-15 02:22:59,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:59,051 INFO L480 AbstractCegarLoop]: Abstraction has 18048 states and 53150 transitions. [2021-04-15 02:22:59,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:59,051 INFO L276 IsEmpty]: Start isEmpty. Operand 18048 states and 53150 transitions. [2021-04-15 02:22:59,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:22:59,072 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:59,073 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:59,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3375 [2021-04-15 02:22:59,273 INFO L428 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:59,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:59,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1411119828, now seen corresponding path program 367 times [2021-04-15 02:22:59,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:59,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335166261] [2021-04-15 02:22:59,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:59,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:59,397 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:59,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335166261] [2021-04-15 02:22:59,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382701716] [2021-04-15 02:22:59,398 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:59,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:59,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:59,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:22:59,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:59,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-04-15 02:22:59,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928778040] [2021-04-15 02:22:59,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:22:59,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:59,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:22:59,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:22:59,502 INFO L87 Difference]: Start difference. First operand 18048 states and 53150 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:59,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:59,846 INFO L93 Difference]: Finished difference Result 19818 states and 57386 transitions. [2021-04-15 02:22:59,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:22:59,847 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:22:59,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:59,888 INFO L225 Difference]: With dead ends: 19818 [2021-04-15 02:22:59,889 INFO L226 Difference]: Without dead ends: 19806 [2021-04-15 02:22:59,889 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 270.8ms TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:22:59,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19806 states. [2021-04-15 02:23:00,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19806 to 18048. [2021-04-15 02:23:00,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18048 states, 18047 states have (on average 2.9444228957721506) internal successors, (53138), 18047 states have internal predecessors, (53138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:00,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18048 states to 18048 states and 53138 transitions. [2021-04-15 02:23:00,253 INFO L78 Accepts]: Start accepts. Automaton has 18048 states and 53138 transitions. Word has length 23 [2021-04-15 02:23:00,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:00,253 INFO L480 AbstractCegarLoop]: Abstraction has 18048 states and 53138 transitions. [2021-04-15 02:23:00,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:00,253 INFO L276 IsEmpty]: Start isEmpty. Operand 18048 states and 53138 transitions. [2021-04-15 02:23:00,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:23:00,275 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:00,275 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:00,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3376,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:00,475 INFO L428 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:00,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:00,475 INFO L82 PathProgramCache]: Analyzing trace with hash 986808592, now seen corresponding path program 368 times [2021-04-15 02:23:00,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:00,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167278507] [2021-04-15 02:23:00,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:00,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:00,616 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:00,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167278507] [2021-04-15 02:23:00,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824125421] [2021-04-15 02:23:00,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:00,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:23:00,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:00,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:00,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:00,724 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:00,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:00,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 19 [2021-04-15 02:23:00,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283829456] [2021-04-15 02:23:00,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 02:23:00,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:00,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 02:23:00,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:23:00,725 INFO L87 Difference]: Start difference. First operand 18048 states and 53138 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:01,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:01,108 INFO L93 Difference]: Finished difference Result 19833 states and 57393 transitions. [2021-04-15 02:23:01,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:23:01,109 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:23:01,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:01,143 INFO L225 Difference]: With dead ends: 19833 [2021-04-15 02:23:01,144 INFO L226 Difference]: Without dead ends: 19819 [2021-04-15 02:23:01,144 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 307.9ms TimeCoverageRelationStatistics Valid=314, Invalid=742, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:23:01,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19819 states. [2021-04-15 02:23:01,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19819 to 18069. [2021-04-15 02:23:01,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18069 states, 18068 states have (on average 2.9438786805401818) internal successors, (53190), 18068 states have internal predecessors, (53190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:01,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18069 states to 18069 states and 53190 transitions. [2021-04-15 02:23:01,449 INFO L78 Accepts]: Start accepts. Automaton has 18069 states and 53190 transitions. Word has length 23 [2021-04-15 02:23:01,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:01,449 INFO L480 AbstractCegarLoop]: Abstraction has 18069 states and 53190 transitions. [2021-04-15 02:23:01,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:01,450 INFO L276 IsEmpty]: Start isEmpty. Operand 18069 states and 53190 transitions. [2021-04-15 02:23:01,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:23:01,464 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:01,464 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:01,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3377,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:01,665 INFO L428 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:01,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:01,665 INFO L82 PathProgramCache]: Analyzing trace with hash 718062164, now seen corresponding path program 369 times [2021-04-15 02:23:01,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:01,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655307339] [2021-04-15 02:23:01,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:01,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:01,783 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:01,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655307339] [2021-04-15 02:23:01,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80499343] [2021-04-15 02:23:01,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:01,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:23:01,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:01,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:23:01,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:01,881 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:01,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:01,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-04-15 02:23:01,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830153044] [2021-04-15 02:23:01,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 02:23:01,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:01,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 02:23:01,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:23:01,882 INFO L87 Difference]: Start difference. First operand 18069 states and 53190 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:02,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:02,287 INFO L93 Difference]: Finished difference Result 19689 states and 56930 transitions. [2021-04-15 02:23:02,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:23:02,288 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:23:02,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:02,330 INFO L225 Difference]: With dead ends: 19689 [2021-04-15 02:23:02,330 INFO L226 Difference]: Without dead ends: 19673 [2021-04-15 02:23:02,331 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 325.8ms TimeCoverageRelationStatistics Valid=418, Invalid=988, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 02:23:02,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19673 states. [2021-04-15 02:23:02,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19673 to 18069. [2021-04-15 02:23:02,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18069 states, 18068 states have (on average 2.943767987602391) internal successors, (53188), 18068 states have internal predecessors, (53188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:02,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18069 states to 18069 states and 53188 transitions. [2021-04-15 02:23:02,672 INFO L78 Accepts]: Start accepts. Automaton has 18069 states and 53188 transitions. Word has length 23 [2021-04-15 02:23:02,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:02,672 INFO L480 AbstractCegarLoop]: Abstraction has 18069 states and 53188 transitions. [2021-04-15 02:23:02,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:02,672 INFO L276 IsEmpty]: Start isEmpty. Operand 18069 states and 53188 transitions. [2021-04-15 02:23:02,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:23:02,694 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:02,694 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:02,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3378 [2021-04-15 02:23:02,895 INFO L428 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:02,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:02,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1747664174, now seen corresponding path program 370 times [2021-04-15 02:23:02,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:02,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265767127] [2021-04-15 02:23:02,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:02,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:03,024 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:03,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265767127] [2021-04-15 02:23:03,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106116632] [2021-04-15 02:23:03,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:03,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:23:03,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:03,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:23:03,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:03,120 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:03,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:03,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 17 [2021-04-15 02:23:03,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3250990] [2021-04-15 02:23:03,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:23:03,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:03,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:23:03,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:23:03,121 INFO L87 Difference]: Start difference. First operand 18069 states and 53188 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:03,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:03,376 INFO L93 Difference]: Finished difference Result 18782 states and 54828 transitions. [2021-04-15 02:23:03,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:23:03,378 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:23:03,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:03,424 INFO L225 Difference]: With dead ends: 18782 [2021-04-15 02:23:03,424 INFO L226 Difference]: Without dead ends: 18782 [2021-04-15 02:23:03,424 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 175.4ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:23:03,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18782 states. [2021-04-15 02:23:03,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18782 to 18363. [2021-04-15 02:23:03,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18363 states, 18362 states have (on average 2.9503866681189415) internal successors, (54175), 18362 states have internal predecessors, (54175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:03,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18363 states to 18363 states and 54175 transitions. [2021-04-15 02:23:03,845 INFO L78 Accepts]: Start accepts. Automaton has 18363 states and 54175 transitions. Word has length 23 [2021-04-15 02:23:03,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:03,845 INFO L480 AbstractCegarLoop]: Abstraction has 18363 states and 54175 transitions. [2021-04-15 02:23:03,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:03,845 INFO L276 IsEmpty]: Start isEmpty. Operand 18363 states and 54175 transitions. [2021-04-15 02:23:03,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:23:03,868 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:03,868 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:04,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3379,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:04,068 INFO L428 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:04,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:04,069 INFO L82 PathProgramCache]: Analyzing trace with hash -2038116690, now seen corresponding path program 371 times [2021-04-15 02:23:04,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:04,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908043537] [2021-04-15 02:23:04,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:04,216 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:04,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908043537] [2021-04-15 02:23:04,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474281827] [2021-04-15 02:23:04,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:04,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:23:04,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:04,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:23:04,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:04,348 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:04,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:04,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 20 [2021-04-15 02:23:04,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383088155] [2021-04-15 02:23:04,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 02:23:04,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:04,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 02:23:04,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:23:04,349 INFO L87 Difference]: Start difference. First operand 18363 states and 54175 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:04,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:04,745 INFO L93 Difference]: Finished difference Result 20117 states and 58445 transitions. [2021-04-15 02:23:04,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:23:04,745 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:23:04,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:04,787 INFO L225 Difference]: With dead ends: 20117 [2021-04-15 02:23:04,787 INFO L226 Difference]: Without dead ends: 20101 [2021-04-15 02:23:04,788 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 349.0ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 02:23:04,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20101 states. [2021-04-15 02:23:05,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20101 to 18363. [2021-04-15 02:23:05,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18363 states, 18362 states have (on average 2.9502777475220565) internal successors, (54173), 18362 states have internal predecessors, (54173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:05,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18363 states to 18363 states and 54173 transitions. [2021-04-15 02:23:05,124 INFO L78 Accepts]: Start accepts. Automaton has 18363 states and 54173 transitions. Word has length 23 [2021-04-15 02:23:05,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:05,124 INFO L480 AbstractCegarLoop]: Abstraction has 18363 states and 54173 transitions. [2021-04-15 02:23:05,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:05,124 INFO L276 IsEmpty]: Start isEmpty. Operand 18363 states and 54173 transitions. [2021-04-15 02:23:05,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:23:05,146 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:05,146 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:05,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3380 [2021-04-15 02:23:05,347 INFO L428 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:05,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:05,347 INFO L82 PathProgramCache]: Analyzing trace with hash 567863986, now seen corresponding path program 372 times [2021-04-15 02:23:05,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:05,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215078144] [2021-04-15 02:23:05,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:05,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:05,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215078144] [2021-04-15 02:23:05,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617560901] [2021-04-15 02:23:05,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:05,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:23:05,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:05,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:23:05,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:05,572 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:05,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:05,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 17 [2021-04-15 02:23:05,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860095882] [2021-04-15 02:23:05,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:23:05,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:05,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:23:05,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:23:05,572 INFO L87 Difference]: Start difference. First operand 18363 states and 54173 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:05,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:05,720 INFO L93 Difference]: Finished difference Result 21290 states and 62446 transitions. [2021-04-15 02:23:05,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:23:05,721 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:23:05,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:05,750 INFO L225 Difference]: With dead ends: 21290 [2021-04-15 02:23:05,750 INFO L226 Difference]: Without dead ends: 21290 [2021-04-15 02:23:05,750 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 141.3ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:23:05,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21290 states. [2021-04-15 02:23:06,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21290 to 20833. [2021-04-15 02:23:06,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20833 states, 20832 states have (on average 2.9642857142857144) internal successors, (61752), 20832 states have internal predecessors, (61752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:06,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20833 states to 20833 states and 61752 transitions. [2021-04-15 02:23:06,074 INFO L78 Accepts]: Start accepts. Automaton has 20833 states and 61752 transitions. Word has length 23 [2021-04-15 02:23:06,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:06,074 INFO L480 AbstractCegarLoop]: Abstraction has 20833 states and 61752 transitions. [2021-04-15 02:23:06,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:06,074 INFO L276 IsEmpty]: Start isEmpty. Operand 20833 states and 61752 transitions. [2021-04-15 02:23:06,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:23:06,092 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:06,092 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:06,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3381 [2021-04-15 02:23:06,292 INFO L428 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:06,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:06,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1981648620, now seen corresponding path program 373 times [2021-04-15 02:23:06,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:06,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322250098] [2021-04-15 02:23:06,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:06,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:06,428 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:06,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322250098] [2021-04-15 02:23:06,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236330543] [2021-04-15 02:23:06,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:06,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:06,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:06,521 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 54 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:06,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:06,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 18 [2021-04-15 02:23:06,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376730232] [2021-04-15 02:23:06,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:23:06,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:06,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:23:06,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:23:06,522 INFO L87 Difference]: Start difference. First operand 20833 states and 61752 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:06,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:06,717 INFO L93 Difference]: Finished difference Result 21205 states and 62266 transitions. [2021-04-15 02:23:06,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:23:06,718 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:23:06,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:06,763 INFO L225 Difference]: With dead ends: 21205 [2021-04-15 02:23:06,763 INFO L226 Difference]: Without dead ends: 21205 [2021-04-15 02:23:06,763 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 151.2ms TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:23:06,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21205 states. [2021-04-15 02:23:07,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21205 to 20832. [2021-04-15 02:23:07,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20832 states, 20831 states have (on average 2.964187989054774) internal successors, (61747), 20831 states have internal predecessors, (61747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:07,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20832 states to 20832 states and 61747 transitions. [2021-04-15 02:23:07,167 INFO L78 Accepts]: Start accepts. Automaton has 20832 states and 61747 transitions. Word has length 23 [2021-04-15 02:23:07,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:07,167 INFO L480 AbstractCegarLoop]: Abstraction has 20832 states and 61747 transitions. [2021-04-15 02:23:07,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:07,168 INFO L276 IsEmpty]: Start isEmpty. Operand 20832 states and 61747 transitions. [2021-04-15 02:23:07,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:23:07,192 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:07,192 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:07,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3382,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:07,393 INFO L428 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:07,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:07,393 INFO L82 PathProgramCache]: Analyzing trace with hash -271035312, now seen corresponding path program 374 times [2021-04-15 02:23:07,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:07,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227389610] [2021-04-15 02:23:07,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:07,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:07,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227389610] [2021-04-15 02:23:07,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681776082] [2021-04-15 02:23:07,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:07,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:23:07,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:07,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:07,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 49 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:23:07,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:07,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 17 [2021-04-15 02:23:07,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354870031] [2021-04-15 02:23:07,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:23:07,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:07,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:23:07,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:23:07,615 INFO L87 Difference]: Start difference. First operand 20832 states and 61747 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:07,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:07,944 INFO L93 Difference]: Finished difference Result 21228 states and 62300 transitions. [2021-04-15 02:23:07,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:23:07,945 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:23:07,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:07,987 INFO L225 Difference]: With dead ends: 21228 [2021-04-15 02:23:07,987 INFO L226 Difference]: Without dead ends: 21226 [2021-04-15 02:23:07,988 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 243.3ms TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:23:08,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21226 states. [2021-04-15 02:23:08,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21226 to 20832. [2021-04-15 02:23:08,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20832 states, 20831 states have (on average 2.96409197830157) internal successors, (61745), 20831 states have internal predecessors, (61745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:08,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20832 states to 20832 states and 61745 transitions. [2021-04-15 02:23:08,440 INFO L78 Accepts]: Start accepts. Automaton has 20832 states and 61745 transitions. Word has length 23 [2021-04-15 02:23:08,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:08,440 INFO L480 AbstractCegarLoop]: Abstraction has 20832 states and 61745 transitions. [2021-04-15 02:23:08,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:08,441 INFO L276 IsEmpty]: Start isEmpty. Operand 20832 states and 61745 transitions. [2021-04-15 02:23:08,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:23:08,465 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:08,465 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:08,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3383 [2021-04-15 02:23:08,665 INFO L428 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:08,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:08,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1218369684, now seen corresponding path program 375 times [2021-04-15 02:23:08,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:08,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897974418] [2021-04-15 02:23:08,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:08,797 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:08,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897974418] [2021-04-15 02:23:08,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459307881] [2021-04-15 02:23:08,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:08,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:23:08,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:08,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:23:08,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:08,898 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 37 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:08,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:08,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 18 [2021-04-15 02:23:08,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535925260] [2021-04-15 02:23:08,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:23:08,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:08,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:23:08,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:23:08,899 INFO L87 Difference]: Start difference. First operand 20832 states and 61745 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:09,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:09,250 INFO L93 Difference]: Finished difference Result 21234 states and 62306 transitions. [2021-04-15 02:23:09,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:23:09,251 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:23:09,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:09,291 INFO L225 Difference]: With dead ends: 21234 [2021-04-15 02:23:09,292 INFO L226 Difference]: Without dead ends: 21230 [2021-04-15 02:23:09,292 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 263.7ms TimeCoverageRelationStatistics Valid=239, Invalid=573, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:23:09,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21230 states. [2021-04-15 02:23:09,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21230 to 20841. [2021-04-15 02:23:09,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20841 states, 20840 states have (on average 2.964299424184261) internal successors, (61776), 20840 states have internal predecessors, (61776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:09,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20841 states to 20841 states and 61776 transitions. [2021-04-15 02:23:09,687 INFO L78 Accepts]: Start accepts. Automaton has 20841 states and 61776 transitions. Word has length 23 [2021-04-15 02:23:09,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:09,687 INFO L480 AbstractCegarLoop]: Abstraction has 20841 states and 61776 transitions. [2021-04-15 02:23:09,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:09,687 INFO L276 IsEmpty]: Start isEmpty. Operand 20841 states and 61776 transitions. [2021-04-15 02:23:09,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:23:09,711 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:09,711 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:09,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3384 [2021-04-15 02:23:09,911 INFO L428 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:09,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:09,912 INFO L82 PathProgramCache]: Analyzing trace with hash 145284304, now seen corresponding path program 376 times [2021-04-15 02:23:09,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:09,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845337696] [2021-04-15 02:23:09,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:10,019 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:10,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845337696] [2021-04-15 02:23:10,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183142436] [2021-04-15 02:23:10,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:10,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:23:10,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:10,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:10,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:10,102 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:23:10,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:10,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 18 [2021-04-15 02:23:10,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174571891] [2021-04-15 02:23:10,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:23:10,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:10,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:23:10,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:23:10,103 INFO L87 Difference]: Start difference. First operand 20841 states and 61776 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:10,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:10,375 INFO L93 Difference]: Finished difference Result 25243 states and 73892 transitions. [2021-04-15 02:23:10,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:23:10,376 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:23:10,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:10,407 INFO L225 Difference]: With dead ends: 25243 [2021-04-15 02:23:10,407 INFO L226 Difference]: Without dead ends: 25237 [2021-04-15 02:23:10,408 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 204.3ms TimeCoverageRelationStatistics Valid=233, Invalid=579, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:23:10,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25237 states. [2021-04-15 02:23:10,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25237 to 20841. [2021-04-15 02:23:10,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20841 states, 20840 states have (on average 2.964011516314779) internal successors, (61770), 20840 states have internal predecessors, (61770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:10,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20841 states to 20841 states and 61770 transitions. [2021-04-15 02:23:10,792 INFO L78 Accepts]: Start accepts. Automaton has 20841 states and 61770 transitions. Word has length 23 [2021-04-15 02:23:10,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:10,792 INFO L480 AbstractCegarLoop]: Abstraction has 20841 states and 61770 transitions. [2021-04-15 02:23:10,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:10,793 INFO L276 IsEmpty]: Start isEmpty. Operand 20841 states and 61770 transitions. [2021-04-15 02:23:10,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:23:10,818 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:10,818 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:11,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3385 [2021-04-15 02:23:11,018 INFO L428 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:11,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:11,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1239375892, now seen corresponding path program 377 times [2021-04-15 02:23:11,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:11,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826530279] [2021-04-15 02:23:11,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:11,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826530279] [2021-04-15 02:23:11,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504572317] [2021-04-15 02:23:11,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:11,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:23:11,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:11,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:11,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:11,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:11,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 19 [2021-04-15 02:23:11,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844656142] [2021-04-15 02:23:11,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 02:23:11,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:11,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 02:23:11,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:23:11,270 INFO L87 Difference]: Start difference. First operand 20841 states and 61770 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:11,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:11,669 INFO L93 Difference]: Finished difference Result 25260 states and 73908 transitions. [2021-04-15 02:23:11,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:23:11,670 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:23:11,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:11,727 INFO L225 Difference]: With dead ends: 25260 [2021-04-15 02:23:11,727 INFO L226 Difference]: Without dead ends: 25252 [2021-04-15 02:23:11,728 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 289.7ms TimeCoverageRelationStatistics Valid=263, Invalid=667, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:23:11,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25252 states. [2021-04-15 02:23:12,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25252 to 20870. [2021-04-15 02:23:12,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20870 states, 20869 states have (on average 2.9636302649863433) internal successors, (61848), 20869 states have internal predecessors, (61848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:12,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20870 states to 20870 states and 61848 transitions. [2021-04-15 02:23:12,180 INFO L78 Accepts]: Start accepts. Automaton has 20870 states and 61848 transitions. Word has length 23 [2021-04-15 02:23:12,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:12,180 INFO L480 AbstractCegarLoop]: Abstraction has 20870 states and 61848 transitions. [2021-04-15 02:23:12,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:12,180 INFO L276 IsEmpty]: Start isEmpty. Operand 20870 states and 61848 transitions. [2021-04-15 02:23:12,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:23:12,205 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:12,205 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:12,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 379 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3386 [2021-04-15 02:23:12,406 INFO L428 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:12,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:12,406 INFO L82 PathProgramCache]: Analyzing trace with hash 796476752, now seen corresponding path program 378 times [2021-04-15 02:23:12,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:12,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949046300] [2021-04-15 02:23:12,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:12,547 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:12,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949046300] [2021-04-15 02:23:12,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496601807] [2021-04-15 02:23:12,547 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:12,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:23:12,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:12,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:23:12,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:12,663 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:12,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:12,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 19 [2021-04-15 02:23:12,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183178830] [2021-04-15 02:23:12,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 02:23:12,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:12,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 02:23:12,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:23:12,664 INFO L87 Difference]: Start difference. First operand 20870 states and 61848 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:13,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:13,047 INFO L93 Difference]: Finished difference Result 24954 states and 72952 transitions. [2021-04-15 02:23:13,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:23:13,048 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:23:13,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:13,106 INFO L225 Difference]: With dead ends: 24954 [2021-04-15 02:23:13,106 INFO L226 Difference]: Without dead ends: 24944 [2021-04-15 02:23:13,106 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 300.4ms TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:23:13,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24944 states. [2021-04-15 02:23:13,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24944 to 20870. [2021-04-15 02:23:13,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20870 states, 20869 states have (on average 2.963342757199674) internal successors, (61842), 20869 states have internal predecessors, (61842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:13,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20870 states to 20870 states and 61842 transitions. [2021-04-15 02:23:13,520 INFO L78 Accepts]: Start accepts. Automaton has 20870 states and 61842 transitions. Word has length 23 [2021-04-15 02:23:13,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:13,521 INFO L480 AbstractCegarLoop]: Abstraction has 20870 states and 61842 transitions. [2021-04-15 02:23:13,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:13,521 INFO L276 IsEmpty]: Start isEmpty. Operand 20870 states and 61842 transitions. [2021-04-15 02:23:13,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:23:13,537 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:13,537 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:13,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3387,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:13,741 INFO L428 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:13,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:13,741 INFO L82 PathProgramCache]: Analyzing trace with hash -48494700, now seen corresponding path program 379 times [2021-04-15 02:23:13,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:13,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127034719] [2021-04-15 02:23:13,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:13,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:13,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127034719] [2021-04-15 02:23:13,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167200896] [2021-04-15 02:23:13,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:13,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:13,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:13,962 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 37 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:13,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:13,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 20 [2021-04-15 02:23:13,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061693564] [2021-04-15 02:23:13,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 02:23:13,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:13,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 02:23:13,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:23:13,963 INFO L87 Difference]: Start difference. First operand 20870 states and 61842 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:14,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:14,347 INFO L93 Difference]: Finished difference Result 24983 states and 72980 transitions. [2021-04-15 02:23:14,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:23:14,348 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:23:14,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:14,406 INFO L225 Difference]: With dead ends: 24983 [2021-04-15 02:23:14,407 INFO L226 Difference]: Without dead ends: 24971 [2021-04-15 02:23:14,407 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 280.6ms TimeCoverageRelationStatistics Valid=293, Invalid=763, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:23:14,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24971 states. [2021-04-15 02:23:14,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24971 to 20967. [2021-04-15 02:23:14,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20967 states, 20966 states have (on average 2.963130783172756) internal successors, (62125), 20966 states have internal predecessors, (62125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:14,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20967 states to 20967 states and 62125 transitions. [2021-04-15 02:23:14,850 INFO L78 Accepts]: Start accepts. Automaton has 20967 states and 62125 transitions. Word has length 23 [2021-04-15 02:23:14,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:14,850 INFO L480 AbstractCegarLoop]: Abstraction has 20967 states and 62125 transitions. [2021-04-15 02:23:14,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:14,851 INFO L276 IsEmpty]: Start isEmpty. Operand 20967 states and 62125 transitions. [2021-04-15 02:23:14,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:23:14,877 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:14,877 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:15,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3388,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:15,078 INFO L428 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:15,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:15,081 INFO L82 PathProgramCache]: Analyzing trace with hash -472805936, now seen corresponding path program 380 times [2021-04-15 02:23:15,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:15,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031533150] [2021-04-15 02:23:15,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:15,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:15,278 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:15,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031533150] [2021-04-15 02:23:15,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642045411] [2021-04-15 02:23:15,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:15,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:23:15,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:15,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:15,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:15,410 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:23:15,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:15,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 20 [2021-04-15 02:23:15,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023715125] [2021-04-15 02:23:15,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 02:23:15,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:15,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 02:23:15,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:23:15,411 INFO L87 Difference]: Start difference. First operand 20967 states and 62125 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:15,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:15,812 INFO L93 Difference]: Finished difference Result 23366 states and 68426 transitions. [2021-04-15 02:23:15,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:23:15,813 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:23:15,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:15,863 INFO L225 Difference]: With dead ends: 23366 [2021-04-15 02:23:15,864 INFO L226 Difference]: Without dead ends: 23352 [2021-04-15 02:23:15,864 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 384.5ms TimeCoverageRelationStatistics Valid=291, Invalid=765, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:23:15,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23352 states. [2021-04-15 02:23:16,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23352 to 20967. [2021-04-15 02:23:16,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20967 states, 20966 states have (on average 2.9630353906324527) internal successors, (62123), 20966 states have internal predecessors, (62123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:16,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20967 states to 20967 states and 62123 transitions. [2021-04-15 02:23:16,283 INFO L78 Accepts]: Start accepts. Automaton has 20967 states and 62123 transitions. Word has length 23 [2021-04-15 02:23:16,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:16,283 INFO L480 AbstractCegarLoop]: Abstraction has 20967 states and 62123 transitions. [2021-04-15 02:23:16,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:16,283 INFO L276 IsEmpty]: Start isEmpty. Operand 20967 states and 62123 transitions. [2021-04-15 02:23:16,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:23:16,309 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:16,309 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:16,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3389,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:16,510 INFO L428 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:16,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:16,510 INFO L82 PathProgramCache]: Analyzing trace with hash -741552364, now seen corresponding path program 381 times [2021-04-15 02:23:16,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:16,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021959382] [2021-04-15 02:23:16,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:16,664 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:16,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021959382] [2021-04-15 02:23:16,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989730645] [2021-04-15 02:23:16,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:16,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:23:16,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:16,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:23:16,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:16,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:16,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 21 [2021-04-15 02:23:16,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596669297] [2021-04-15 02:23:16,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:23:16,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:16,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:23:16,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:23:16,818 INFO L87 Difference]: Start difference. First operand 20967 states and 62123 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:17,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:17,189 INFO L93 Difference]: Finished difference Result 23400 states and 68462 transitions. [2021-04-15 02:23:17,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:23:17,190 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:23:17,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:17,220 INFO L225 Difference]: With dead ends: 23400 [2021-04-15 02:23:17,220 INFO L226 Difference]: Without dead ends: 23384 [2021-04-15 02:23:17,220 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 356.3ms TimeCoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:23:17,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23384 states. [2021-04-15 02:23:17,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23384 to 20978. [2021-04-15 02:23:17,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20978 states, 20977 states have (on average 2.9629594317585926) internal successors, (62154), 20977 states have internal predecessors, (62154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:17,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20978 states to 20978 states and 62154 transitions. [2021-04-15 02:23:17,648 INFO L78 Accepts]: Start accepts. Automaton has 20978 states and 62154 transitions. Word has length 23 [2021-04-15 02:23:17,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:17,648 INFO L480 AbstractCegarLoop]: Abstraction has 20978 states and 62154 transitions. [2021-04-15 02:23:17,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:17,648 INFO L276 IsEmpty]: Start isEmpty. Operand 20978 states and 62154 transitions. [2021-04-15 02:23:17,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:23:17,664 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:17,664 INFO L551 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:17,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3390 [2021-04-15 02:23:17,864 INFO L428 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:17,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:17,865 INFO L82 PathProgramCache]: Analyzing trace with hash -482757040, now seen corresponding path program 382 times [2021-04-15 02:23:17,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:17,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509031500] [2021-04-15 02:23:17,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:18,028 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:18,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509031500] [2021-04-15 02:23:18,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358978932] [2021-04-15 02:23:18,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:18,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:23:18,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:18,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:18,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 54 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:18,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:18,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-04-15 02:23:18,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593148108] [2021-04-15 02:23:18,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:23:18,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:18,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:23:18,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:23:18,202 INFO L87 Difference]: Start difference. First operand 20978 states and 62154 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:18,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:18,590 INFO L93 Difference]: Finished difference Result 21340 states and 63016 transitions. [2021-04-15 02:23:18,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:23:18,591 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 02:23:18,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:18,637 INFO L225 Difference]: With dead ends: 21340 [2021-04-15 02:23:18,637 INFO L226 Difference]: Without dead ends: 21331 [2021-04-15 02:23:18,637 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 427.0ms TimeCoverageRelationStatistics Valid=322, Invalid=938, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 02:23:18,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21331 states. [2021-04-15 02:23:18,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21331 to 20978. [2021-04-15 02:23:18,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20978 states, 20977 states have (on average 2.962911760499595) internal successors, (62153), 20977 states have internal predecessors, (62153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:19,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20978 states to 20978 states and 62153 transitions. [2021-04-15 02:23:19,018 INFO L78 Accepts]: Start accepts. Automaton has 20978 states and 62153 transitions. Word has length 23 [2021-04-15 02:23:19,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:19,018 INFO L480 AbstractCegarLoop]: Abstraction has 20978 states and 62153 transitions. [2021-04-15 02:23:19,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:19,018 INFO L276 IsEmpty]: Start isEmpty. Operand 20978 states and 62153 transitions. [2021-04-15 02:23:19,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:23:19,044 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:19,044 INFO L551 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:19,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3391,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:19,245 INFO L428 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:19,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:19,245 INFO L82 PathProgramCache]: Analyzing trace with hash 782455791, now seen corresponding path program 383 times [2021-04-15 02:23:19,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:19,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73881659] [2021-04-15 02:23:19,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:19,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:19,347 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:19,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73881659] [2021-04-15 02:23:19,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708615481] [2021-04-15 02:23:19,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:19,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:23:19,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:19,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-04-15 02:23:19,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:20,026 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-04-15 02:23:20,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:23:20,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-04-15 02:23:21,221 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-04-15 02:23:21,907 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 1067 DAG size of output: 1457 [2021-04-15 02:23:27,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:23:27,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:23:27,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:23:27,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-04-15 02:23:27,050 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:27,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:27,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-04-15 02:23:27,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180330752] [2021-04-15 02:23:27,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:23:27,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:27,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:23:27,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:23:27,051 INFO L87 Difference]: Start difference. First operand 20978 states and 62153 transitions. Second operand has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:27,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:27,721 INFO L93 Difference]: Finished difference Result 21192 states and 62579 transitions. [2021-04-15 02:23:27,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:23:27,722 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 02:23:27,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:27,765 INFO L225 Difference]: With dead ends: 21192 [2021-04-15 02:23:27,765 INFO L226 Difference]: Without dead ends: 21189 [2021-04-15 02:23:27,766 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 423.1ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:23:27,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21189 states. [2021-04-15 02:23:28,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21189 to 21059. [2021-04-15 02:23:28,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21059 states, 21058 states have (on average 2.9629119574508502) internal successors, (62393), 21058 states have internal predecessors, (62393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:28,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21059 states to 21059 states and 62393 transitions. [2021-04-15 02:23:28,152 INFO L78 Accepts]: Start accepts. Automaton has 21059 states and 62393 transitions. Word has length 24 [2021-04-15 02:23:28,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:28,152 INFO L480 AbstractCegarLoop]: Abstraction has 21059 states and 62393 transitions. [2021-04-15 02:23:28,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:28,152 INFO L276 IsEmpty]: Start isEmpty. Operand 21059 states and 62393 transitions. [2021-04-15 02:23:28,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:23:28,174 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:28,174 INFO L551 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:28,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3392,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:28,374 INFO L428 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:28,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:28,375 INFO L82 PathProgramCache]: Analyzing trace with hash -840131025, now seen corresponding path program 384 times [2021-04-15 02:23:28,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:28,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754934720] [2021-04-15 02:23:28,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:28,452 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:28,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754934720] [2021-04-15 02:23:28,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986484959] [2021-04-15 02:23:28,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:28,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:23:28,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:28,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-04-15 02:23:28,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:28,988 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-04-15 02:23:28,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:23:28,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-04-15 02:23:33,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:23:33,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:23:33,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:23:33,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-04-15 02:23:33,492 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:33,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:33,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-04-15 02:23:33,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419241573] [2021-04-15 02:23:33,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:23:33,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:33,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:23:33,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:23:33,493 INFO L87 Difference]: Start difference. First operand 21059 states and 62393 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:33,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:33,951 INFO L93 Difference]: Finished difference Result 21285 states and 62822 transitions. [2021-04-15 02:23:33,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:23:33,952 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 02:23:33,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:33,998 INFO L225 Difference]: With dead ends: 21285 [2021-04-15 02:23:33,998 INFO L226 Difference]: Without dead ends: 21282 [2021-04-15 02:23:33,998 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 331.0ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:23:34,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21282 states. [2021-04-15 02:23:34,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21282 to 21109. [2021-04-15 02:23:34,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21109 states, 21108 states have (on average 2.9639946939548985) internal successors, (62564), 21108 states have internal predecessors, (62564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:34,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21109 states to 21109 states and 62564 transitions. [2021-04-15 02:23:34,398 INFO L78 Accepts]: Start accepts. Automaton has 21109 states and 62564 transitions. Word has length 24 [2021-04-15 02:23:34,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:34,399 INFO L480 AbstractCegarLoop]: Abstraction has 21109 states and 62564 transitions. [2021-04-15 02:23:34,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:34,399 INFO L276 IsEmpty]: Start isEmpty. Operand 21109 states and 62564 transitions. [2021-04-15 02:23:34,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:23:34,425 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:34,425 INFO L551 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:34,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4893 [2021-04-15 02:23:34,625 INFO L428 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:34,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:34,626 INFO L82 PathProgramCache]: Analyzing trace with hash 156074215, now seen corresponding path program 385 times [2021-04-15 02:23:34,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:34,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895847609] [2021-04-15 02:23:34,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:34,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:34,726 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:23:34,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895847609] [2021-04-15 02:23:34,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673055379] [2021-04-15 02:23:34,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:34,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:34,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-04-15 02:23:34,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:35,385 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-04-15 02:23:35,386 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:23:35,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-04-15 02:23:36,544 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 658 [2021-04-15 02:23:37,974 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-04-15 02:23:38,199 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 1275 DAG size of output: 769 [2021-04-15 02:23:38,331 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 1275 DAG size of output: 769 [2021-04-15 02:23:38,471 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 1282 DAG size of output: 775 [2021-04-15 02:23:38,613 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 777 DAG size of output: 913 [2021-04-15 02:23:40,108 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 130 [2021-04-15 02:23:42,261 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 307 [2021-04-15 02:23:42,396 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 1417 DAG size of output: 844 [2021-04-15 02:23:42,556 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 1733 DAG size of output: 1075 [2021-04-15 02:23:42,717 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 1733 DAG size of output: 1075 [2021-04-15 02:23:42,881 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 1739 DAG size of output: 1081 [2021-04-15 02:23:42,993 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 1083 DAG size of output: 1089 [2021-04-15 02:23:44,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:23:44,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:23:44,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:23:44,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-04-15 02:23:44,400 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:44,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:44,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-04-15 02:23:44,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204875462] [2021-04-15 02:23:44,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:23:44,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:44,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:23:44,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:23:44,400 INFO L87 Difference]: Start difference. First operand 21109 states and 62564 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:44,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:44,801 INFO L93 Difference]: Finished difference Result 21361 states and 63065 transitions. [2021-04-15 02:23:44,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:23:44,802 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 02:23:44,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:44,830 INFO L225 Difference]: With dead ends: 21361 [2021-04-15 02:23:44,830 INFO L226 Difference]: Without dead ends: 21358 [2021-04-15 02:23:44,830 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 419.8ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:23:44,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21358 states. [2021-04-15 02:23:45,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21358 to 21176. [2021-04-15 02:23:45,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21176 states, 21175 states have (on average 2.965383707201889) internal successors, (62792), 21175 states have internal predecessors, (62792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:45,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21176 states to 21176 states and 62792 transitions. [2021-04-15 02:23:45,135 INFO L78 Accepts]: Start accepts. Automaton has 21176 states and 62792 transitions. Word has length 24 [2021-04-15 02:23:45,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:45,135 INFO L480 AbstractCegarLoop]: Abstraction has 21176 states and 62792 transitions. [2021-04-15 02:23:45,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:45,135 INFO L276 IsEmpty]: Start isEmpty. Operand 21176 states and 62792 transitions. [2021-04-15 02:23:45,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:23:45,161 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:45,161 INFO L551 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:45,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5738,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:45,362 INFO L428 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:45,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:45,362 INFO L82 PathProgramCache]: Analyzing trace with hash 973665583, now seen corresponding path program 386 times [2021-04-15 02:23:45,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:45,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041316666] [2021-04-15 02:23:45,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:45,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:45,460 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:45,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041316666] [2021-04-15 02:23:45,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084955593] [2021-04-15 02:23:45,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:45,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:23:45,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:45,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-04-15 02:23:45,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:46,128 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-04-15 02:23:46,128 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:23:46,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-04-15 02:23:49,585 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 491 [2021-04-15 02:23:51,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:23:51,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:23:51,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:23:51,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-04-15 02:23:51,964 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:51,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:51,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-04-15 02:23:51,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315072367] [2021-04-15 02:23:51,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:23:51,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:51,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:23:51,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:23:51,965 INFO L87 Difference]: Start difference. First operand 21176 states and 62792 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:52,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:52,643 INFO L93 Difference]: Finished difference Result 21460 states and 63374 transitions. [2021-04-15 02:23:52,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:23:52,644 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 02:23:52,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:52,689 INFO L225 Difference]: With dead ends: 21460 [2021-04-15 02:23:52,689 INFO L226 Difference]: Without dead ends: 21457 [2021-04-15 02:23:52,690 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 416.6ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:23:52,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21457 states. [2021-04-15 02:23:52,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21457 to 21256. [2021-04-15 02:23:52,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21256 states, 21255 states have (on average 2.967254763585039) internal successors, (63069), 21255 states have internal predecessors, (63069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:53,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21256 states to 21256 states and 63069 transitions. [2021-04-15 02:23:53,035 INFO L78 Accepts]: Start accepts. Automaton has 21256 states and 63069 transitions. Word has length 24 [2021-04-15 02:23:53,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:53,035 INFO L480 AbstractCegarLoop]: Abstraction has 21256 states and 63069 transitions. [2021-04-15 02:23:53,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:53,035 INFO L276 IsEmpty]: Start isEmpty. Operand 21256 states and 63069 transitions. [2021-04-15 02:23:53,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:23:53,053 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:53,053 INFO L551 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:53,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8151,388 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:53,254 INFO L428 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:53,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:53,254 INFO L82 PathProgramCache]: Analyzing trace with hash 549194215, now seen corresponding path program 387 times [2021-04-15 02:23:53,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:53,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015137888] [2021-04-15 02:23:53,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:53,329 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:23:53,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015137888] [2021-04-15 02:23:53,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332831792] [2021-04-15 02:23:53,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:53,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-04-15 02:23:53,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:53,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-04-15 02:23:53,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:53,939 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-04-15 02:23:53,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:23:53,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-04-15 02:23:56,420 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 1201 DAG size of output: 775 [2021-04-15 02:23:58,319 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 1135 DAG size of output: 645 [2021-04-15 02:23:59,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:23:59,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:23:59,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:23:59,465 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-04-15 02:23:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:59,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:59,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-04-15 02:23:59,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562369552] [2021-04-15 02:23:59,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:23:59,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:59,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:23:59,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:23:59,475 INFO L87 Difference]: Start difference. First operand 21256 states and 63069 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:59,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:59,996 INFO L93 Difference]: Finished difference Result 21580 states and 63776 transitions. [2021-04-15 02:23:59,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:23:59,997 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 02:23:59,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:00,047 INFO L225 Difference]: With dead ends: 21580 [2021-04-15 02:24:00,047 INFO L226 Difference]: Without dead ends: 21577 [2021-04-15 02:24:00,047 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 350.4ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:24:00,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21577 states. [2021-04-15 02:24:00,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21577 to 21367. [2021-04-15 02:24:00,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21367 states, 21366 states have (on average 2.9702798839277356) internal successors, (63463), 21366 states have internal predecessors, (63463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:00,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21367 states to 21367 states and 63463 transitions. [2021-04-15 02:24:00,472 INFO L78 Accepts]: Start accepts. Automaton has 21367 states and 63463 transitions. Word has length 24 [2021-04-15 02:24:00,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:00,472 INFO L480 AbstractCegarLoop]: Abstraction has 21367 states and 63463 transitions. [2021-04-15 02:24:00,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:00,473 INFO L276 IsEmpty]: Start isEmpty. Operand 21367 states and 63463 transitions. [2021-04-15 02:24:00,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:24:00,501 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:00,501 INFO L551 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:00,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9449,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:00,702 INFO L428 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:00,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:00,702 INFO L82 PathProgramCache]: Analyzing trace with hash 275483695, now seen corresponding path program 388 times [2021-04-15 02:24:00,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:00,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86090128] [2021-04-15 02:24:00,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:00,799 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:00,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86090128] [2021-04-15 02:24:00,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996810506] [2021-04-15 02:24:00,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:00,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:24:00,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:00,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-04-15 02:24:00,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:01,460 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-04-15 02:24:01,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:24:01,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-04-15 02:24:02,240 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 334 [2021-04-15 02:24:05,279 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 338 [2021-04-15 02:24:07,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:24:07,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:24:07,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:24:07,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-04-15 02:24:07,264 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:07,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:07,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-04-15 02:24:07,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827728272] [2021-04-15 02:24:07,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:24:07,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:07,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:24:07,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:24:07,265 INFO L87 Difference]: Start difference. First operand 21367 states and 63463 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:08,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:08,019 INFO L93 Difference]: Finished difference Result 21704 states and 64205 transitions. [2021-04-15 02:24:08,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:24:08,020 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 02:24:08,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:08,066 INFO L225 Difference]: With dead ends: 21704 [2021-04-15 02:24:08,066 INFO L226 Difference]: Without dead ends: 21701 [2021-04-15 02:24:08,067 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 418.2ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:24:08,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21701 states. [2021-04-15 02:24:08,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21701 to 21484. [2021-04-15 02:24:08,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21484 states, 21483 states have (on average 2.973746683424103) internal successors, (63885), 21483 states have internal predecessors, (63885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:08,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21484 states to 21484 states and 63885 transitions. [2021-04-15 02:24:08,478 INFO L78 Accepts]: Start accepts. Automaton has 21484 states and 63885 transitions. Word has length 24 [2021-04-15 02:24:08,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:08,478 INFO L480 AbstractCegarLoop]: Abstraction has 21484 states and 63885 transitions. [2021-04-15 02:24:08,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:08,478 INFO L276 IsEmpty]: Start isEmpty. Operand 21484 states and 63885 transitions. [2021-04-15 02:24:08,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:24:08,505 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:08,505 INFO L551 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:08,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10529 [2021-04-15 02:24:08,705 INFO L428 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:08,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:08,706 INFO L82 PathProgramCache]: Analyzing trace with hash 380392167, now seen corresponding path program 389 times [2021-04-15 02:24:08,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:08,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197007095] [2021-04-15 02:24:08,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:08,801 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:24:08,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197007095] [2021-04-15 02:24:08,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719646868] [2021-04-15 02:24:08,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:08,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:24:08,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:08,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-04-15 02:24:08,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:09,608 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-04-15 02:24:09,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:24:09,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-04-15 02:24:12,171 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 1256 DAG size of output: 974 [2021-04-15 02:24:12,332 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 310 [2021-04-15 02:24:15,065 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 725 DAG size of output: 540 [2021-04-15 02:24:15,250 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 1198 DAG size of output: 980 [2021-04-15 02:24:15,562 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 2159 DAG size of output: 1442 [2021-04-15 02:24:15,778 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 2159 DAG size of output: 1442 [2021-04-15 02:24:16,001 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 2166 DAG size of output: 1449 [2021-04-15 02:24:16,240 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 1451 DAG size of output: 1725 [2021-04-15 02:24:16,851 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 1019 DAG size of output: 989 [2021-04-15 02:24:16,994 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 991 DAG size of output: 946 [2021-04-15 02:24:17,224 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 284 [2021-04-15 02:24:18,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:24:18,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:24:18,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:24:18,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-04-15 02:24:18,603 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:18,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:18,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-04-15 02:24:18,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342170937] [2021-04-15 02:24:18,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:24:18,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:18,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:24:18,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:24:18,604 INFO L87 Difference]: Start difference. First operand 21484 states and 63885 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:19,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:19,169 INFO L93 Difference]: Finished difference Result 21935 states and 64985 transitions. [2021-04-15 02:24:19,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:24:19,170 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 02:24:19,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:19,214 INFO L225 Difference]: With dead ends: 21935 [2021-04-15 02:24:19,214 INFO L226 Difference]: Without dead ends: 21932 [2021-04-15 02:24:19,214 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 561.3ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:24:19,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21932 states. [2021-04-15 02:24:19,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21932 to 21709. [2021-04-15 02:24:19,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21709 states, 21708 states have (on average 2.9790399852588907) internal successors, (64669), 21708 states have internal predecessors, (64669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:19,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21709 states to 21709 states and 64669 transitions. [2021-04-15 02:24:19,628 INFO L78 Accepts]: Start accepts. Automaton has 21709 states and 64669 transitions. Word has length 24 [2021-04-15 02:24:19,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:19,628 INFO L480 AbstractCegarLoop]: Abstraction has 21709 states and 64669 transitions. [2021-04-15 02:24:19,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:19,628 INFO L276 IsEmpty]: Start isEmpty. Operand 21709 states and 64669 transitions. [2021-04-15 02:24:19,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:24:19,655 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:19,655 INFO L551 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:19,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11870 [2021-04-15 02:24:19,856 INFO L428 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:19,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:19,856 INFO L82 PathProgramCache]: Analyzing trace with hash -662412497, now seen corresponding path program 390 times [2021-04-15 02:24:19,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:19,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442764649] [2021-04-15 02:24:19,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:19,951 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:19,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442764649] [2021-04-15 02:24:19,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227745469] [2021-04-15 02:24:19,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:19,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:24:19,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:19,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-04-15 02:24:19,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:20,630 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-04-15 02:24:20,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:24:20,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-04-15 02:24:21,944 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 482 DAG size of output: 343 [2021-04-15 02:24:24,033 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 1815 DAG size of output: 1262 [2021-04-15 02:24:24,177 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 1264 DAG size of output: 1494 [2021-04-15 02:24:24,296 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1129 DAG size of output: 1342 [2021-04-15 02:24:24,553 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 546 [2021-04-15 02:24:29,453 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 1361 DAG size of output: 1038 [2021-04-15 02:24:29,640 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 1520 DAG size of output: 1148 [2021-04-15 02:24:29,844 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 1682 DAG size of output: 1227 [2021-04-15 02:24:30,090 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 2107 DAG size of output: 1546 [2021-04-15 02:24:30,512 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 2783 DAG size of output: 2028 [2021-04-15 02:24:30,855 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 3174 DAG size of output: 2232 [2021-04-15 02:24:31,202 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 3174 DAG size of output: 2232 [2021-04-15 02:24:31,557 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 3180 DAG size of output: 2238 [2021-04-15 02:24:31,972 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 2240 DAG size of output: 2627 [2021-04-15 02:24:32,309 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 1733 DAG size of output: 1711 [2021-04-15 02:24:32,472 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 1553 DAG size of output: 1540 [2021-04-15 02:24:32,620 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 1339 DAG size of output: 1313 [2021-04-15 02:24:32,788 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 1175 DAG size of output: 1144 [2021-04-15 02:24:33,998 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 2474 DAG size of output: 1051 [2021-04-15 02:24:34,141 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 2474 DAG size of output: 1051 [2021-04-15 02:24:34,284 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 2479 DAG size of output: 1056 [2021-04-15 02:24:34,523 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 1058 DAG size of output: 1081 [2021-04-15 02:24:35,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:24:35,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:24:35,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:24:35,817 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-04-15 02:24:35,825 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:35,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:35,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-04-15 02:24:35,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824842834] [2021-04-15 02:24:35,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:24:35,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:35,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:24:35,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:24:35,825 INFO L87 Difference]: Start difference. First operand 21709 states and 64669 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:36,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:36,250 INFO L93 Difference]: Finished difference Result 22176 states and 65792 transitions. [2021-04-15 02:24:36,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:24:36,251 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 02:24:36,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:36,283 INFO L225 Difference]: With dead ends: 22176 [2021-04-15 02:24:36,283 INFO L226 Difference]: Without dead ends: 22173 [2021-04-15 02:24:36,283 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 424.2ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:24:36,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22173 states. [2021-04-15 02:24:36,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22173 to 21946. [2021-04-15 02:24:36,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21946 states, 21945 states have (on average 2.983732057416268) internal successors, (65478), 21945 states have internal predecessors, (65478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:36,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21946 states to 21946 states and 65478 transitions. [2021-04-15 02:24:36,624 INFO L78 Accepts]: Start accepts. Automaton has 21946 states and 65478 transitions. Word has length 24 [2021-04-15 02:24:36,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:36,624 INFO L480 AbstractCegarLoop]: Abstraction has 21946 states and 65478 transitions. [2021-04-15 02:24:36,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:36,625 INFO L276 IsEmpty]: Start isEmpty. Operand 21946 states and 65478 transitions. [2021-04-15 02:24:36,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:24:36,652 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:36,652 INFO L551 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:36,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13588 [2021-04-15 02:24:36,857 INFO L428 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:36,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:36,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1370381287, now seen corresponding path program 391 times [2021-04-15 02:24:36,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:36,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114766815] [2021-04-15 02:24:36,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:36,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:36,956 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:24:36,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114766815] [2021-04-15 02:24:36,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266836935] [2021-04-15 02:24:36,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:36,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:36,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-04-15 02:24:36,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:37,626 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-04-15 02:24:37,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:24:37,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-04-15 02:24:41,540 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 691 DAG size of output: 481 [2021-04-15 02:24:41,829 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 1440 DAG size of output: 873 [2021-04-15 02:24:41,972 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 1440 DAG size of output: 873 [2021-04-15 02:24:42,120 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 1451 DAG size of output: 884 [2021-04-15 02:24:44,013 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 305 [2021-04-15 02:24:44,305 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 1030 DAG size of output: 820 [2021-04-15 02:24:45,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:24:45,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:24:45,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:24:45,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-04-15 02:24:45,374 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:45,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:45,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-04-15 02:24:45,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525737533] [2021-04-15 02:24:45,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:24:45,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:45,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:24:45,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:24:45,375 INFO L87 Difference]: Start difference. First operand 21946 states and 65478 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:46,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:46,020 INFO L93 Difference]: Finished difference Result 23670 states and 70444 transitions. [2021-04-15 02:24:46,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:24:46,021 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 02:24:46,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:46,074 INFO L225 Difference]: With dead ends: 23670 [2021-04-15 02:24:46,074 INFO L226 Difference]: Without dead ends: 23667 [2021-04-15 02:24:46,074 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 425.3ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:24:46,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23667 states. [2021-04-15 02:24:46,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23667 to 23451. [2021-04-15 02:24:46,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23451 states, 23450 states have (on average 2.99181236673774) internal successors, (70158), 23450 states have internal predecessors, (70158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:46,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23451 states to 23451 states and 70158 transitions. [2021-04-15 02:24:46,534 INFO L78 Accepts]: Start accepts. Automaton has 23451 states and 70158 transitions. Word has length 24 [2021-04-15 02:24:46,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:46,534 INFO L480 AbstractCegarLoop]: Abstraction has 23451 states and 70158 transitions. [2021-04-15 02:24:46,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:46,534 INFO L276 IsEmpty]: Start isEmpty. Operand 23451 states and 70158 transitions. [2021-04-15 02:24:46,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:24:46,565 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:46,565 INFO L551 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:46,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 393 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16763 [2021-04-15 02:24:46,765 INFO L428 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:46,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:46,766 INFO L82 PathProgramCache]: Analyzing trace with hash -37520849, now seen corresponding path program 392 times [2021-04-15 02:24:46,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:46,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411885771] [2021-04-15 02:24:46,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:46,865 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:46,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411885771] [2021-04-15 02:24:46,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741497658] [2021-04-15 02:24:46,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:46,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:24:46,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:46,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-04-15 02:24:46,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:47,545 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-04-15 02:24:47,545 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:24:47,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-04-15 02:24:48,275 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-04-15 02:24:50,370 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 1195 DAG size of output: 748 [2021-04-15 02:24:50,483 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1195 DAG size of output: 748 [2021-04-15 02:24:50,599 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 1202 DAG size of output: 755 [2021-04-15 02:24:50,855 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 715 DAG size of output: 426 [2021-04-15 02:24:51,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:24:51,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:24:51,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:24:51,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-04-15 02:24:51,476 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:51,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:51,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-04-15 02:24:51,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385782512] [2021-04-15 02:24:51,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:24:51,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:51,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:24:51,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:24:51,477 INFO L87 Difference]: Start difference. First operand 23451 states and 70158 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:52,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:52,008 INFO L93 Difference]: Finished difference Result 29480 states and 87930 transitions. [2021-04-15 02:24:52,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:24:52,009 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 02:24:52,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:52,079 INFO L225 Difference]: With dead ends: 29480 [2021-04-15 02:24:52,079 INFO L226 Difference]: Without dead ends: 29477 [2021-04-15 02:24:52,079 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 433.8ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:24:52,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29477 states. [2021-04-15 02:24:52,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29477 to 29259. [2021-04-15 02:24:52,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29259 states, 29258 states have (on average 2.995830200287101) internal successors, (87652), 29258 states have internal predecessors, (87652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:52,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29259 states to 29259 states and 87652 transitions. [2021-04-15 02:24:52,687 INFO L78 Accepts]: Start accepts. Automaton has 29259 states and 87652 transitions. Word has length 24 [2021-04-15 02:24:52,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:52,687 INFO L480 AbstractCegarLoop]: Abstraction has 29259 states and 87652 transitions. [2021-04-15 02:24:52,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:52,687 INFO L276 IsEmpty]: Start isEmpty. Operand 29259 states and 87652 transitions. [2021-04-15 02:24:52,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:24:52,718 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:52,719 INFO L551 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:52,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18216 [2021-04-15 02:24:52,919 INFO L428 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:52,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:52,919 INFO L82 PathProgramCache]: Analyzing trace with hash -732814105, now seen corresponding path program 393 times [2021-04-15 02:24:52,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:52,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252224327] [2021-04-15 02:24:52,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:52,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:53,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252224327] [2021-04-15 02:24:53,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874719505] [2021-04-15 02:24:53,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:53,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:24:53,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:53,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-04-15 02:24:53,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:53,706 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-04-15 02:24:53,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:24:53,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-04-15 02:24:55,561 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-04-15 02:24:56,445 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 2221 DAG size of output: 1943 [2021-04-15 02:24:56,571 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 2221 DAG size of output: 1943 [2021-04-15 02:24:56,707 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 2236 DAG size of output: 1958 [2021-04-15 02:24:58,501 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 182 [2021-04-15 02:25:01,288 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-04-15 02:25:01,908 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 2753 DAG size of output: 1582 [2021-04-15 02:25:02,094 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 2753 DAG size of output: 1582 [2021-04-15 02:25:02,372 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 2761 DAG size of output: 1781 [2021-04-15 02:25:02,503 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 1457 DAG size of output: 1277 [2021-04-15 02:25:03,887 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 329 [2021-04-15 02:25:05,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:25:05,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:25:05,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:25:05,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-04-15 02:25:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:05,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:05,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-04-15 02:25:05,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151486263] [2021-04-15 02:25:05,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:25:05,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:05,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:25:05,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:25:05,918 INFO L87 Difference]: Start difference. First operand 29259 states and 87652 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:06,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:06,620 INFO L93 Difference]: Finished difference Result 34712 states and 103669 transitions. [2021-04-15 02:25:06,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:25:06,621 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 02:25:06,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:06,707 INFO L225 Difference]: With dead ends: 34712 [2021-04-15 02:25:06,707 INFO L226 Difference]: Without dead ends: 34709 [2021-04-15 02:25:06,707 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 443.2ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:25:06,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34709 states. [2021-04-15 02:25:07,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34709 to 34499. [2021-04-15 02:25:07,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34499 states, 34498 states have (on average 2.997362165922662) internal successors, (103403), 34498 states have internal predecessors, (103403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:07,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34499 states to 34499 states and 103403 transitions. [2021-04-15 02:25:07,679 INFO L78 Accepts]: Start accepts. Automaton has 34499 states and 103403 transitions. Word has length 24 [2021-04-15 02:25:07,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:07,679 INFO L480 AbstractCegarLoop]: Abstraction has 34499 states and 103403 transitions. [2021-04-15 02:25:07,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:07,679 INFO L276 IsEmpty]: Start isEmpty. Operand 34499 states and 103403 transitions. [2021-04-15 02:25:07,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:25:07,726 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:07,726 INFO L551 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:07,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 395 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19117 [2021-04-15 02:25:07,926 INFO L428 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:07,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:07,931 INFO L82 PathProgramCache]: Analyzing trace with hash -569566705, now seen corresponding path program 394 times [2021-04-15 02:25:07,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:07,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693887899] [2021-04-15 02:25:07,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:07,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:08,112 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:08,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693887899] [2021-04-15 02:25:08,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227059650] [2021-04-15 02:25:08,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:08,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:25:08,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:08,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:25:08,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 55 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:08,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:08,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-04-15 02:25:08,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232610784] [2021-04-15 02:25:08,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 02:25:08,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:08,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 02:25:08,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:25:08,216 INFO L87 Difference]: Start difference. First operand 34499 states and 103403 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:08,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:08,704 INFO L93 Difference]: Finished difference Result 34720 states and 103729 transitions. [2021-04-15 02:25:08,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:25:08,706 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:25:08,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:08,789 INFO L225 Difference]: With dead ends: 34720 [2021-04-15 02:25:08,790 INFO L226 Difference]: Without dead ends: 34720 [2021-04-15 02:25:08,790 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 380.1ms TimeCoverageRelationStatistics Valid=412, Invalid=848, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 02:25:08,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34720 states. [2021-04-15 02:25:09,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34720 to 34459. [2021-04-15 02:25:09,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34459 states, 34458 states have (on average 2.9970398746299844) internal successors, (103272), 34458 states have internal predecessors, (103272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:09,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34459 states to 34459 states and 103272 transitions. [2021-04-15 02:25:09,606 INFO L78 Accepts]: Start accepts. Automaton has 34459 states and 103272 transitions. Word has length 25 [2021-04-15 02:25:09,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:09,606 INFO L480 AbstractCegarLoop]: Abstraction has 34459 states and 103272 transitions. [2021-04-15 02:25:09,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:09,607 INFO L276 IsEmpty]: Start isEmpty. Operand 34459 states and 103272 transitions. [2021-04-15 02:25:09,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:25:09,652 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:09,652 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:09,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21787 [2021-04-15 02:25:09,853 INFO L428 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:09,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:09,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1490602554, now seen corresponding path program 395 times [2021-04-15 02:25:09,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:09,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58529819] [2021-04-15 02:25:09,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:09,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:09,992 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-04-15 02:25:10,189 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:10,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58529819] [2021-04-15 02:25:10,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073133396] [2021-04-15 02:25:10,190 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:10,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:25:10,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:10,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:25:10,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:10,286 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:10,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:10,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-04-15 02:25:10,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596357658] [2021-04-15 02:25:10,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 02:25:10,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:10,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 02:25:10,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:25:10,287 INFO L87 Difference]: Start difference. First operand 34459 states and 103272 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:10,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:10,875 INFO L93 Difference]: Finished difference Result 35093 states and 104240 transitions. [2021-04-15 02:25:10,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 02:25:10,875 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:25:10,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:10,935 INFO L225 Difference]: With dead ends: 35093 [2021-04-15 02:25:10,935 INFO L226 Difference]: Without dead ends: 35080 [2021-04-15 02:25:10,935 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 426.2ms TimeCoverageRelationStatistics Valid=542, Invalid=1098, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 02:25:11,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35080 states. [2021-04-15 02:25:11,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35080 to 34497. [2021-04-15 02:25:11,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34497 states, 34496 states have (on average 2.996173469387755) internal successors, (103356), 34496 states have internal predecessors, (103356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:11,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34497 states to 34497 states and 103356 transitions. [2021-04-15 02:25:11,612 INFO L78 Accepts]: Start accepts. Automaton has 34497 states and 103356 transitions. Word has length 25 [2021-04-15 02:25:11,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:11,612 INFO L480 AbstractCegarLoop]: Abstraction has 34497 states and 103356 transitions. [2021-04-15 02:25:11,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:11,613 INFO L276 IsEmpty]: Start isEmpty. Operand 34497 states and 103356 transitions. [2021-04-15 02:25:11,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:25:11,662 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:11,662 INFO L551 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:11,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21788 [2021-04-15 02:25:11,862 INFO L428 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:11,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:11,863 INFO L82 PathProgramCache]: Analyzing trace with hash -446698831, now seen corresponding path program 396 times [2021-04-15 02:25:11,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:11,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737444366] [2021-04-15 02:25:11,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:11,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:11,990 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:11,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737444366] [2021-04-15 02:25:11,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217010714] [2021-04-15 02:25:11,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:12,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:25:12,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:12,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:25:12,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:12,261 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 56 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:12,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:12,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:25:12,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6882535] [2021-04-15 02:25:12,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:25:12,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:12,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:25:12,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:25:12,262 INFO L87 Difference]: Start difference. First operand 34497 states and 103356 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:12,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:12,672 INFO L93 Difference]: Finished difference Result 34544 states and 103423 transitions. [2021-04-15 02:25:12,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:25:12,673 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:25:12,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:12,759 INFO L225 Difference]: With dead ends: 34544 [2021-04-15 02:25:12,759 INFO L226 Difference]: Without dead ends: 34543 [2021-04-15 02:25:12,759 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 223.9ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:25:12,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34543 states. [2021-04-15 02:25:13,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34543 to 34497. [2021-04-15 02:25:13,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34497 states, 34496 states have (on average 2.996115491651206) internal successors, (103354), 34496 states have internal predecessors, (103354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:13,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34497 states to 34497 states and 103354 transitions. [2021-04-15 02:25:13,618 INFO L78 Accepts]: Start accepts. Automaton has 34497 states and 103354 transitions. Word has length 25 [2021-04-15 02:25:13,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:13,619 INFO L480 AbstractCegarLoop]: Abstraction has 34497 states and 103354 transitions. [2021-04-15 02:25:13,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:13,619 INFO L276 IsEmpty]: Start isEmpty. Operand 34497 states and 103354 transitions. [2021-04-15 02:25:13,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:25:13,669 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:13,669 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:13,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21789,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:13,869 INFO L428 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:13,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:13,870 INFO L82 PathProgramCache]: Analyzing trace with hash 470357522, now seen corresponding path program 397 times [2021-04-15 02:25:13,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:13,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770783876] [2021-04-15 02:25:13,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:13,988 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:13,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770783876] [2021-04-15 02:25:13,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310420440] [2021-04-15 02:25:13,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:14,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:14,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:25:14,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:14,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:14,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:25:14,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375521232] [2021-04-15 02:25:14,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:25:14,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:14,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:25:14,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:25:14,084 INFO L87 Difference]: Start difference. First operand 34497 states and 103354 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:14,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:14,514 INFO L93 Difference]: Finished difference Result 35864 states and 106497 transitions. [2021-04-15 02:25:14,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:25:14,518 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:25:14,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:14,614 INFO L225 Difference]: With dead ends: 35864 [2021-04-15 02:25:14,614 INFO L226 Difference]: Without dead ends: 35864 [2021-04-15 02:25:14,614 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:25:14,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35864 states. [2021-04-15 02:25:15,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35864 to 34468. [2021-04-15 02:25:15,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34468 states, 34467 states have (on average 2.9955029448457946) internal successors, (103246), 34467 states have internal predecessors, (103246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:15,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34468 states to 34468 states and 103246 transitions. [2021-04-15 02:25:15,339 INFO L78 Accepts]: Start accepts. Automaton has 34468 states and 103246 transitions. Word has length 25 [2021-04-15 02:25:15,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:15,339 INFO L480 AbstractCegarLoop]: Abstraction has 34468 states and 103246 transitions. [2021-04-15 02:25:15,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:15,339 INFO L276 IsEmpty]: Start isEmpty. Operand 34468 states and 103246 transitions. [2021-04-15 02:25:15,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:25:15,376 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:15,376 INFO L551 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:15,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21790,399 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:15,576 INFO L428 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:15,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:15,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1195948281, now seen corresponding path program 398 times [2021-04-15 02:25:15,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:15,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588254776] [2021-04-15 02:25:15,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:15,828 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 29 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:15,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588254776] [2021-04-15 02:25:15,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081693909] [2021-04-15 02:25:15,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:15,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:25:15,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:15,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:25:15,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:15,932 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 37 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:25:15,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:15,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:25:15,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065422714] [2021-04-15 02:25:15,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:25:15,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:15,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:25:15,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:25:15,933 INFO L87 Difference]: Start difference. First operand 34468 states and 103246 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:16,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:16,303 INFO L93 Difference]: Finished difference Result 34958 states and 104173 transitions. [2021-04-15 02:25:16,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:25:16,304 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:25:16,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:16,394 INFO L225 Difference]: With dead ends: 34958 [2021-04-15 02:25:16,394 INFO L226 Difference]: Without dead ends: 34958 [2021-04-15 02:25:16,394 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 329.4ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:25:16,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34958 states. [2021-04-15 02:25:17,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34958 to 34515. [2021-04-15 02:25:17,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34515 states, 34514 states have (on average 2.995624963782813) internal successors, (103391), 34514 states have internal predecessors, (103391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:17,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34515 states to 34515 states and 103391 transitions. [2021-04-15 02:25:17,328 INFO L78 Accepts]: Start accepts. Automaton has 34515 states and 103391 transitions. Word has length 25 [2021-04-15 02:25:17,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:17,328 INFO L480 AbstractCegarLoop]: Abstraction has 34515 states and 103391 transitions. [2021-04-15 02:25:17,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:17,328 INFO L276 IsEmpty]: Start isEmpty. Operand 34515 states and 103391 transitions. [2021-04-15 02:25:17,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:25:17,384 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:17,384 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:17,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21791,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:17,584 INFO L428 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:17,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:17,584 INFO L82 PathProgramCache]: Analyzing trace with hash -251186298, now seen corresponding path program 399 times [2021-04-15 02:25:17,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:17,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261302995] [2021-04-15 02:25:17,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:17,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:17,712 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:17,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261302995] [2021-04-15 02:25:17,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064788919] [2021-04-15 02:25:17,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:17,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:25:17,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:17,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:25:17,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:17,812 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:25:17,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:17,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:25:17,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108117420] [2021-04-15 02:25:17,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:25:17,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:17,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:25:17,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:25:17,813 INFO L87 Difference]: Start difference. First operand 34515 states and 103391 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:18,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:18,288 INFO L93 Difference]: Finished difference Result 35079 states and 104228 transitions. [2021-04-15 02:25:18,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:25:18,290 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:25:18,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:18,376 INFO L225 Difference]: With dead ends: 35079 [2021-04-15 02:25:18,376 INFO L226 Difference]: Without dead ends: 35077 [2021-04-15 02:25:18,376 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 260.1ms TimeCoverageRelationStatistics Valid=246, Invalid=404, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:25:18,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35077 states. [2021-04-15 02:25:19,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35077 to 34527. [2021-04-15 02:25:19,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34527 states, 34526 states have (on average 2.9958292301453975) internal successors, (103434), 34526 states have internal predecessors, (103434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:19,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34527 states to 34527 states and 103434 transitions. [2021-04-15 02:25:19,409 INFO L78 Accepts]: Start accepts. Automaton has 34527 states and 103434 transitions. Word has length 25 [2021-04-15 02:25:19,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:19,409 INFO L480 AbstractCegarLoop]: Abstraction has 34527 states and 103434 transitions. [2021-04-15 02:25:19,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:19,409 INFO L276 IsEmpty]: Start isEmpty. Operand 34527 states and 103434 transitions. [2021-04-15 02:25:19,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:25:19,452 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:19,452 INFO L551 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:19,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21792,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:19,653 INFO L428 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:19,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:19,653 INFO L82 PathProgramCache]: Analyzing trace with hash 549506409, now seen corresponding path program 400 times [2021-04-15 02:25:19,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:19,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485868334] [2021-04-15 02:25:19,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:19,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:19,736 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 39 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:19,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485868334] [2021-04-15 02:25:19,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399530879] [2021-04-15 02:25:19,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:19,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:25:19,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:19,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:25:19,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:19,808 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:19,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:19,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:25:19,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641509846] [2021-04-15 02:25:19,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:25:19,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:19,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:25:19,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:25:19,809 INFO L87 Difference]: Start difference. First operand 34527 states and 103434 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:20,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:20,143 INFO L93 Difference]: Finished difference Result 34780 states and 103823 transitions. [2021-04-15 02:25:20,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:25:20,143 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:25:20,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:20,194 INFO L225 Difference]: With dead ends: 34780 [2021-04-15 02:25:20,194 INFO L226 Difference]: Without dead ends: 34778 [2021-04-15 02:25:20,195 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:25:20,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34778 states. [2021-04-15 02:25:20,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34778 to 34497. [2021-04-15 02:25:20,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34497 states, 34496 states have (on average 2.9955936920222634) internal successors, (103336), 34496 states have internal predecessors, (103336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:21,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34497 states to 34497 states and 103336 transitions. [2021-04-15 02:25:21,017 INFO L78 Accepts]: Start accepts. Automaton has 34497 states and 103336 transitions. Word has length 25 [2021-04-15 02:25:21,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:21,017 INFO L480 AbstractCegarLoop]: Abstraction has 34497 states and 103336 transitions. [2021-04-15 02:25:21,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:21,017 INFO L276 IsEmpty]: Start isEmpty. Operand 34497 states and 103336 transitions. [2021-04-15 02:25:21,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:25:21,064 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:21,064 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:21,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21793 [2021-04-15 02:25:21,264 INFO L428 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:21,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:21,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1466562762, now seen corresponding path program 401 times [2021-04-15 02:25:21,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:21,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682033431] [2021-04-15 02:25:21,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:21,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:21,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682033431] [2021-04-15 02:25:21,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958448718] [2021-04-15 02:25:21,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:21,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:25:21,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:21,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:25:21,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:21,611 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:21,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:21,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:25:21,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464543180] [2021-04-15 02:25:21,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:25:21,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:21,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:25:21,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:25:21,612 INFO L87 Difference]: Start difference. First operand 34497 states and 103336 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:21,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:21,876 INFO L93 Difference]: Finished difference Result 35545 states and 105444 transitions. [2021-04-15 02:25:21,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:25:21,877 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:25:21,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:21,971 INFO L225 Difference]: With dead ends: 35545 [2021-04-15 02:25:21,971 INFO L226 Difference]: Without dead ends: 35545 [2021-04-15 02:25:21,971 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 114.9ms TimeCoverageRelationStatistics Valid=106, Invalid=134, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:25:22,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35545 states. [2021-04-15 02:25:22,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35545 to 34502. [2021-04-15 02:25:22,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34502 states, 34501 states have (on average 2.995536361264891) internal successors, (103349), 34501 states have internal predecessors, (103349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:22,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34502 states to 34502 states and 103349 transitions. [2021-04-15 02:25:22,877 INFO L78 Accepts]: Start accepts. Automaton has 34502 states and 103349 transitions. Word has length 25 [2021-04-15 02:25:22,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:22,877 INFO L480 AbstractCegarLoop]: Abstraction has 34502 states and 103349 transitions. [2021-04-15 02:25:22,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:22,877 INFO L276 IsEmpty]: Start isEmpty. Operand 34502 states and 103349 transitions. [2021-04-15 02:25:22,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:25:22,924 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:22,924 INFO L551 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:23,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 403 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21794 [2021-04-15 02:25:23,125 INFO L428 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:23,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:23,125 INFO L82 PathProgramCache]: Analyzing trace with hash -2034847579, now seen corresponding path program 402 times [2021-04-15 02:25:23,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:23,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135866943] [2021-04-15 02:25:23,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:23,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 40 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:23,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135866943] [2021-04-15 02:25:23,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008017944] [2021-04-15 02:25:23,247 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:23,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:25:23,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:23,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:25:23,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:23,344 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 48 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:23,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:23,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:25:23,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629202078] [2021-04-15 02:25:23,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:25:23,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:23,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:25:23,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:25:23,345 INFO L87 Difference]: Start difference. First operand 34502 states and 103349 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:23,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:23,891 INFO L93 Difference]: Finished difference Result 34731 states and 103707 transitions. [2021-04-15 02:25:23,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:25:23,892 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:25:23,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:23,968 INFO L225 Difference]: With dead ends: 34731 [2021-04-15 02:25:23,968 INFO L226 Difference]: Without dead ends: 34729 [2021-04-15 02:25:23,968 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 259.7ms TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:25:23,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34729 states. [2021-04-15 02:25:24,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34729 to 34502. [2021-04-15 02:25:24,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34502 states, 34501 states have (on average 2.9954783919306687) internal successors, (103347), 34501 states have internal predecessors, (103347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:24,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34502 states to 34502 states and 103347 transitions. [2021-04-15 02:25:24,653 INFO L78 Accepts]: Start accepts. Automaton has 34502 states and 103347 transitions. Word has length 25 [2021-04-15 02:25:24,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:24,653 INFO L480 AbstractCegarLoop]: Abstraction has 34502 states and 103347 transitions. [2021-04-15 02:25:24,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:24,653 INFO L276 IsEmpty]: Start isEmpty. Operand 34502 states and 103347 transitions. [2021-04-15 02:25:24,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:25:24,686 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:24,686 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:24,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21795 [2021-04-15 02:25:24,887 INFO L428 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:24,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:24,887 INFO L82 PathProgramCache]: Analyzing trace with hash -262484572, now seen corresponding path program 403 times [2021-04-15 02:25:24,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:24,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063123565] [2021-04-15 02:25:24,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:25,019 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:25,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063123565] [2021-04-15 02:25:25,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132911776] [2021-04-15 02:25:25,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:25,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:25:25,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:25,120 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:25,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:25,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:25:25,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814369127] [2021-04-15 02:25:25,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:25:25,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:25,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:25:25,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:25:25,121 INFO L87 Difference]: Start difference. First operand 34502 states and 103347 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:25,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:25,620 INFO L93 Difference]: Finished difference Result 37216 states and 110229 transitions. [2021-04-15 02:25:25,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:25:25,621 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:25:25,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:25,690 INFO L225 Difference]: With dead ends: 37216 [2021-04-15 02:25:25,690 INFO L226 Difference]: Without dead ends: 37216 [2021-04-15 02:25:25,690 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 148.6ms TimeCoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:25:25,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37216 states. [2021-04-15 02:25:26,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37216 to 34471. [2021-04-15 02:25:26,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34471 states, 34470 states have (on average 2.9948651000870323) internal successors, (103233), 34470 states have internal predecessors, (103233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:26,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34471 states to 34471 states and 103233 transitions. [2021-04-15 02:25:26,599 INFO L78 Accepts]: Start accepts. Automaton has 34471 states and 103233 transitions. Word has length 25 [2021-04-15 02:25:26,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:26,599 INFO L480 AbstractCegarLoop]: Abstraction has 34471 states and 103233 transitions. [2021-04-15 02:25:26,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:26,599 INFO L276 IsEmpty]: Start isEmpty. Operand 34471 states and 103233 transitions. [2021-04-15 02:25:26,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:25:26,649 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:26,649 INFO L551 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:26,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21796 [2021-04-15 02:25:26,850 INFO L428 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:26,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:26,850 INFO L82 PathProgramCache]: Analyzing trace with hash -378356913, now seen corresponding path program 404 times [2021-04-15 02:25:26,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:26,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803229873] [2021-04-15 02:25:26,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:26,972 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:26,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803229873] [2021-04-15 02:25:26,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438419706] [2021-04-15 02:25:26,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:26,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:25:26,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:26,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:25:26,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:27,076 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:25:27,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:27,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:25:27,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634176827] [2021-04-15 02:25:27,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:25:27,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:27,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:25:27,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:25:27,077 INFO L87 Difference]: Start difference. First operand 34471 states and 103233 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:27,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:27,452 INFO L93 Difference]: Finished difference Result 35061 states and 104338 transitions. [2021-04-15 02:25:27,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:25:27,454 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:25:27,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:27,543 INFO L225 Difference]: With dead ends: 35061 [2021-04-15 02:25:27,544 INFO L226 Difference]: Without dead ends: 35061 [2021-04-15 02:25:27,544 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 190.7ms TimeCoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:25:27,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35061 states. [2021-04-15 02:25:28,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35061 to 34496. [2021-04-15 02:25:28,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34496 states, 34495 states have (on average 2.9951007392375706) internal successors, (103316), 34495 states have internal predecessors, (103316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:28,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34496 states to 34496 states and 103316 transitions. [2021-04-15 02:25:28,491 INFO L78 Accepts]: Start accepts. Automaton has 34496 states and 103316 transitions. Word has length 25 [2021-04-15 02:25:28,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:28,491 INFO L480 AbstractCegarLoop]: Abstraction has 34496 states and 103316 transitions. [2021-04-15 02:25:28,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:28,491 INFO L276 IsEmpty]: Start isEmpty. Operand 34496 states and 103316 transitions. [2021-04-15 02:25:28,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:25:28,533 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:28,533 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:28,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21797 [2021-04-15 02:25:28,734 INFO L428 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:28,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:28,734 INFO L82 PathProgramCache]: Analyzing trace with hash 566405070, now seen corresponding path program 405 times [2021-04-15 02:25:28,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:28,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298538828] [2021-04-15 02:25:28,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:28,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:28,810 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 37 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:28,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298538828] [2021-04-15 02:25:28,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687900736] [2021-04-15 02:25:28,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:28,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:25:28,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:28,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:25:28,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:28,884 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:25:28,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:28,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:25:28,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460357037] [2021-04-15 02:25:28,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:25:28,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:28,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:25:28,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:25:28,885 INFO L87 Difference]: Start difference. First operand 34496 states and 103316 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:29,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:29,202 INFO L93 Difference]: Finished difference Result 35075 states and 104177 transitions. [2021-04-15 02:25:29,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:25:29,203 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:25:29,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:29,250 INFO L225 Difference]: With dead ends: 35075 [2021-04-15 02:25:29,250 INFO L226 Difference]: Without dead ends: 35073 [2021-04-15 02:25:29,250 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 161.1ms TimeCoverageRelationStatistics Valid=245, Invalid=405, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:25:29,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35073 states. [2021-04-15 02:25:30,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35073 to 34510. [2021-04-15 02:25:30,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34510 states, 34509 states have (on average 2.995276594511577) internal successors, (103364), 34509 states have internal predecessors, (103364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:30,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34510 states to 34510 states and 103364 transitions. [2021-04-15 02:25:30,152 INFO L78 Accepts]: Start accepts. Automaton has 34510 states and 103364 transitions. Word has length 25 [2021-04-15 02:25:30,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:30,152 INFO L480 AbstractCegarLoop]: Abstraction has 34510 states and 103364 transitions. [2021-04-15 02:25:30,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:30,152 INFO L276 IsEmpty]: Start isEmpty. Operand 34510 states and 103364 transitions. [2021-04-15 02:25:30,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:25:30,200 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:30,200 INFO L551 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:30,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21798 [2021-04-15 02:25:30,401 INFO L428 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:30,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:30,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1367097777, now seen corresponding path program 406 times [2021-04-15 02:25:30,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:30,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554535135] [2021-04-15 02:25:30,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:30,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:30,506 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:25:30,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554535135] [2021-04-15 02:25:30,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974797534] [2021-04-15 02:25:30,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:30,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:25:30,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:30,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:25:30,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:30,781 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:25:30,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:30,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:25:30,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619770337] [2021-04-15 02:25:30,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:25:30,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:30,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:25:30,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:25:30,781 INFO L87 Difference]: Start difference. First operand 34510 states and 103364 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:31,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:31,228 INFO L93 Difference]: Finished difference Result 34813 states and 103831 transitions. [2021-04-15 02:25:31,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:25:31,229 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:25:31,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:31,325 INFO L225 Difference]: With dead ends: 34813 [2021-04-15 02:25:31,325 INFO L226 Difference]: Without dead ends: 34811 [2021-04-15 02:25:31,325 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 194.3ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:25:31,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34811 states. [2021-04-15 02:25:32,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34811 to 34480. [2021-04-15 02:25:32,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34480 states, 34479 states have (on average 2.9950694625714203) internal successors, (103267), 34479 states have internal predecessors, (103267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:32,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34480 states to 34480 states and 103267 transitions. [2021-04-15 02:25:32,209 INFO L78 Accepts]: Start accepts. Automaton has 34480 states and 103267 transitions. Word has length 25 [2021-04-15 02:25:32,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:32,209 INFO L480 AbstractCegarLoop]: Abstraction has 34480 states and 103267 transitions. [2021-04-15 02:25:32,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:32,209 INFO L276 IsEmpty]: Start isEmpty. Operand 34480 states and 103267 transitions. [2021-04-15 02:25:32,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:25:32,259 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:32,259 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:32,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21799,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:32,459 INFO L428 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:32,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:32,460 INFO L82 PathProgramCache]: Analyzing trace with hash -2010813166, now seen corresponding path program 407 times [2021-04-15 02:25:32,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:32,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936332902] [2021-04-15 02:25:32,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:32,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:25:32,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936332902] [2021-04-15 02:25:32,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316915043] [2021-04-15 02:25:32,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:32,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:25:32,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:32,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:25:32,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:32,674 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 36 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:25:32,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:32,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:25:32,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009858068] [2021-04-15 02:25:32,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:25:32,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:32,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:25:32,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:25:32,675 INFO L87 Difference]: Start difference. First operand 34480 states and 103267 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:32,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:32,937 INFO L93 Difference]: Finished difference Result 35049 states and 104051 transitions. [2021-04-15 02:25:32,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:25:32,938 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:25:32,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:33,029 INFO L225 Difference]: With dead ends: 35049 [2021-04-15 02:25:33,029 INFO L226 Difference]: Without dead ends: 35049 [2021-04-15 02:25:33,029 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:25:33,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35049 states. [2021-04-15 02:25:33,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35049 to 34468. [2021-04-15 02:25:33,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34468 states, 34467 states have (on average 2.994574520555894) internal successors, (103214), 34467 states have internal predecessors, (103214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:33,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34468 states to 34468 states and 103214 transitions. [2021-04-15 02:25:33,840 INFO L78 Accepts]: Start accepts. Automaton has 34468 states and 103214 transitions. Word has length 25 [2021-04-15 02:25:33,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:33,840 INFO L480 AbstractCegarLoop]: Abstraction has 34468 states and 103214 transitions. [2021-04-15 02:25:33,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:33,840 INFO L276 IsEmpty]: Start isEmpty. Operand 34468 states and 103214 transitions. [2021-04-15 02:25:33,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:25:33,873 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:33,873 INFO L551 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:34,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21800,409 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:34,073 INFO L428 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:34,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:34,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1217256211, now seen corresponding path program 408 times [2021-04-15 02:25:34,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:34,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236319988] [2021-04-15 02:25:34,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:34,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:34,160 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 33 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:34,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236319988] [2021-04-15 02:25:34,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546545467] [2021-04-15 02:25:34,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:34,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:25:34,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:34,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:25:34,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 40 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:34,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:34,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:25:34,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328041360] [2021-04-15 02:25:34,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:25:34,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:34,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:25:34,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:25:34,235 INFO L87 Difference]: Start difference. First operand 34468 states and 103214 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:34,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:34,678 INFO L93 Difference]: Finished difference Result 34766 states and 103678 transitions. [2021-04-15 02:25:34,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:25:34,679 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:25:34,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:34,768 INFO L225 Difference]: With dead ends: 34766 [2021-04-15 02:25:34,769 INFO L226 Difference]: Without dead ends: 34764 [2021-04-15 02:25:34,769 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 190.8ms TimeCoverageRelationStatistics Valid=268, Invalid=488, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:25:34,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34764 states. [2021-04-15 02:25:35,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34764 to 34468. [2021-04-15 02:25:35,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34468 states, 34467 states have (on average 2.994516494037775) internal successors, (103212), 34467 states have internal predecessors, (103212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:35,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34468 states to 34468 states and 103212 transitions. [2021-04-15 02:25:35,703 INFO L78 Accepts]: Start accepts. Automaton has 34468 states and 103212 transitions. Word has length 25 [2021-04-15 02:25:35,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:35,703 INFO L480 AbstractCegarLoop]: Abstraction has 34468 states and 103212 transitions. [2021-04-15 02:25:35,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:35,703 INFO L276 IsEmpty]: Start isEmpty. Operand 34468 states and 103212 transitions. [2021-04-15 02:25:35,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:25:35,752 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:35,752 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:35,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21801,410 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:35,953 INFO L428 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:35,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:35,953 INFO L82 PathProgramCache]: Analyzing trace with hash 555106796, now seen corresponding path program 409 times [2021-04-15 02:25:35,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:35,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218255657] [2021-04-15 02:25:35,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:36,070 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:36,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218255657] [2021-04-15 02:25:36,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916168727] [2021-04-15 02:25:36,071 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:36,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:36,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:25:36,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:36,168 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:36,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:36,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:25:36,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667209201] [2021-04-15 02:25:36,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:25:36,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:36,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:25:36,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:25:36,169 INFO L87 Difference]: Start difference. First operand 34468 states and 103212 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:36,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:36,474 INFO L93 Difference]: Finished difference Result 36516 states and 108167 transitions. [2021-04-15 02:25:36,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:25:36,476 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:25:36,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:36,570 INFO L225 Difference]: With dead ends: 36516 [2021-04-15 02:25:36,570 INFO L226 Difference]: Without dead ends: 36516 [2021-04-15 02:25:36,570 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=139, Invalid=203, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:25:36,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36516 states. [2021-04-15 02:25:37,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36516 to 34482. [2021-04-15 02:25:37,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34482 states, 34481 states have (on average 2.9944607174965925) internal successors, (103252), 34481 states have internal predecessors, (103252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:37,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34482 states to 34482 states and 103252 transitions. [2021-04-15 02:25:37,491 INFO L78 Accepts]: Start accepts. Automaton has 34482 states and 103252 transitions. Word has length 25 [2021-04-15 02:25:37,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:37,491 INFO L480 AbstractCegarLoop]: Abstraction has 34482 states and 103252 transitions. [2021-04-15 02:25:37,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:37,491 INFO L276 IsEmpty]: Start isEmpty. Operand 34482 states and 103252 transitions. [2021-04-15 02:25:37,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:25:37,539 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:37,539 INFO L551 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:37,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21802,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:37,740 INFO L428 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:37,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:37,740 INFO L82 PathProgramCache]: Analyzing trace with hash 272148785, now seen corresponding path program 410 times [2021-04-15 02:25:37,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:37,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417637961] [2021-04-15 02:25:37,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:37,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:37,864 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:37,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417637961] [2021-04-15 02:25:37,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250673871] [2021-04-15 02:25:37,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:37,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:25:37,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:37,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:25:37,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:37,949 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 42 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:37,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:37,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:25:37,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246522719] [2021-04-15 02:25:37,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:25:37,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:37,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:25:37,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:25:37,950 INFO L87 Difference]: Start difference. First operand 34482 states and 103252 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:38,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:38,578 INFO L93 Difference]: Finished difference Result 34881 states and 104144 transitions. [2021-04-15 02:25:38,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:25:38,580 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:25:38,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:38,673 INFO L225 Difference]: With dead ends: 34881 [2021-04-15 02:25:38,673 INFO L226 Difference]: Without dead ends: 34878 [2021-04-15 02:25:38,674 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 224.2ms TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:25:38,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34878 states. [2021-04-15 02:25:39,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34878 to 34485. [2021-04-15 02:25:39,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34485 states, 34484 states have (on average 2.9944032014847464) internal successors, (103259), 34484 states have internal predecessors, (103259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:39,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34485 states to 34485 states and 103259 transitions. [2021-04-15 02:25:39,282 INFO L78 Accepts]: Start accepts. Automaton has 34485 states and 103259 transitions. Word has length 25 [2021-04-15 02:25:39,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:39,283 INFO L480 AbstractCegarLoop]: Abstraction has 34485 states and 103259 transitions. [2021-04-15 02:25:39,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:39,283 INFO L276 IsEmpty]: Start isEmpty. Operand 34485 states and 103259 transitions. [2021-04-15 02:25:39,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:25:39,317 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:39,317 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:39,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21803 [2021-04-15 02:25:39,517 INFO L428 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:39,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:39,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1505753006, now seen corresponding path program 411 times [2021-04-15 02:25:39,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:39,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224456504] [2021-04-15 02:25:39,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:39,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:39,612 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:39,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224456504] [2021-04-15 02:25:39,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115357575] [2021-04-15 02:25:39,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:39,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:25:39,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:39,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:25:39,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:39,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:39,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:25:39,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470962207] [2021-04-15 02:25:39,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:25:39,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:39,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:25:39,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:25:39,726 INFO L87 Difference]: Start difference. First operand 34485 states and 103259 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:40,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:40,314 INFO L93 Difference]: Finished difference Result 46521 states and 138645 transitions. [2021-04-15 02:25:40,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:25:40,315 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:25:40,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:40,422 INFO L225 Difference]: With dead ends: 46521 [2021-04-15 02:25:40,422 INFO L226 Difference]: Without dead ends: 46521 [2021-04-15 02:25:40,422 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 147.4ms TimeCoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:25:40,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46521 states. [2021-04-15 02:25:41,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46521 to 44002. [2021-04-15 02:25:41,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44002 states, 44001 states have (on average 3.0104088543442193) internal successors, (132461), 44001 states have internal predecessors, (132461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:41,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44002 states to 44002 states and 132461 transitions. [2021-04-15 02:25:41,618 INFO L78 Accepts]: Start accepts. Automaton has 44002 states and 132461 transitions. Word has length 25 [2021-04-15 02:25:41,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:41,619 INFO L480 AbstractCegarLoop]: Abstraction has 44002 states and 132461 transitions. [2021-04-15 02:25:41,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:41,619 INFO L276 IsEmpty]: Start isEmpty. Operand 44002 states and 132461 transitions. [2021-04-15 02:25:41,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:25:41,673 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:41,673 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:41,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21804,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:41,874 INFO L428 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:41,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:41,874 INFO L82 PathProgramCache]: Analyzing trace with hash 460670884, now seen corresponding path program 412 times [2021-04-15 02:25:41,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:41,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502273106] [2021-04-15 02:25:41,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:41,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:41,968 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:25:41,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502273106] [2021-04-15 02:25:41,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376183643] [2021-04-15 02:25:41,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:41,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:25:41,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:41,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:25:41,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:42,043 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:25:42,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:42,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:25:42,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458176307] [2021-04-15 02:25:42,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:25:42,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:42,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:25:42,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:25:42,044 INFO L87 Difference]: Start difference. First operand 44002 states and 132461 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:42,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:42,474 INFO L93 Difference]: Finished difference Result 44568 states and 133377 transitions. [2021-04-15 02:25:42,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:25:42,475 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:25:42,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:42,589 INFO L225 Difference]: With dead ends: 44568 [2021-04-15 02:25:42,590 INFO L226 Difference]: Without dead ends: 44564 [2021-04-15 02:25:42,590 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 198.3ms TimeCoverageRelationStatistics Valid=214, Invalid=386, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:25:42,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44564 states. [2021-04-15 02:25:43,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44564 to 44065. [2021-04-15 02:25:43,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44065 states, 44064 states have (on average 3.0110748002904866) internal successors, (132680), 44064 states have internal predecessors, (132680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:43,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44065 states to 44065 states and 132680 transitions. [2021-04-15 02:25:43,762 INFO L78 Accepts]: Start accepts. Automaton has 44065 states and 132680 transitions. Word has length 25 [2021-04-15 02:25:43,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:43,762 INFO L480 AbstractCegarLoop]: Abstraction has 44065 states and 132680 transitions. [2021-04-15 02:25:43,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:43,762 INFO L276 IsEmpty]: Start isEmpty. Operand 44065 states and 132680 transitions. [2021-04-15 02:25:43,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:25:43,816 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:43,816 INFO L551 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:44,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21805,414 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:44,016 INFO L428 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:44,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:44,017 INFO L82 PathProgramCache]: Analyzing trace with hash 354023683, now seen corresponding path program 413 times [2021-04-15 02:25:44,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:44,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261033376] [2021-04-15 02:25:44,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 29 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:44,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261033376] [2021-04-15 02:25:44,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983981708] [2021-04-15 02:25:44,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:44,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-04-15 02:25:44,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:44,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:25:44,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:44,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:44,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:25:44,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498048448] [2021-04-15 02:25:44,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:25:44,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:44,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:25:44,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:25:44,177 INFO L87 Difference]: Start difference. First operand 44065 states and 132680 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:44,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:44,511 INFO L93 Difference]: Finished difference Result 44288 states and 133062 transitions. [2021-04-15 02:25:44,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:25:44,512 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:25:44,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:44,880 INFO L225 Difference]: With dead ends: 44288 [2021-04-15 02:25:44,880 INFO L226 Difference]: Without dead ends: 44282 [2021-04-15 02:25:44,881 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 158.5ms TimeCoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:25:44,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44282 states. [2021-04-15 02:25:45,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44282 to 44054. [2021-04-15 02:25:45,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44054 states, 44053 states have (on average 3.0111683653780674) internal successors, (132651), 44053 states have internal predecessors, (132651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:45,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44054 states to 44054 states and 132651 transitions. [2021-04-15 02:25:45,819 INFO L78 Accepts]: Start accepts. Automaton has 44054 states and 132651 transitions. Word has length 25 [2021-04-15 02:25:45,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:45,819 INFO L480 AbstractCegarLoop]: Abstraction has 44054 states and 132651 transitions. [2021-04-15 02:25:45,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:45,819 INFO L276 IsEmpty]: Start isEmpty. Operand 44054 states and 132651 transitions. [2021-04-15 02:25:45,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:25:45,876 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:45,876 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:46,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21806,415 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:46,076 INFO L428 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:46,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:46,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1423878108, now seen corresponding path program 414 times [2021-04-15 02:25:46,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:46,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509406932] [2021-04-15 02:25:46,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:46,451 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:46,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509406932] [2021-04-15 02:25:46,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138765678] [2021-04-15 02:25:46,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:46,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:25:46,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:46,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:25:46,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:46,549 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:46,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:46,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:25:46,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809977966] [2021-04-15 02:25:46,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:25:46,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:46,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:25:46,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:25:46,550 INFO L87 Difference]: Start difference. First operand 44054 states and 132651 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:46,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:46,910 INFO L93 Difference]: Finished difference Result 48810 states and 145573 transitions. [2021-04-15 02:25:46,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:25:46,911 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:25:46,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:47,036 INFO L225 Difference]: With dead ends: 48810 [2021-04-15 02:25:47,036 INFO L226 Difference]: Without dead ends: 48810 [2021-04-15 02:25:47,036 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 421.3ms TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:25:47,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48810 states. [2021-04-15 02:25:47,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48810 to 34578. [2021-04-15 02:25:48,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34578 states, 34577 states have (on average 2.9973971136882898) internal successors, (103641), 34577 states have internal predecessors, (103641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:48,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34578 states to 34578 states and 103641 transitions. [2021-04-15 02:25:48,105 INFO L78 Accepts]: Start accepts. Automaton has 34578 states and 103641 transitions. Word has length 25 [2021-04-15 02:25:48,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:48,105 INFO L480 AbstractCegarLoop]: Abstraction has 34578 states and 103641 transitions. [2021-04-15 02:25:48,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:48,105 INFO L276 IsEmpty]: Start isEmpty. Operand 34578 states and 103641 transitions. [2021-04-15 02:25:48,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:25:48,152 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:48,152 INFO L551 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:48,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21807,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:48,352 INFO L428 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:48,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:48,352 INFO L82 PathProgramCache]: Analyzing trace with hash -802828281, now seen corresponding path program 415 times [2021-04-15 02:25:48,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:48,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396602199] [2021-04-15 02:25:48,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:48,481 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:48,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396602199] [2021-04-15 02:25:48,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156194002] [2021-04-15 02:25:48,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:48,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:25:48,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 27 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:25:48,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:48,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:25:48,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042408787] [2021-04-15 02:25:48,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:25:48,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:48,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:25:48,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:25:48,577 INFO L87 Difference]: Start difference. First operand 34578 states and 103641 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:48,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:48,914 INFO L93 Difference]: Finished difference Result 35262 states and 104945 transitions. [2021-04-15 02:25:48,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:25:48,916 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:25:48,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:49,001 INFO L225 Difference]: With dead ends: 35262 [2021-04-15 02:25:49,001 INFO L226 Difference]: Without dead ends: 35262 [2021-04-15 02:25:49,001 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 182.5ms TimeCoverageRelationStatistics Valid=184, Invalid=278, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:25:49,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35262 states. [2021-04-15 02:25:49,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35262 to 34634. [2021-04-15 02:25:49,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34634 states, 34633 states have (on average 2.997574567608928) internal successors, (103815), 34633 states have internal predecessors, (103815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:49,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34634 states to 34634 states and 103815 transitions. [2021-04-15 02:25:49,787 INFO L78 Accepts]: Start accepts. Automaton has 34634 states and 103815 transitions. Word has length 25 [2021-04-15 02:25:49,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:49,787 INFO L480 AbstractCegarLoop]: Abstraction has 34634 states and 103815 transitions. [2021-04-15 02:25:49,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:49,787 INFO L276 IsEmpty]: Start isEmpty. Operand 34634 states and 103815 transitions. [2021-04-15 02:25:49,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:25:49,821 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:49,821 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:50,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21808 [2021-04-15 02:25:50,025 INFO L428 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:50,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:50,025 INFO L82 PathProgramCache]: Analyzing trace with hash 141933702, now seen corresponding path program 416 times [2021-04-15 02:25:50,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:50,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705077955] [2021-04-15 02:25:50,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:50,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:50,097 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:50,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705077955] [2021-04-15 02:25:50,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359685425] [2021-04-15 02:25:50,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:50,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:25:50,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:50,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:25:50,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:50,171 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 43 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:25:50,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:50,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:25:50,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139032865] [2021-04-15 02:25:50,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:25:50,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:50,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:25:50,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:25:50,172 INFO L87 Difference]: Start difference. First operand 34634 states and 103815 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:50,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:50,494 INFO L93 Difference]: Finished difference Result 35187 states and 104616 transitions. [2021-04-15 02:25:50,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:25:50,495 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:25:50,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:50,582 INFO L225 Difference]: With dead ends: 35187 [2021-04-15 02:25:50,582 INFO L226 Difference]: Without dead ends: 35183 [2021-04-15 02:25:50,583 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 148.9ms TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:25:50,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35183 states. [2021-04-15 02:25:51,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35183 to 34619. [2021-04-15 02:25:51,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34619 states, 34618 states have (on average 2.997255762897914) internal successors, (103759), 34618 states have internal predecessors, (103759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:51,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34619 states to 34619 states and 103759 transitions. [2021-04-15 02:25:51,512 INFO L78 Accepts]: Start accepts. Automaton has 34619 states and 103759 transitions. Word has length 25 [2021-04-15 02:25:51,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:51,512 INFO L480 AbstractCegarLoop]: Abstraction has 34619 states and 103759 transitions. [2021-04-15 02:25:51,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:51,512 INFO L276 IsEmpty]: Start isEmpty. Operand 34619 states and 103759 transitions. [2021-04-15 02:25:51,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:25:51,562 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:51,562 INFO L551 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:51,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21809,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:51,763 INFO L428 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:51,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:51,763 INFO L82 PathProgramCache]: Analyzing trace with hash 942626409, now seen corresponding path program 417 times [2021-04-15 02:25:51,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:51,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422904953] [2021-04-15 02:25:51,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:51,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:51,875 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 30 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:51,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422904953] [2021-04-15 02:25:51,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467007772] [2021-04-15 02:25:51,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:51,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:25:51,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:51,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-15 02:25:51,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:52,176 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-04-15 02:25:52,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:52,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-04-15 02:25:52,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219189720] [2021-04-15 02:25:52,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 02:25:52,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:52,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 02:25:52,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:25:52,178 INFO L87 Difference]: Start difference. First operand 34619 states and 103759 transitions. Second operand has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:54,682 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-04-15 02:25:55,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:55,322 INFO L93 Difference]: Finished difference Result 67922 states and 202433 transitions. [2021-04-15 02:25:55,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-04-15 02:25:55,323 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:25:55,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:55,504 INFO L225 Difference]: With dead ends: 67922 [2021-04-15 02:25:55,504 INFO L226 Difference]: Without dead ends: 67903 [2021-04-15 02:25:55,505 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5477 ImplicationChecksByTransitivity, 2234.2ms TimeCoverageRelationStatistics Valid=1479, Invalid=14021, Unknown=0, NotChecked=0, Total=15500 [2021-04-15 02:25:55,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67903 states. [2021-04-15 02:25:56,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67903 to 38876. [2021-04-15 02:25:56,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38876 states, 38875 states have (on average 2.9676655948553057) internal successors, (115368), 38875 states have internal predecessors, (115368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:56,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38876 states to 38876 states and 115368 transitions. [2021-04-15 02:25:56,491 INFO L78 Accepts]: Start accepts. Automaton has 38876 states and 115368 transitions. Word has length 25 [2021-04-15 02:25:56,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:56,491 INFO L480 AbstractCegarLoop]: Abstraction has 38876 states and 115368 transitions. [2021-04-15 02:25:56,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:56,491 INFO L276 IsEmpty]: Start isEmpty. Operand 38876 states and 115368 transitions. [2021-04-15 02:25:56,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:25:56,524 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:56,524 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:56,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21810 [2021-04-15 02:25:56,724 INFO L428 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:56,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:56,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1859682762, now seen corresponding path program 418 times [2021-04-15 02:25:56,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:56,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530690421] [2021-04-15 02:25:56,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:56,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530690421] [2021-04-15 02:25:56,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528763616] [2021-04-15 02:25:56,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:56,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:25:56,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:56,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:25:56,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 41 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:56,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:56,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:25:56,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724292774] [2021-04-15 02:25:56,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:25:56,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:56,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:25:56,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:25:56,917 INFO L87 Difference]: Start difference. First operand 38876 states and 115368 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:57,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:57,184 INFO L93 Difference]: Finished difference Result 40813 states and 119859 transitions. [2021-04-15 02:25:57,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:25:57,185 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:25:57,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:57,283 INFO L225 Difference]: With dead ends: 40813 [2021-04-15 02:25:57,283 INFO L226 Difference]: Without dead ends: 40813 [2021-04-15 02:25:57,284 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=118, Invalid=154, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:25:57,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40813 states. [2021-04-15 02:25:58,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40813 to 38877. [2021-04-15 02:25:58,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38877 states, 38876 states have (on average 2.9672291388002883) internal successors, (115354), 38876 states have internal predecessors, (115354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:58,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38877 states to 38877 states and 115354 transitions. [2021-04-15 02:25:58,329 INFO L78 Accepts]: Start accepts. Automaton has 38877 states and 115354 transitions. Word has length 25 [2021-04-15 02:25:58,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:58,329 INFO L480 AbstractCegarLoop]: Abstraction has 38877 states and 115354 transitions. [2021-04-15 02:25:58,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:58,329 INFO L276 IsEmpty]: Start isEmpty. Operand 38877 states and 115354 transitions. [2021-04-15 02:25:58,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:25:58,381 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:58,381 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:58,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21811,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:58,581 INFO L428 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:58,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:58,582 INFO L82 PathProgramCache]: Analyzing trace with hash 130635428, now seen corresponding path program 419 times [2021-04-15 02:25:58,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:58,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808663445] [2021-04-15 02:25:58,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:58,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:58,684 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:25:58,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808663445] [2021-04-15 02:25:58,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015103968] [2021-04-15 02:25:58,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:58,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:25:58,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:58,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:25:58,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:58,789 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:25:58,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:58,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:25:58,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711645063] [2021-04-15 02:25:58,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:25:58,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:58,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:25:58,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:25:58,790 INFO L87 Difference]: Start difference. First operand 38877 states and 115354 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:59,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:59,057 INFO L93 Difference]: Finished difference Result 39523 states and 116192 transitions. [2021-04-15 02:25:59,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:25:59,058 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:25:59,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:59,153 INFO L225 Difference]: With dead ends: 39523 [2021-04-15 02:25:59,153 INFO L226 Difference]: Without dead ends: 39523 [2021-04-15 02:25:59,153 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 119.9ms TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:25:59,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39523 states. [2021-04-15 02:25:59,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39523 to 38819. [2021-04-15 02:25:59,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38819 states, 38818 states have (on average 2.9664330980472977) internal successors, (115151), 38818 states have internal predecessors, (115151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:00,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38819 states to 38819 states and 115151 transitions. [2021-04-15 02:26:00,056 INFO L78 Accepts]: Start accepts. Automaton has 38819 states and 115151 transitions. Word has length 25 [2021-04-15 02:26:00,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:00,057 INFO L480 AbstractCegarLoop]: Abstraction has 38819 states and 115151 transitions. [2021-04-15 02:26:00,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:00,057 INFO L276 IsEmpty]: Start isEmpty. Operand 38819 states and 115151 transitions. [2021-04-15 02:26:00,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:26:00,104 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:00,104 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:00,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21812 [2021-04-15 02:26:00,305 INFO L428 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:00,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:00,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1930224374, now seen corresponding path program 420 times [2021-04-15 02:26:00,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:00,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138151072] [2021-04-15 02:26:00,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:00,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:00,392 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:00,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138151072] [2021-04-15 02:26:00,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700559301] [2021-04-15 02:26:00,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:00,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:26:00,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:00,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:26:00,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:00,478 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:00,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:00,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:26:00,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276527914] [2021-04-15 02:26:00,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:26:00,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:00,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:26:00,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:26:00,479 INFO L87 Difference]: Start difference. First operand 38819 states and 115151 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:00,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:00,768 INFO L93 Difference]: Finished difference Result 42306 states and 124008 transitions. [2021-04-15 02:26:00,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:26:00,769 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:26:00,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:00,877 INFO L225 Difference]: With dead ends: 42306 [2021-04-15 02:26:00,877 INFO L226 Difference]: Without dead ends: 42306 [2021-04-15 02:26:00,877 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 118.9ms TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:26:00,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42306 states. [2021-04-15 02:26:01,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42306 to 38691. [2021-04-15 02:26:01,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38691 states, 38690 states have (on average 2.9641509433962265) internal successors, (114683), 38690 states have internal predecessors, (114683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:01,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38691 states to 38691 states and 114683 transitions. [2021-04-15 02:26:01,885 INFO L78 Accepts]: Start accepts. Automaton has 38691 states and 114683 transitions. Word has length 25 [2021-04-15 02:26:01,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:01,885 INFO L480 AbstractCegarLoop]: Abstraction has 38691 states and 114683 transitions. [2021-04-15 02:26:01,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:01,886 INFO L276 IsEmpty]: Start isEmpty. Operand 38691 states and 114683 transitions. [2021-04-15 02:26:01,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:26:01,937 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:01,937 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:02,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21813,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:02,137 INFO L428 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:02,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:02,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1392368796, now seen corresponding path program 421 times [2021-04-15 02:26:02,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:02,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363824554] [2021-04-15 02:26:02,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:02,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:02,258 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:02,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363824554] [2021-04-15 02:26:02,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190229747] [2021-04-15 02:26:02,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:02,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:02,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:26:02,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:02,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:02,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:26:02,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808896327] [2021-04-15 02:26:02,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:26:02,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:02,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:26:02,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:26:02,363 INFO L87 Difference]: Start difference. First operand 38691 states and 114683 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:03,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:03,039 INFO L93 Difference]: Finished difference Result 55502 states and 163268 transitions. [2021-04-15 02:26:03,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:26:03,040 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:26:03,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:03,187 INFO L225 Difference]: With dead ends: 55502 [2021-04-15 02:26:03,187 INFO L226 Difference]: Without dead ends: 55502 [2021-04-15 02:26:03,187 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 214.0ms TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:26:03,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55502 states. [2021-04-15 02:26:04,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55502 to 48558. [2021-04-15 02:26:04,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48558 states, 48557 states have (on average 2.977016702020306) internal successors, (144555), 48557 states have internal predecessors, (144555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:04,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48558 states to 48558 states and 144555 transitions. [2021-04-15 02:26:04,349 INFO L78 Accepts]: Start accepts. Automaton has 48558 states and 144555 transitions. Word has length 25 [2021-04-15 02:26:04,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:04,350 INFO L480 AbstractCegarLoop]: Abstraction has 48558 states and 144555 transitions. [2021-04-15 02:26:04,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:04,350 INFO L276 IsEmpty]: Start isEmpty. Operand 48558 states and 144555 transitions. [2021-04-15 02:26:04,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:26:04,393 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:04,393 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:04,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21814 [2021-04-15 02:26:04,594 INFO L428 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:04,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:04,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1145753042, now seen corresponding path program 422 times [2021-04-15 02:26:04,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:04,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104473663] [2021-04-15 02:26:04,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:04,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:04,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104473663] [2021-04-15 02:26:04,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375352390] [2021-04-15 02:26:04,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:04,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:26:04,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:04,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:26:04,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:04,811 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:04,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:04,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-04-15 02:26:04,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849800362] [2021-04-15 02:26:04,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:26:04,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:04,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:26:04,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:26:04,812 INFO L87 Difference]: Start difference. First operand 48558 states and 144555 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:05,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:05,278 INFO L93 Difference]: Finished difference Result 55938 states and 164755 transitions. [2021-04-15 02:26:05,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:26:05,279 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:26:05,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:05,425 INFO L225 Difference]: With dead ends: 55938 [2021-04-15 02:26:05,425 INFO L226 Difference]: Without dead ends: 55938 [2021-04-15 02:26:05,425 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 206.2ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:26:05,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55938 states. [2021-04-15 02:26:06,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55938 to 38647. [2021-04-15 02:26:06,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38647 states, 38646 states have (on average 2.965714433576567) internal successors, (114613), 38646 states have internal predecessors, (114613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:06,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38647 states to 38647 states and 114613 transitions. [2021-04-15 02:26:06,734 INFO L78 Accepts]: Start accepts. Automaton has 38647 states and 114613 transitions. Word has length 25 [2021-04-15 02:26:06,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:06,734 INFO L480 AbstractCegarLoop]: Abstraction has 38647 states and 114613 transitions. [2021-04-15 02:26:06,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:06,734 INFO L276 IsEmpty]: Start isEmpty. Operand 38647 states and 114613 transitions. [2021-04-15 02:26:06,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:26:06,788 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:06,788 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:06,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21815,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:06,988 INFO L428 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:06,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:06,989 INFO L82 PathProgramCache]: Analyzing trace with hash -131776818, now seen corresponding path program 423 times [2021-04-15 02:26:06,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:06,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386458329] [2021-04-15 02:26:06,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:06,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:07,083 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 41 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:07,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386458329] [2021-04-15 02:26:07,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95763857] [2021-04-15 02:26:07,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:07,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-04-15 02:26:07,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:07,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:26:07,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:07,173 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 45 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:07,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:07,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:26:07,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927599095] [2021-04-15 02:26:07,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:26:07,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:07,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:26:07,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:26:07,174 INFO L87 Difference]: Start difference. First operand 38647 states and 114613 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:07,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:07,600 INFO L93 Difference]: Finished difference Result 39269 states and 115484 transitions. [2021-04-15 02:26:07,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:26:07,601 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:26:07,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:07,696 INFO L225 Difference]: With dead ends: 39269 [2021-04-15 02:26:07,696 INFO L226 Difference]: Without dead ends: 39265 [2021-04-15 02:26:07,696 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 203.3ms TimeCoverageRelationStatistics Valid=243, Invalid=407, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:26:07,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39265 states. [2021-04-15 02:26:08,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39265 to 38661. [2021-04-15 02:26:08,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38661 states, 38660 states have (on average 2.9655975168132436) internal successors, (114650), 38660 states have internal predecessors, (114650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:08,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38661 states to 38661 states and 114650 transitions. [2021-04-15 02:26:08,613 INFO L78 Accepts]: Start accepts. Automaton has 38661 states and 114650 transitions. Word has length 25 [2021-04-15 02:26:08,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:08,613 INFO L480 AbstractCegarLoop]: Abstraction has 38661 states and 114650 transitions. [2021-04-15 02:26:08,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:08,614 INFO L276 IsEmpty]: Start isEmpty. Operand 38661 states and 114650 transitions. [2021-04-15 02:26:08,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:26:08,648 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:08,648 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:08,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21816,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:08,848 INFO L428 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:08,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:08,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1585972242, now seen corresponding path program 424 times [2021-04-15 02:26:08,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:08,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363617471] [2021-04-15 02:26:08,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:08,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:08,941 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:08,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363617471] [2021-04-15 02:26:08,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177904226] [2021-04-15 02:26:08,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:08,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:26:08,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:08,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:26:08,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 43 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:09,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:09,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:26:09,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315458300] [2021-04-15 02:26:09,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:26:09,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:09,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:26:09,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:26:09,037 INFO L87 Difference]: Start difference. First operand 38661 states and 114650 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:09,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:09,314 INFO L93 Difference]: Finished difference Result 41548 states and 121884 transitions. [2021-04-15 02:26:09,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:26:09,315 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:26:09,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:09,399 INFO L225 Difference]: With dead ends: 41548 [2021-04-15 02:26:09,399 INFO L226 Difference]: Without dead ends: 41548 [2021-04-15 02:26:09,399 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=131, Invalid=175, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:26:09,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41548 states. [2021-04-15 02:26:10,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41548 to 38678. [2021-04-15 02:26:10,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38678 states, 38677 states have (on average 2.9651989554515605) internal successors, (114685), 38677 states have internal predecessors, (114685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:10,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38678 states to 38678 states and 114685 transitions. [2021-04-15 02:26:10,461 INFO L78 Accepts]: Start accepts. Automaton has 38678 states and 114685 transitions. Word has length 25 [2021-04-15 02:26:10,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:10,461 INFO L480 AbstractCegarLoop]: Abstraction has 38678 states and 114685 transitions. [2021-04-15 02:26:10,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:10,461 INFO L276 IsEmpty]: Start isEmpty. Operand 38678 states and 114685 transitions. [2021-04-15 02:26:10,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:26:10,515 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:10,515 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:10,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21817,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:10,715 INFO L428 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:10,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:10,715 INFO L82 PathProgramCache]: Analyzing trace with hash -143075092, now seen corresponding path program 425 times [2021-04-15 02:26:10,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:10,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797790575] [2021-04-15 02:26:10,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:10,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:10,820 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:10,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797790575] [2021-04-15 02:26:10,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521016912] [2021-04-15 02:26:10,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:10,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-04-15 02:26:10,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:10,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:26:10,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:10,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:10,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:26:10,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418570792] [2021-04-15 02:26:10,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:26:10,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:10,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:26:10,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:26:10,927 INFO L87 Difference]: Start difference. First operand 38678 states and 114685 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:11,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:11,394 INFO L93 Difference]: Finished difference Result 41975 states and 123155 transitions. [2021-04-15 02:26:11,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:26:11,395 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:26:11,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:11,494 INFO L225 Difference]: With dead ends: 41975 [2021-04-15 02:26:11,495 INFO L226 Difference]: Without dead ends: 41975 [2021-04-15 02:26:11,495 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 134.5ms TimeCoverageRelationStatistics Valid=152, Invalid=228, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:26:11,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41975 states. [2021-04-15 02:26:12,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41975 to 38672. [2021-04-15 02:26:12,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38672 states, 38671 states have (on average 2.9648832458431382) internal successors, (114655), 38671 states have internal predecessors, (114655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:12,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38672 states to 38672 states and 114655 transitions. [2021-04-15 02:26:12,278 INFO L78 Accepts]: Start accepts. Automaton has 38672 states and 114655 transitions. Word has length 25 [2021-04-15 02:26:12,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:12,278 INFO L480 AbstractCegarLoop]: Abstraction has 38672 states and 114655 transitions. [2021-04-15 02:26:12,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:12,279 INFO L276 IsEmpty]: Start isEmpty. Operand 38672 states and 114655 transitions. [2021-04-15 02:26:12,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:26:12,316 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:12,316 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:12,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21818,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:12,516 INFO L428 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:12,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:12,517 INFO L82 PathProgramCache]: Analyzing trace with hash 2091032402, now seen corresponding path program 426 times [2021-04-15 02:26:12,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:12,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377604306] [2021-04-15 02:26:12,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:12,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377604306] [2021-04-15 02:26:12,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961774349] [2021-04-15 02:26:12,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:12,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-04-15 02:26:12,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:12,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:26:12,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:12,808 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-04-15 02:26:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:12,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:12,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:26:12,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202844834] [2021-04-15 02:26:12,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:26:12,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:12,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:26:12,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:26:12,854 INFO L87 Difference]: Start difference. First operand 38672 states and 114655 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:13,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:13,159 INFO L93 Difference]: Finished difference Result 60964 states and 181254 transitions. [2021-04-15 02:26:13,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:26:13,159 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:26:13,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:13,341 INFO L225 Difference]: With dead ends: 60964 [2021-04-15 02:26:13,341 INFO L226 Difference]: Without dead ends: 60964 [2021-04-15 02:26:13,341 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 95.1ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:26:13,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60964 states. [2021-04-15 02:26:14,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60964 to 60066. [2021-04-15 02:26:14,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60066 states, 60065 states have (on average 2.996270706734371) internal successors, (179971), 60065 states have internal predecessors, (179971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:14,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60066 states to 60066 states and 179971 transitions. [2021-04-15 02:26:14,927 INFO L78 Accepts]: Start accepts. Automaton has 60066 states and 179971 transitions. Word has length 25 [2021-04-15 02:26:14,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:14,927 INFO L480 AbstractCegarLoop]: Abstraction has 60066 states and 179971 transitions. [2021-04-15 02:26:14,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:14,927 INFO L276 IsEmpty]: Start isEmpty. Operand 60066 states and 179971 transitions. [2021-04-15 02:26:14,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:26:14,995 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:14,995 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:15,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21819,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:15,196 INFO L428 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:15,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:15,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1666079316, now seen corresponding path program 427 times [2021-04-15 02:26:15,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:15,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661293748] [2021-04-15 02:26:15,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:15,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:15,320 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:15,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661293748] [2021-04-15 02:26:15,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495014930] [2021-04-15 02:26:15,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:15,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:26:15,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:15,416 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:15,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:15,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-04-15 02:26:15,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973603813] [2021-04-15 02:26:15,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:26:15,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:15,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:26:15,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:26:15,417 INFO L87 Difference]: Start difference. First operand 60066 states and 179971 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:15,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:15,885 INFO L93 Difference]: Finished difference Result 63184 states and 187571 transitions. [2021-04-15 02:26:15,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:26:15,886 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:26:15,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:16,068 INFO L225 Difference]: With dead ends: 63184 [2021-04-15 02:26:16,068 INFO L226 Difference]: Without dead ends: 63184 [2021-04-15 02:26:16,069 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 186.9ms TimeCoverageRelationStatistics Valid=201, Invalid=351, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:26:16,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63184 states. [2021-04-15 02:26:17,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63184 to 59924. [2021-04-15 02:26:17,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59924 states, 59923 states have (on average 2.995427465247067) internal successors, (179495), 59923 states have internal predecessors, (179495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:17,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59924 states to 59924 states and 179495 transitions. [2021-04-15 02:26:17,699 INFO L78 Accepts]: Start accepts. Automaton has 59924 states and 179495 transitions. Word has length 25 [2021-04-15 02:26:17,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:17,699 INFO L480 AbstractCegarLoop]: Abstraction has 59924 states and 179495 transitions. [2021-04-15 02:26:17,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:17,700 INFO L276 IsEmpty]: Start isEmpty. Operand 59924 states and 179495 transitions. [2021-04-15 02:26:17,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:26:17,765 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:17,765 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:17,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21820 [2021-04-15 02:26:17,966 INFO L428 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:17,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:17,966 INFO L82 PathProgramCache]: Analyzing trace with hash 2122541714, now seen corresponding path program 428 times [2021-04-15 02:26:17,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:17,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737081697] [2021-04-15 02:26:17,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:18,096 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:18,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737081697] [2021-04-15 02:26:18,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990171011] [2021-04-15 02:26:18,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:18,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:26:18,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:18,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:26:18,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:18,185 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:18,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:18,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-04-15 02:26:18,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976490811] [2021-04-15 02:26:18,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:26:18,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:18,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:26:18,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:26:18,186 INFO L87 Difference]: Start difference. First operand 59924 states and 179495 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:18,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:18,835 INFO L93 Difference]: Finished difference Result 90970 states and 272969 transitions. [2021-04-15 02:26:18,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:26:18,836 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:26:18,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:19,087 INFO L225 Difference]: With dead ends: 90970 [2021-04-15 02:26:19,088 INFO L226 Difference]: Without dead ends: 90970 [2021-04-15 02:26:19,088 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 260.5ms TimeCoverageRelationStatistics Valid=311, Invalid=559, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:26:19,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90970 states. [2021-04-15 02:26:21,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90970 to 87092. [2021-04-15 02:26:21,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87092 states, 87091 states have (on average 3.022287033103306) internal successors, (263214), 87091 states have internal predecessors, (263214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:21,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87092 states to 87092 states and 263214 transitions. [2021-04-15 02:26:21,523 INFO L78 Accepts]: Start accepts. Automaton has 87092 states and 263214 transitions. Word has length 25 [2021-04-15 02:26:21,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:21,523 INFO L480 AbstractCegarLoop]: Abstraction has 87092 states and 263214 transitions. [2021-04-15 02:26:21,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:21,523 INFO L276 IsEmpty]: Start isEmpty. Operand 87092 states and 263214 transitions. [2021-04-15 02:26:21,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:26:21,593 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:21,593 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:21,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21821 [2021-04-15 02:26:21,793 INFO L428 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:21,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:21,793 INFO L82 PathProgramCache]: Analyzing trace with hash -195102390, now seen corresponding path program 429 times [2021-04-15 02:26:21,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:21,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505623177] [2021-04-15 02:26:21,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:21,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:21,904 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:21,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505623177] [2021-04-15 02:26:21,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313050244] [2021-04-15 02:26:21,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:21,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-04-15 02:26:21,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:21,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:26:21,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:22,007 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 37 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:22,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:22,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:26:22,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567215725] [2021-04-15 02:26:22,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:26:22,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:22,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:26:22,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:26:22,008 INFO L87 Difference]: Start difference. First operand 87092 states and 263214 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:22,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:22,515 INFO L93 Difference]: Finished difference Result 87908 states and 264688 transitions. [2021-04-15 02:26:22,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:26:22,516 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:26:22,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:22,782 INFO L225 Difference]: With dead ends: 87908 [2021-04-15 02:26:22,782 INFO L226 Difference]: Without dead ends: 87908 [2021-04-15 02:26:22,782 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:26:22,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87908 states. [2021-04-15 02:26:25,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87908 to 87088. [2021-04-15 02:26:25,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87088 states, 87087 states have (on average 3.0224832638625743) internal successors, (263219), 87087 states have internal predecessors, (263219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:25,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87088 states to 87088 states and 263219 transitions. [2021-04-15 02:26:25,410 INFO L78 Accepts]: Start accepts. Automaton has 87088 states and 263219 transitions. Word has length 25 [2021-04-15 02:26:25,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:25,411 INFO L480 AbstractCegarLoop]: Abstraction has 87088 states and 263219 transitions. [2021-04-15 02:26:25,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:25,411 INFO L276 IsEmpty]: Start isEmpty. Operand 87088 states and 263219 transitions. [2021-04-15 02:26:25,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:26:25,492 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:25,492 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:25,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21822 [2021-04-15 02:26:25,692 INFO L428 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:25,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:25,693 INFO L82 PathProgramCache]: Analyzing trace with hash 342753188, now seen corresponding path program 430 times [2021-04-15 02:26:25,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:25,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126752191] [2021-04-15 02:26:25,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:25,780 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:25,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126752191] [2021-04-15 02:26:25,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085511254] [2021-04-15 02:26:25,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:25,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:26:25,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:25,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:26:25,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:25,860 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:25,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:25,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-04-15 02:26:25,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970199200] [2021-04-15 02:26:25,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:26:25,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:25,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:26:25,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:26:25,861 INFO L87 Difference]: Start difference. First operand 87088 states and 263219 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:26,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:26,346 INFO L93 Difference]: Finished difference Result 94912 states and 285142 transitions. [2021-04-15 02:26:26,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:26:26,347 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:26:26,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:27,124 INFO L225 Difference]: With dead ends: 94912 [2021-04-15 02:26:27,125 INFO L226 Difference]: Without dead ends: 94912 [2021-04-15 02:26:27,125 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 130.8ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:26:27,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94912 states. [2021-04-15 02:26:28,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94912 to 56562. [2021-04-15 02:26:28,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56562 states, 56561 states have (on average 2.9879068616184297) internal successors, (168999), 56561 states have internal predecessors, (168999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:29,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56562 states to 56562 states and 168999 transitions. [2021-04-15 02:26:29,116 INFO L78 Accepts]: Start accepts. Automaton has 56562 states and 168999 transitions. Word has length 25 [2021-04-15 02:26:29,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:29,116 INFO L480 AbstractCegarLoop]: Abstraction has 56562 states and 168999 transitions. [2021-04-15 02:26:29,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:29,116 INFO L276 IsEmpty]: Start isEmpty. Operand 56562 states and 168999 transitions. [2021-04-15 02:26:29,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:26:29,178 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:29,178 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:29,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21823,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:29,378 INFO L428 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:29,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:29,379 INFO L82 PathProgramCache]: Analyzing trace with hash -163593078, now seen corresponding path program 431 times [2021-04-15 02:26:29,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:29,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670710367] [2021-04-15 02:26:29,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:29,469 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:29,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670710367] [2021-04-15 02:26:29,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212381587] [2021-04-15 02:26:29,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:29,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-04-15 02:26:29,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:29,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:26:29,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:29,551 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:29,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:29,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-04-15 02:26:29,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670662183] [2021-04-15 02:26:29,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:26:29,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:29,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:26:29,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:26:29,552 INFO L87 Difference]: Start difference. First operand 56562 states and 168999 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:29,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:29,982 INFO L93 Difference]: Finished difference Result 78230 states and 232047 transitions. [2021-04-15 02:26:29,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:26:29,983 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:26:29,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:30,158 INFO L225 Difference]: With dead ends: 78230 [2021-04-15 02:26:30,158 INFO L226 Difference]: Without dead ends: 78230 [2021-04-15 02:26:30,159 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 185.5ms TimeCoverageRelationStatistics Valid=310, Invalid=560, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:26:30,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78230 states. [2021-04-15 02:26:31,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78230 to 47991. [2021-04-15 02:26:31,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47991 states, 47990 states have (on average 2.974286309647843) internal successors, (142736), 47990 states have internal predecessors, (142736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:32,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47991 states to 47991 states and 142736 transitions. [2021-04-15 02:26:32,187 INFO L78 Accepts]: Start accepts. Automaton has 47991 states and 142736 transitions. Word has length 25 [2021-04-15 02:26:32,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:32,187 INFO L480 AbstractCegarLoop]: Abstraction has 47991 states and 142736 transitions. [2021-04-15 02:26:32,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:32,187 INFO L276 IsEmpty]: Start isEmpty. Operand 47991 states and 142736 transitions. [2021-04-15 02:26:32,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:26:32,249 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:32,249 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:32,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21824,433 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:32,450 INFO L428 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:32,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:32,450 INFO L82 PathProgramCache]: Analyzing trace with hash 76191076, now seen corresponding path program 432 times [2021-04-15 02:26:32,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:32,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845327323] [2021-04-15 02:26:32,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:32,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:32,539 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:26:32,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845327323] [2021-04-15 02:26:32,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764102804] [2021-04-15 02:26:32,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:32,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-04-15 02:26:32,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:32,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:26:32,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:32,632 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 37 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:26:32,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:32,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:26:32,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557054785] [2021-04-15 02:26:32,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:26:32,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:32,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:26:32,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:26:32,633 INFO L87 Difference]: Start difference. First operand 47991 states and 142736 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:33,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:33,080 INFO L93 Difference]: Finished difference Result 48514 states and 143403 transitions. [2021-04-15 02:26:33,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:26:33,081 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:26:33,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:33,198 INFO L225 Difference]: With dead ends: 48514 [2021-04-15 02:26:33,198 INFO L226 Difference]: Without dead ends: 48510 [2021-04-15 02:26:33,198 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 195.6ms TimeCoverageRelationStatistics Valid=212, Invalid=388, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:26:33,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48510 states. [2021-04-15 02:26:34,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48510 to 47991. [2021-04-15 02:26:34,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47991 states, 47990 states have (on average 2.9742029589497814) internal successors, (142732), 47990 states have internal predecessors, (142732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:34,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47991 states to 47991 states and 142732 transitions. [2021-04-15 02:26:34,283 INFO L78 Accepts]: Start accepts. Automaton has 47991 states and 142732 transitions. Word has length 25 [2021-04-15 02:26:34,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:34,283 INFO L480 AbstractCegarLoop]: Abstraction has 47991 states and 142732 transitions. [2021-04-15 02:26:34,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:34,283 INFO L276 IsEmpty]: Start isEmpty. Operand 47991 states and 142732 transitions. [2021-04-15 02:26:34,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:26:34,349 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:34,349 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:34,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21825,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:34,550 INFO L428 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:34,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:34,550 INFO L82 PathProgramCache]: Analyzing trace with hash -800059932, now seen corresponding path program 433 times [2021-04-15 02:26:34,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:34,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648686870] [2021-04-15 02:26:34,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:34,686 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:34,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648686870] [2021-04-15 02:26:34,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994702428] [2021-04-15 02:26:34,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:34,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:26:34,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:34,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:34,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-04-15 02:26:34,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719142029] [2021-04-15 02:26:34,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:26:34,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:34,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:26:34,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:26:34,795 INFO L87 Difference]: Start difference. First operand 47991 states and 142732 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:35,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:35,285 INFO L93 Difference]: Finished difference Result 56834 states and 167301 transitions. [2021-04-15 02:26:35,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:26:35,286 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:26:35,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:35,451 INFO L225 Difference]: With dead ends: 56834 [2021-04-15 02:26:35,451 INFO L226 Difference]: Without dead ends: 56834 [2021-04-15 02:26:35,451 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 266.3ms TimeCoverageRelationStatistics Valid=313, Invalid=557, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:26:35,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56834 states. [2021-04-15 02:26:36,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56834 to 38382. [2021-04-15 02:26:36,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38382 states, 38381 states have (on average 2.965660092233136) internal successors, (113825), 38381 states have internal predecessors, (113825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:36,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38382 states to 38382 states and 113825 transitions. [2021-04-15 02:26:36,707 INFO L78 Accepts]: Start accepts. Automaton has 38382 states and 113825 transitions. Word has length 25 [2021-04-15 02:26:36,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:36,707 INFO L480 AbstractCegarLoop]: Abstraction has 38382 states and 113825 transitions. [2021-04-15 02:26:36,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:36,707 INFO L276 IsEmpty]: Start isEmpty. Operand 38382 states and 113825 transitions. [2021-04-15 02:26:36,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:26:36,760 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:36,760 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:36,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21826,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:36,961 INFO L428 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:36,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:36,961 INFO L82 PathProgramCache]: Analyzing trace with hash -26868346, now seen corresponding path program 434 times [2021-04-15 02:26:36,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:36,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778694602] [2021-04-15 02:26:36,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:36,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:37,058 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:37,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778694602] [2021-04-15 02:26:37,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545753514] [2021-04-15 02:26:37,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:37,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:26:37,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:37,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:26:37,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:37,149 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 45 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:37,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:37,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:26:37,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922519361] [2021-04-15 02:26:37,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:26:37,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:37,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:26:37,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:26:37,150 INFO L87 Difference]: Start difference. First operand 38382 states and 113825 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:37,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:37,543 INFO L93 Difference]: Finished difference Result 38968 states and 114634 transitions. [2021-04-15 02:26:37,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:26:37,543 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:26:37,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:37,603 INFO L225 Difference]: With dead ends: 38968 [2021-04-15 02:26:37,603 INFO L226 Difference]: Without dead ends: 38964 [2021-04-15 02:26:37,603 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 195.4ms TimeCoverageRelationStatistics Valid=242, Invalid=408, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:26:37,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38964 states. [2021-04-15 02:26:38,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38964 to 38396. [2021-04-15 02:26:38,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38396 states, 38395 states have (on average 2.9655684333897643) internal successors, (113863), 38395 states have internal predecessors, (113863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:38,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38396 states to 38396 states and 113863 transitions. [2021-04-15 02:26:38,375 INFO L78 Accepts]: Start accepts. Automaton has 38396 states and 113863 transitions. Word has length 25 [2021-04-15 02:26:38,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:38,375 INFO L480 AbstractCegarLoop]: Abstraction has 38396 states and 113863 transitions. [2021-04-15 02:26:38,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:38,375 INFO L276 IsEmpty]: Start isEmpty. Operand 38396 states and 113863 transitions. [2021-04-15 02:26:38,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:26:38,422 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:38,422 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:38,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21827,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:38,623 INFO L428 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:38,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:38,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1690880714, now seen corresponding path program 435 times [2021-04-15 02:26:38,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:38,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098979162] [2021-04-15 02:26:38,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:38,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:38,716 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:38,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098979162] [2021-04-15 02:26:38,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342143916] [2021-04-15 02:26:38,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:38,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-04-15 02:26:38,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:38,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:26:38,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:38,817 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 44 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:38,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:38,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:26:38,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072570665] [2021-04-15 02:26:38,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:26:38,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:38,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:26:38,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:26:38,818 INFO L87 Difference]: Start difference. First operand 38396 states and 113863 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:39,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:39,076 INFO L93 Difference]: Finished difference Result 41573 states and 121933 transitions. [2021-04-15 02:26:39,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:26:39,077 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:26:39,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:39,141 INFO L225 Difference]: With dead ends: 41573 [2021-04-15 02:26:39,141 INFO L226 Difference]: Without dead ends: 41573 [2021-04-15 02:26:39,141 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 120.6ms TimeCoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:26:39,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41573 states. [2021-04-15 02:26:39,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41573 to 38413. [2021-04-15 02:26:39,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38413 states, 38412 states have (on average 2.9653493699885454) internal successors, (113905), 38412 states have internal predecessors, (113905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:39,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38413 states to 38413 states and 113905 transitions. [2021-04-15 02:26:39,912 INFO L78 Accepts]: Start accepts. Automaton has 38413 states and 113905 transitions. Word has length 25 [2021-04-15 02:26:39,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:39,912 INFO L480 AbstractCegarLoop]: Abstraction has 38413 states and 113905 transitions. [2021-04-15 02:26:39,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:39,912 INFO L276 IsEmpty]: Start isEmpty. Operand 38413 states and 113905 transitions. [2021-04-15 02:26:39,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:26:39,953 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:39,953 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:40,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21828,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:40,154 INFO L428 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:40,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:40,154 INFO L82 PathProgramCache]: Analyzing trace with hash -38166620, now seen corresponding path program 436 times [2021-04-15 02:26:40,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:40,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234835027] [2021-04-15 02:26:40,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:40,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234835027] [2021-04-15 02:26:40,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30481616] [2021-04-15 02:26:40,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:40,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:26:40,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:40,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:26:40,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:40,328 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:40,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:40,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:26:40,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551517269] [2021-04-15 02:26:40,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:26:40,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:40,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:26:40,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:26:40,329 INFO L87 Difference]: Start difference. First operand 38413 states and 113905 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:40,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:40,585 INFO L93 Difference]: Finished difference Result 43427 states and 127338 transitions. [2021-04-15 02:26:40,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:26:40,586 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:26:40,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:40,669 INFO L225 Difference]: With dead ends: 43427 [2021-04-15 02:26:40,669 INFO L226 Difference]: Without dead ends: 43427 [2021-04-15 02:26:40,669 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 123.2ms TimeCoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:26:40,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43427 states. [2021-04-15 02:26:41,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43427 to 38418. [2021-04-15 02:26:41,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38418 states, 38417 states have (on average 2.965197698935367) internal successors, (113914), 38417 states have internal predecessors, (113914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:41,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38418 states to 38418 states and 113914 transitions. [2021-04-15 02:26:41,556 INFO L78 Accepts]: Start accepts. Automaton has 38418 states and 113914 transitions. Word has length 25 [2021-04-15 02:26:41,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:41,556 INFO L480 AbstractCegarLoop]: Abstraction has 38418 states and 113914 transitions. [2021-04-15 02:26:41,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:41,556 INFO L276 IsEmpty]: Start isEmpty. Operand 38418 states and 113914 transitions. [2021-04-15 02:26:41,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:26:41,596 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:41,596 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:41,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21829,438 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:41,796 INFO L428 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:41,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:41,796 INFO L82 PathProgramCache]: Analyzing trace with hash -2099026422, now seen corresponding path program 437 times [2021-04-15 02:26:41,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:41,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476243789] [2021-04-15 02:26:41,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:41,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476243789] [2021-04-15 02:26:41,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286179410] [2021-04-15 02:26:41,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:41,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-04-15 02:26:41,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:41,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:26:41,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:41,976 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:41,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:41,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:26:41,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831666773] [2021-04-15 02:26:41,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:26:41,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:41,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:26:41,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:26:41,977 INFO L87 Difference]: Start difference. First operand 38418 states and 113914 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:42,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:42,235 INFO L93 Difference]: Finished difference Result 42897 states and 125903 transitions. [2021-04-15 02:26:42,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:26:42,236 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:26:42,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:42,313 INFO L225 Difference]: With dead ends: 42897 [2021-04-15 02:26:42,313 INFO L226 Difference]: Without dead ends: 42897 [2021-04-15 02:26:42,313 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=191, Invalid=315, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:26:42,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42897 states. [2021-04-15 02:26:43,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42897 to 38354. [2021-04-15 02:26:43,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38354 states, 38353 states have (on average 2.964644226005788) internal successors, (113703), 38353 states have internal predecessors, (113703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:43,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38354 states to 38354 states and 113703 transitions. [2021-04-15 02:26:43,186 INFO L78 Accepts]: Start accepts. Automaton has 38354 states and 113703 transitions. Word has length 25 [2021-04-15 02:26:43,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:43,186 INFO L480 AbstractCegarLoop]: Abstraction has 38354 states and 113703 transitions. [2021-04-15 02:26:43,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:43,186 INFO L276 IsEmpty]: Start isEmpty. Operand 38354 states and 113703 transitions. [2021-04-15 02:26:43,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:26:43,227 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:43,227 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:43,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21830,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:43,428 INFO L428 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:43,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:43,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1561170844, now seen corresponding path program 438 times [2021-04-15 02:26:43,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:43,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204440675] [2021-04-15 02:26:43,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:43,510 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:43,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204440675] [2021-04-15 02:26:43,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456743201] [2021-04-15 02:26:43,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:43,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-04-15 02:26:43,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:43,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:26:43,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:43,602 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:43,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:43,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:26:43,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745624042] [2021-04-15 02:26:43,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:26:43,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:43,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:26:43,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:26:43,603 INFO L87 Difference]: Start difference. First operand 38354 states and 113703 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:43,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:43,895 INFO L93 Difference]: Finished difference Result 63716 states and 189177 transitions. [2021-04-15 02:26:43,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:26:43,895 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:26:43,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:44,016 INFO L225 Difference]: With dead ends: 63716 [2021-04-15 02:26:44,016 INFO L226 Difference]: Without dead ends: 63716 [2021-04-15 02:26:44,016 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:26:44,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63716 states. [2021-04-15 02:26:45,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63716 to 58655. [2021-04-15 02:26:45,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58655 states, 58654 states have (on average 2.9932314931632966) internal successors, (175565), 58654 states have internal predecessors, (175565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:45,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58655 states to 58655 states and 175565 transitions. [2021-04-15 02:26:45,603 INFO L78 Accepts]: Start accepts. Automaton has 58655 states and 175565 transitions. Word has length 25 [2021-04-15 02:26:45,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:45,603 INFO L480 AbstractCegarLoop]: Abstraction has 58655 states and 175565 transitions. [2021-04-15 02:26:45,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:45,603 INFO L276 IsEmpty]: Start isEmpty. Operand 58655 states and 175565 transitions. [2021-04-15 02:26:45,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:26:45,649 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:45,649 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:45,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21831,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:45,849 INFO L428 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:45,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:45,850 INFO L82 PathProgramCache]: Analyzing trace with hash -2067517110, now seen corresponding path program 439 times [2021-04-15 02:26:45,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:45,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063724313] [2021-04-15 02:26:45,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:45,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:45,947 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:45,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063724313] [2021-04-15 02:26:45,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810337940] [2021-04-15 02:26:45,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:45,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:45,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:26:45,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:46,037 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:46,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:46,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-04-15 02:26:46,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108044120] [2021-04-15 02:26:46,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:26:46,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:46,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:26:46,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:26:46,038 INFO L87 Difference]: Start difference. First operand 58655 states and 175565 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:46,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:46,419 INFO L93 Difference]: Finished difference Result 65878 states and 195353 transitions. [2021-04-15 02:26:46,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:26:46,419 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:26:46,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:46,558 INFO L225 Difference]: With dead ends: 65878 [2021-04-15 02:26:46,558 INFO L226 Difference]: Without dead ends: 65878 [2021-04-15 02:26:46,558 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 169.1ms TimeCoverageRelationStatistics Valid=247, Invalid=455, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:26:46,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65878 states. [2021-04-15 02:26:47,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65878 to 58492. [2021-04-15 02:26:47,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58492 states, 58491 states have (on average 2.992528765109162) internal successors, (175036), 58491 states have internal predecessors, (175036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:47,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58492 states to 58492 states and 175036 transitions. [2021-04-15 02:26:47,836 INFO L78 Accepts]: Start accepts. Automaton has 58492 states and 175036 transitions. Word has length 25 [2021-04-15 02:26:47,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:47,836 INFO L480 AbstractCegarLoop]: Abstraction has 58492 states and 175036 transitions. [2021-04-15 02:26:47,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:47,836 INFO L276 IsEmpty]: Start isEmpty. Operand 58492 states and 175036 transitions. [2021-04-15 02:26:47,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:26:47,883 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:47,883 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:48,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21832 [2021-04-15 02:26:48,084 INFO L428 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:48,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:48,084 INFO L82 PathProgramCache]: Analyzing trace with hash -584382172, now seen corresponding path program 440 times [2021-04-15 02:26:48,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:48,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662159057] [2021-04-15 02:26:48,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:48,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662159057] [2021-04-15 02:26:48,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263579489] [2021-04-15 02:26:48,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:48,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:26:48,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:48,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:26:48,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:48,268 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:48,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:48,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-04-15 02:26:48,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840920971] [2021-04-15 02:26:48,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:26:48,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:48,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:26:48,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:26:48,269 INFO L87 Difference]: Start difference. First operand 58492 states and 175036 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:49,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:49,069 INFO L93 Difference]: Finished difference Result 92257 states and 276233 transitions. [2021-04-15 02:26:49,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:26:49,070 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:26:49,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:49,250 INFO L225 Difference]: With dead ends: 92257 [2021-04-15 02:26:49,250 INFO L226 Difference]: Without dead ends: 92257 [2021-04-15 02:26:49,251 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 270.8ms TimeCoverageRelationStatistics Valid=418, Invalid=772, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:26:49,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92257 states. [2021-04-15 02:26:50,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92257 to 82743. [2021-04-15 02:26:50,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82743 states, 82742 states have (on average 3.0198569045950063) internal successors, (249869), 82742 states have internal predecessors, (249869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:50,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82743 states to 82743 states and 249869 transitions. [2021-04-15 02:26:50,883 INFO L78 Accepts]: Start accepts. Automaton has 82743 states and 249869 transitions. Word has length 25 [2021-04-15 02:26:50,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:50,883 INFO L480 AbstractCegarLoop]: Abstraction has 82743 states and 249869 transitions. [2021-04-15 02:26:50,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:50,883 INFO L276 IsEmpty]: Start isEmpty. Operand 82743 states and 249869 transitions. [2021-04-15 02:26:50,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:26:50,949 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:50,949 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:51,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21833,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:51,149 INFO L428 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:51,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:51,149 INFO L82 PathProgramCache]: Analyzing trace with hash 583094636, now seen corresponding path program 441 times [2021-04-15 02:26:51,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:51,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759270406] [2021-04-15 02:26:51,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:51,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759270406] [2021-04-15 02:26:51,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186090274] [2021-04-15 02:26:51,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:51,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-04-15 02:26:51,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:51,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:26:51,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:51,324 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:51,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:51,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-04-15 02:26:51,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954566262] [2021-04-15 02:26:51,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:26:51,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:51,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:26:51,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:26:51,325 INFO L87 Difference]: Start difference. First operand 82743 states and 249869 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:52,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:52,017 INFO L93 Difference]: Finished difference Result 83322 states and 250595 transitions. [2021-04-15 02:26:52,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:26:52,018 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:26:52,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:52,159 INFO L225 Difference]: With dead ends: 83322 [2021-04-15 02:26:52,159 INFO L226 Difference]: Without dead ends: 83321 [2021-04-15 02:26:52,159 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:26:52,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83321 states. [2021-04-15 02:26:53,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83321 to 82266. [2021-04-15 02:26:53,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82266 states, 82265 states have (on average 3.0184768735185075) internal successors, (248315), 82265 states have internal predecessors, (248315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:53,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82266 states to 82266 states and 248315 transitions. [2021-04-15 02:26:53,912 INFO L78 Accepts]: Start accepts. Automaton has 82266 states and 248315 transitions. Word has length 25 [2021-04-15 02:26:53,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:53,912 INFO L480 AbstractCegarLoop]: Abstraction has 82266 states and 248315 transitions. [2021-04-15 02:26:53,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:53,912 INFO L276 IsEmpty]: Start isEmpty. Operand 82266 states and 248315 transitions. [2021-04-15 02:26:53,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:26:53,983 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:53,983 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:54,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21834,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:54,183 INFO L428 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:54,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:54,184 INFO L82 PathProgramCache]: Analyzing trace with hash 76748370, now seen corresponding path program 442 times [2021-04-15 02:26:54,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:54,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121962506] [2021-04-15 02:26:54,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:54,285 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:54,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121962506] [2021-04-15 02:26:54,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878854715] [2021-04-15 02:26:54,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:54,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:26:54,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:54,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:26:54,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:54,365 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:54,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:54,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-04-15 02:26:54,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473538890] [2021-04-15 02:26:54,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:26:54,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:54,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:26:54,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:26:54,366 INFO L87 Difference]: Start difference. First operand 82266 states and 248315 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:55,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:55,194 INFO L93 Difference]: Finished difference Result 90893 states and 272842 transitions. [2021-04-15 02:26:55,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:26:55,194 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:26:55,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:55,400 INFO L225 Difference]: With dead ends: 90893 [2021-04-15 02:26:55,401 INFO L226 Difference]: Without dead ends: 90893 [2021-04-15 02:26:55,401 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 505.9ms TimeCoverageRelationStatistics Valid=246, Invalid=456, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:26:55,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90893 states. [2021-04-15 02:26:56,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90893 to 54760. [2021-04-15 02:26:56,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54760 states, 54759 states have (on average 2.982103398528096) internal successors, (163297), 54759 states have internal predecessors, (163297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:56,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54760 states to 54760 states and 163297 transitions. [2021-04-15 02:26:56,917 INFO L78 Accepts]: Start accepts. Automaton has 54760 states and 163297 transitions. Word has length 25 [2021-04-15 02:26:56,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:56,917 INFO L480 AbstractCegarLoop]: Abstraction has 54760 states and 163297 transitions. [2021-04-15 02:26:56,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:56,917 INFO L276 IsEmpty]: Start isEmpty. Operand 54760 states and 163297 transitions. [2021-04-15 02:26:56,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:26:56,962 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:56,962 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:57,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21835,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:57,163 INFO L428 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:57,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:57,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1559883308, now seen corresponding path program 443 times [2021-04-15 02:26:57,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:57,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018463697] [2021-04-15 02:26:57,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:57,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:57,264 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:57,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018463697] [2021-04-15 02:26:57,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606309672] [2021-04-15 02:26:57,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:57,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-04-15 02:26:57,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:57,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:26:57,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:57,345 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:57,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:57,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-04-15 02:26:57,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88923039] [2021-04-15 02:26:57,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:26:57,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:57,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:26:57,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:26:57,346 INFO L87 Difference]: Start difference. First operand 54760 states and 163297 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:58,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:58,160 INFO L93 Difference]: Finished difference Result 77734 states and 230348 transitions. [2021-04-15 02:26:58,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:26:58,161 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:26:58,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:58,297 INFO L225 Difference]: With dead ends: 77734 [2021-04-15 02:26:58,298 INFO L226 Difference]: Without dead ends: 77734 [2021-04-15 02:26:58,298 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 239.2ms TimeCoverageRelationStatistics Valid=417, Invalid=773, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:26:58,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77734 states. [2021-04-15 02:26:59,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77734 to 43949. [2021-04-15 02:26:59,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43949 states, 43948 states have (on average 2.969532174387913) internal successors, (130505), 43948 states have internal predecessors, (130505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:59,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43949 states to 43949 states and 130505 transitions. [2021-04-15 02:26:59,446 INFO L78 Accepts]: Start accepts. Automaton has 43949 states and 130505 transitions. Word has length 25 [2021-04-15 02:26:59,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:59,446 INFO L480 AbstractCegarLoop]: Abstraction has 43949 states and 130505 transitions. [2021-04-15 02:26:59,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:59,446 INFO L276 IsEmpty]: Start isEmpty. Operand 43949 states and 130505 transitions. [2021-04-15 02:26:59,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:26:59,484 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:59,484 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:59,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21836 [2021-04-15 02:26:59,684 INFO L428 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:59,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:59,684 INFO L82 PathProgramCache]: Analyzing trace with hash -990719982, now seen corresponding path program 444 times [2021-04-15 02:26:59,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:59,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705251081] [2021-04-15 02:26:59,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:59,800 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:59,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705251081] [2021-04-15 02:26:59,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046402543] [2021-04-15 02:26:59,800 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:59,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-04-15 02:26:59,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:59,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:26:59,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:59,881 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:59,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:59,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-04-15 02:26:59,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690251935] [2021-04-15 02:26:59,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:26:59,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:59,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:26:59,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:26:59,881 INFO L87 Difference]: Start difference. First operand 43949 states and 130505 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:00,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:00,324 INFO L93 Difference]: Finished difference Result 74263 states and 220319 transitions. [2021-04-15 02:27:00,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:27:00,325 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:27:00,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:00,466 INFO L225 Difference]: With dead ends: 74263 [2021-04-15 02:27:00,466 INFO L226 Difference]: Without dead ends: 74263 [2021-04-15 02:27:00,466 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 229.6ms TimeCoverageRelationStatistics Valid=370, Invalid=686, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:27:00,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74263 states. [2021-04-15 02:27:01,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74263 to 67922. [2021-04-15 02:27:01,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67922 states, 67921 states have (on average 2.9886780229973056) internal successors, (202994), 67921 states have internal predecessors, (202994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:01,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67922 states to 67922 states and 202994 transitions. [2021-04-15 02:27:01,905 INFO L78 Accepts]: Start accepts. Automaton has 67922 states and 202994 transitions. Word has length 25 [2021-04-15 02:27:01,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:01,905 INFO L480 AbstractCegarLoop]: Abstraction has 67922 states and 202994 transitions. [2021-04-15 02:27:01,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:01,905 INFO L276 IsEmpty]: Start isEmpty. Operand 67922 states and 202994 transitions. [2021-04-15 02:27:01,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:27:01,964 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:01,964 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:02,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21837,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:02,165 INFO L428 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:02,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:02,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1069673010, now seen corresponding path program 445 times [2021-04-15 02:27:02,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:02,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136386810] [2021-04-15 02:27:02,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:02,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 37 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:02,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136386810] [2021-04-15 02:27:02,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413865522] [2021-04-15 02:27:02,591 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:02,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:27:02,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 43 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:02,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:02,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:27:02,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439407946] [2021-04-15 02:27:02,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:27:02,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:02,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:27:02,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:27:02,682 INFO L87 Difference]: Start difference. First operand 67922 states and 202994 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:03,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:03,099 INFO L93 Difference]: Finished difference Result 68435 states and 203689 transitions. [2021-04-15 02:27:03,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:27:03,100 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:27:03,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:03,236 INFO L225 Difference]: With dead ends: 68435 [2021-04-15 02:27:03,236 INFO L226 Difference]: Without dead ends: 68431 [2021-04-15 02:27:03,237 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 498.6ms TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:27:03,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68431 states. [2021-04-15 02:27:04,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68431 to 67936. [2021-04-15 02:27:04,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67936 states, 67935 states have (on average 2.988253477588872) internal successors, (203007), 67935 states have internal predecessors, (203007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:04,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67936 states to 67936 states and 203007 transitions. [2021-04-15 02:27:04,695 INFO L78 Accepts]: Start accepts. Automaton has 67936 states and 203007 transitions. Word has length 25 [2021-04-15 02:27:04,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:04,695 INFO L480 AbstractCegarLoop]: Abstraction has 67936 states and 203007 transitions. [2021-04-15 02:27:04,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:04,695 INFO L276 IsEmpty]: Start isEmpty. Operand 67936 states and 203007 transitions. [2021-04-15 02:27:04,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:27:04,747 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:04,747 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:04,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21838,447 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:04,947 INFO L428 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:04,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:04,947 INFO L82 PathProgramCache]: Analyzing trace with hash 648076050, now seen corresponding path program 446 times [2021-04-15 02:27:04,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:04,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780305738] [2021-04-15 02:27:04,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:04,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 36 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:05,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780305738] [2021-04-15 02:27:05,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389893596] [2021-04-15 02:27:05,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:05,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:27:05,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:05,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:27:05,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:05,116 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 42 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:05,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:05,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:27:05,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096374486] [2021-04-15 02:27:05,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:27:05,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:05,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:27:05,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:27:05,117 INFO L87 Difference]: Start difference. First operand 67936 states and 203007 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:05,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:05,480 INFO L93 Difference]: Finished difference Result 74376 states and 220879 transitions. [2021-04-15 02:27:05,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:27:05,481 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:27:05,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:05,638 INFO L225 Difference]: With dead ends: 74376 [2021-04-15 02:27:05,639 INFO L226 Difference]: Without dead ends: 74376 [2021-04-15 02:27:05,639 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 103.8ms TimeCoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:27:05,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74376 states. [2021-04-15 02:27:07,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74376 to 67967. [2021-04-15 02:27:07,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67967 states, 67966 states have (on average 2.988155842627196) internal successors, (203093), 67966 states have internal predecessors, (203093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:07,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67967 states to 67967 states and 203093 transitions. [2021-04-15 02:27:07,252 INFO L78 Accepts]: Start accepts. Automaton has 67967 states and 203093 transitions. Word has length 25 [2021-04-15 02:27:07,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:07,252 INFO L480 AbstractCegarLoop]: Abstraction has 67967 states and 203093 transitions. [2021-04-15 02:27:07,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:07,252 INFO L276 IsEmpty]: Start isEmpty. Operand 67967 states and 203093 transitions. [2021-04-15 02:27:07,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:27:07,303 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:07,303 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:07,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21839,448 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:07,503 INFO L428 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:07,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:07,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1080971284, now seen corresponding path program 447 times [2021-04-15 02:27:07,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:07,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855242574] [2021-04-15 02:27:07,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:07,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:07,577 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:07,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855242574] [2021-04-15 02:27:07,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903432488] [2021-04-15 02:27:07,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:07,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:27:07,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:07,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:27:07,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:07,661 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:07,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:07,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:27:07,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444858881] [2021-04-15 02:27:07,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:27:07,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:07,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:27:07,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:27:07,662 INFO L87 Difference]: Start difference. First operand 67967 states and 203093 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:08,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:08,039 INFO L93 Difference]: Finished difference Result 78884 states and 234170 transitions. [2021-04-15 02:27:08,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:27:08,040 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:27:08,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:08,192 INFO L225 Difference]: With dead ends: 78884 [2021-04-15 02:27:08,192 INFO L226 Difference]: Without dead ends: 78884 [2021-04-15 02:27:08,192 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 126.0ms TimeCoverageRelationStatistics Valid=215, Invalid=337, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:27:08,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78884 states. [2021-04-15 02:27:09,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78884 to 67988. [2021-04-15 02:27:09,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67988 states, 67987 states have (on average 2.988071248915234) internal successors, (203150), 67987 states have internal predecessors, (203150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:10,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67988 states to 67988 states and 203150 transitions. [2021-04-15 02:27:10,152 INFO L78 Accepts]: Start accepts. Automaton has 67988 states and 203150 transitions. Word has length 25 [2021-04-15 02:27:10,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:10,152 INFO L480 AbstractCegarLoop]: Abstraction has 67988 states and 203150 transitions. [2021-04-15 02:27:10,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:10,152 INFO L276 IsEmpty]: Start isEmpty. Operand 67988 states and 203150 transitions. [2021-04-15 02:27:10,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:27:10,200 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:10,200 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:10,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21840,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:10,401 INFO L428 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:10,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:10,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1153136210, now seen corresponding path program 448 times [2021-04-15 02:27:10,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:10,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676506669] [2021-04-15 02:27:10,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:10,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:10,487 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:10,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676506669] [2021-04-15 02:27:10,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858007231] [2021-04-15 02:27:10,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:10,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:27:10,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:10,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:27:10,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:10,570 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:10,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:10,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:27:10,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406352849] [2021-04-15 02:27:10,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:27:10,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:10,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:27:10,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:27:10,571 INFO L87 Difference]: Start difference. First operand 67988 states and 203150 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:11,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:11,553 INFO L93 Difference]: Finished difference Result 114424 states and 344057 transitions. [2021-04-15 02:27:11,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:27:11,554 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:27:11,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:11,916 INFO L225 Difference]: With dead ends: 114424 [2021-04-15 02:27:11,916 INFO L226 Difference]: Without dead ends: 114424 [2021-04-15 02:27:11,916 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 142.9ms TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:27:12,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114424 states. [2021-04-15 02:27:13,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114424 to 104105. [2021-04-15 02:27:13,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104105 states, 104104 states have (on average 3.02537846768616) internal successors, (314954), 104104 states have internal predecessors, (314954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:14,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104105 states to 104105 states and 314954 transitions. [2021-04-15 02:27:14,660 INFO L78 Accepts]: Start accepts. Automaton has 104105 states and 314954 transitions. Word has length 25 [2021-04-15 02:27:14,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:14,660 INFO L480 AbstractCegarLoop]: Abstraction has 104105 states and 314954 transitions. [2021-04-15 02:27:14,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:14,660 INFO L276 IsEmpty]: Start isEmpty. Operand 104105 states and 314954 transitions. [2021-04-15 02:27:14,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:27:14,731 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:14,731 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:14,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21841,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:14,931 INFO L428 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:14,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:14,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1690991788, now seen corresponding path program 449 times [2021-04-15 02:27:14,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:14,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892822458] [2021-04-15 02:27:14,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:15,029 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:15,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892822458] [2021-04-15 02:27:15,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250170084] [2021-04-15 02:27:15,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:15,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-04-15 02:27:15,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:15,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:27:15,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:15,115 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:15,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:15,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-04-15 02:27:15,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295696765] [2021-04-15 02:27:15,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:27:15,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:15,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:27:15,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:27:15,116 INFO L87 Difference]: Start difference. First operand 104105 states and 314954 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:15,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:15,667 INFO L93 Difference]: Finished difference Result 110268 states and 331729 transitions. [2021-04-15 02:27:15,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:27:15,668 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:27:15,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:15,942 INFO L225 Difference]: With dead ends: 110268 [2021-04-15 02:27:15,942 INFO L226 Difference]: Without dead ends: 110268 [2021-04-15 02:27:15,942 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:27:16,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110268 states. [2021-04-15 02:27:18,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110268 to 102357. [2021-04-15 02:27:18,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102357 states, 102356 states have (on average 3.0227539176990113) internal successors, (309397), 102356 states have internal predecessors, (309397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:18,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102357 states to 102357 states and 309397 transitions. [2021-04-15 02:27:18,505 INFO L78 Accepts]: Start accepts. Automaton has 102357 states and 309397 transitions. Word has length 25 [2021-04-15 02:27:18,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:18,505 INFO L480 AbstractCegarLoop]: Abstraction has 102357 states and 309397 transitions. [2021-04-15 02:27:18,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:18,505 INFO L276 IsEmpty]: Start isEmpty. Operand 102357 states and 309397 transitions. [2021-04-15 02:27:18,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:27:18,581 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:18,581 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:18,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21842 [2021-04-15 02:27:18,781 INFO L428 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:18,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:18,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1184645522, now seen corresponding path program 450 times [2021-04-15 02:27:18,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:18,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219513102] [2021-04-15 02:27:18,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:18,877 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:18,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219513102] [2021-04-15 02:27:18,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478011550] [2021-04-15 02:27:18,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:18,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-04-15 02:27:18,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:18,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:27:18,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:18,961 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:18,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:18,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-04-15 02:27:18,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596214951] [2021-04-15 02:27:18,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:27:18,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:18,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:27:18,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:27:18,961 INFO L87 Difference]: Start difference. First operand 102357 states and 309397 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:20,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:20,231 INFO L93 Difference]: Finished difference Result 187580 states and 568248 transitions. [2021-04-15 02:27:20,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:27:20,232 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:27:20,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:20,719 INFO L225 Difference]: With dead ends: 187580 [2021-04-15 02:27:20,719 INFO L226 Difference]: Without dead ends: 187580 [2021-04-15 02:27:20,719 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 133.0ms TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:27:20,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187580 states. [2021-04-15 02:27:24,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187580 to 185975. [2021-04-15 02:27:24,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185975 states, 185974 states have (on average 3.0363814296622107) internal successors, (564688), 185974 states have internal predecessors, (564688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:25,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185975 states to 185975 states and 564688 transitions. [2021-04-15 02:27:25,007 INFO L78 Accepts]: Start accepts. Automaton has 185975 states and 564688 transitions. Word has length 25 [2021-04-15 02:27:25,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:25,007 INFO L480 AbstractCegarLoop]: Abstraction has 185975 states and 564688 transitions. [2021-04-15 02:27:25,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:25,007 INFO L276 IsEmpty]: Start isEmpty. Operand 185975 states and 564688 transitions. [2021-04-15 02:27:25,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:27:25,111 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:25,111 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:25,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21843 [2021-04-15 02:27:25,312 INFO L428 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:25,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:25,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1627186836, now seen corresponding path program 451 times [2021-04-15 02:27:25,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:25,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326306975] [2021-04-15 02:27:25,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:25,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:25,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326306975] [2021-04-15 02:27:25,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273233164] [2021-04-15 02:27:25,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:25,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:27:25,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:25,492 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:25,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:25,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-04-15 02:27:25,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165834440] [2021-04-15 02:27:25,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:27:25,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:25,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:27:25,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:27:25,493 INFO L87 Difference]: Start difference. First operand 185975 states and 564688 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:27,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:27,106 INFO L93 Difference]: Finished difference Result 189635 states and 574166 transitions. [2021-04-15 02:27:27,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:27:27,107 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:27:27,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:27,577 INFO L225 Difference]: With dead ends: 189635 [2021-04-15 02:27:27,577 INFO L226 Difference]: Without dead ends: 189635 [2021-04-15 02:27:27,578 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 189.5ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:27:27,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189635 states. [2021-04-15 02:27:31,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189635 to 184848. [2021-04-15 02:27:31,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184848 states, 184847 states have (on average 3.036094716170671) internal successors, (561213), 184847 states have internal predecessors, (561213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:31,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184848 states to 184848 states and 561213 transitions. [2021-04-15 02:27:31,813 INFO L78 Accepts]: Start accepts. Automaton has 184848 states and 561213 transitions. Word has length 25 [2021-04-15 02:27:31,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:31,813 INFO L480 AbstractCegarLoop]: Abstraction has 184848 states and 561213 transitions. [2021-04-15 02:27:31,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:31,813 INFO L276 IsEmpty]: Start isEmpty. Operand 184848 states and 561213 transitions. [2021-04-15 02:27:31,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:27:31,902 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:31,902 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:32,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21844,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:32,103 INFO L428 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:32,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:32,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1400323282, now seen corresponding path program 452 times [2021-04-15 02:27:32,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:32,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214279385] [2021-04-15 02:27:32,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:32,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:32,216 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:32,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214279385] [2021-04-15 02:27:32,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429650525] [2021-04-15 02:27:32,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:32,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:27:32,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:32,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:27:32,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:32,299 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:32,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:32,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-04-15 02:27:32,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123672263] [2021-04-15 02:27:32,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:27:32,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:32,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:27:32,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:27:32,300 INFO L87 Difference]: Start difference. First operand 184848 states and 561213 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:34,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:34,322 INFO L93 Difference]: Finished difference Result 276211 states and 836546 transitions. [2021-04-15 02:27:34,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:27:34,323 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:27:34,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:35,063 INFO L225 Difference]: With dead ends: 276211 [2021-04-15 02:27:35,063 INFO L226 Difference]: Without dead ends: 276211 [2021-04-15 02:27:35,063 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 311.2ms TimeCoverageRelationStatistics Valid=535, Invalid=1025, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 02:27:35,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276211 states. [2021-04-15 02:27:40,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276211 to 269074. [2021-04-15 02:27:40,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269074 states, 269073 states have (on average 3.036577434376545) internal successors, (817061), 269073 states have internal predecessors, (817061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:41,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269074 states to 269074 states and 817061 transitions. [2021-04-15 02:27:41,940 INFO L78 Accepts]: Start accepts. Automaton has 269074 states and 817061 transitions. Word has length 25 [2021-04-15 02:27:41,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:41,940 INFO L480 AbstractCegarLoop]: Abstraction has 269074 states and 817061 transitions. [2021-04-15 02:27:41,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:41,940 INFO L276 IsEmpty]: Start isEmpty. Operand 269074 states and 817061 transitions. [2021-04-15 02:27:42,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:27:42,052 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:42,052 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:42,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21845 [2021-04-15 02:27:42,253 INFO L428 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:42,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:42,253 INFO L82 PathProgramCache]: Analyzing trace with hash -239563868, now seen corresponding path program 453 times [2021-04-15 02:27:42,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:42,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502193133] [2021-04-15 02:27:42,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:42,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:42,356 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:42,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502193133] [2021-04-15 02:27:42,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768224553] [2021-04-15 02:27:42,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:42,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-04-15 02:27:42,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:42,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:27:42,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:42,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:42,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-04-15 02:27:42,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923830365] [2021-04-15 02:27:42,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:27:42,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:42,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:27:42,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:27:42,446 INFO L87 Difference]: Start difference. First operand 269074 states and 817061 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:44,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:44,570 INFO L93 Difference]: Finished difference Result 315035 states and 954004 transitions. [2021-04-15 02:27:44,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:27:44,571 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:27:44,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:45,350 INFO L225 Difference]: With dead ends: 315035 [2021-04-15 02:27:45,351 INFO L226 Difference]: Without dead ends: 315035 [2021-04-15 02:27:45,351 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 224.9ms TimeCoverageRelationStatistics Valid=369, Invalid=687, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:27:45,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315035 states. [2021-04-15 02:27:49,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315035 to 143842. [2021-04-15 02:27:49,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143842 states, 143841 states have (on average 3.0134732100027115) internal successors, (433461), 143841 states have internal predecessors, (433461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:50,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143842 states to 143842 states and 433461 transitions. [2021-04-15 02:27:50,523 INFO L78 Accepts]: Start accepts. Automaton has 143842 states and 433461 transitions. Word has length 25 [2021-04-15 02:27:50,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:50,523 INFO L480 AbstractCegarLoop]: Abstraction has 143842 states and 433461 transitions. [2021-04-15 02:27:50,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:50,523 INFO L276 IsEmpty]: Start isEmpty. Operand 143842 states and 433461 transitions. [2021-04-15 02:27:50,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:27:50,606 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:50,606 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:50,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21846 [2021-04-15 02:27:50,807 INFO L428 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:50,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:50,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1904292324, now seen corresponding path program 454 times [2021-04-15 02:27:50,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:50,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387555609] [2021-04-15 02:27:50,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:50,885 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:50,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387555609] [2021-04-15 02:27:50,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141463911] [2021-04-15 02:27:50,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:50,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:27:50,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:50,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:27:50,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:50,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:50,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:27:50,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43637044] [2021-04-15 02:27:50,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:27:50,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:50,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:27:50,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:27:50,966 INFO L87 Difference]: Start difference. First operand 143842 states and 433461 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:51,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:51,708 INFO L93 Difference]: Finished difference Result 173347 states and 520424 transitions. [2021-04-15 02:27:51,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:27:51,709 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:27:51,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:52,102 INFO L225 Difference]: With dead ends: 173347 [2021-04-15 02:27:52,102 INFO L226 Difference]: Without dead ends: 173347 [2021-04-15 02:27:52,102 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:27:52,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173347 states. [2021-04-15 02:27:55,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173347 to 144026. [2021-04-15 02:27:55,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144026 states, 144025 states have (on average 3.0132685297691375) internal successors, (433986), 144025 states have internal predecessors, (433986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:55,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144026 states to 144026 states and 433986 transitions. [2021-04-15 02:27:55,937 INFO L78 Accepts]: Start accepts. Automaton has 144026 states and 433986 transitions. Word has length 25 [2021-04-15 02:27:55,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:55,938 INFO L480 AbstractCegarLoop]: Abstraction has 144026 states and 433986 transitions. [2021-04-15 02:27:55,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:55,938 INFO L276 IsEmpty]: Start isEmpty. Operand 144026 states and 433986 transitions. [2021-04-15 02:27:56,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:27:56,017 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:56,017 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:56,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21847,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:56,217 INFO L428 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:56,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:56,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1852819394, now seen corresponding path program 455 times [2021-04-15 02:27:56,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:56,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667797824] [2021-04-15 02:27:56,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:56,308 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:56,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667797824] [2021-04-15 02:27:56,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823186217] [2021-04-15 02:27:56,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:56,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:27:56,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:56,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:27:56,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:56,861 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:56,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:56,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-04-15 02:27:56,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042198477] [2021-04-15 02:27:56,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:27:56,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:56,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:27:56,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:27:56,862 INFO L87 Difference]: Start difference. First operand 144026 states and 433986 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:57,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:57,650 INFO L93 Difference]: Finished difference Result 165051 states and 495636 transitions. [2021-04-15 02:27:57,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:27:57,651 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:27:57,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:58,000 INFO L225 Difference]: With dead ends: 165051 [2021-04-15 02:27:58,001 INFO L226 Difference]: Without dead ends: 165051 [2021-04-15 02:27:58,001 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 623.6ms TimeCoverageRelationStatistics Valid=214, Invalid=386, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:27:58,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165051 states. [2021-04-15 02:28:00,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165051 to 98547. [2021-04-15 02:28:00,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98547 states, 98546 states have (on average 3.001745377793112) internal successors, (295810), 98546 states have internal predecessors, (295810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:00,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98547 states to 98547 states and 295810 transitions. [2021-04-15 02:28:00,986 INFO L78 Accepts]: Start accepts. Automaton has 98547 states and 295810 transitions. Word has length 25 [2021-04-15 02:28:00,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:00,986 INFO L480 AbstractCegarLoop]: Abstraction has 98547 states and 295810 transitions. [2021-04-15 02:28:00,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:00,986 INFO L276 IsEmpty]: Start isEmpty. Operand 98547 states and 295810 transitions. [2021-04-15 02:28:01,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:28:01,037 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:01,037 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:01,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21848,457 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:01,238 INFO L428 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:01,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:01,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1935801636, now seen corresponding path program 456 times [2021-04-15 02:28:01,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:01,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700655145] [2021-04-15 02:28:01,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:01,330 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:28:01,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700655145] [2021-04-15 02:28:01,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133906426] [2021-04-15 02:28:01,330 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:01,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:28:01,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:01,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:28:01,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:01,412 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:28:01,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:01,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-04-15 02:28:01,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951091674] [2021-04-15 02:28:01,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:28:01,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:01,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:28:01,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:28:01,413 INFO L87 Difference]: Start difference. First operand 98547 states and 295810 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:02,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:02,518 INFO L93 Difference]: Finished difference Result 159493 states and 478171 transitions. [2021-04-15 02:28:02,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:28:02,519 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:28:02,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:02,887 INFO L225 Difference]: With dead ends: 159493 [2021-04-15 02:28:02,887 INFO L226 Difference]: Without dead ends: 159493 [2021-04-15 02:28:02,887 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:28:02,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159493 states. [2021-04-15 02:28:05,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159493 to 140825. [2021-04-15 02:28:05,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140825 states, 140824 states have (on average 3.008095211043572) internal successors, (423612), 140824 states have internal predecessors, (423612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:05,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140825 states to 140825 states and 423612 transitions. [2021-04-15 02:28:05,940 INFO L78 Accepts]: Start accepts. Automaton has 140825 states and 423612 transitions. Word has length 25 [2021-04-15 02:28:05,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:05,941 INFO L480 AbstractCegarLoop]: Abstraction has 140825 states and 423612 transitions. [2021-04-15 02:28:05,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:05,941 INFO L276 IsEmpty]: Start isEmpty. Operand 140825 states and 423612 transitions. [2021-04-15 02:28:06,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:28:06,018 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:06,018 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:06,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21849,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:06,219 INFO L428 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:06,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:06,219 INFO L82 PathProgramCache]: Analyzing trace with hash -876030722, now seen corresponding path program 457 times [2021-04-15 02:28:06,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:06,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498755131] [2021-04-15 02:28:06,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:06,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:06,318 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:06,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498755131] [2021-04-15 02:28:06,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613981313] [2021-04-15 02:28:06,319 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:06,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:28:06,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:06,398 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:06,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:06,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-04-15 02:28:06,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975633692] [2021-04-15 02:28:06,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:28:06,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:06,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:28:06,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:28:06,398 INFO L87 Difference]: Start difference. First operand 140825 states and 423612 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:07,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:07,768 INFO L93 Difference]: Finished difference Result 166578 states and 499146 transitions. [2021-04-15 02:28:07,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:28:07,768 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:28:07,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:08,156 INFO L225 Difference]: With dead ends: 166578 [2021-04-15 02:28:08,157 INFO L226 Difference]: Without dead ends: 166578 [2021-04-15 02:28:08,157 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 188.8ms TimeCoverageRelationStatistics Valid=294, Invalid=576, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:28:08,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166578 states. [2021-04-15 02:28:10,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166578 to 88690. [2021-04-15 02:28:10,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88690 states, 88689 states have (on average 2.996685045496059) internal successors, (265773), 88689 states have internal predecessors, (265773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:10,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88690 states to 88690 states and 265773 transitions. [2021-04-15 02:28:10,778 INFO L78 Accepts]: Start accepts. Automaton has 88690 states and 265773 transitions. Word has length 25 [2021-04-15 02:28:10,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:10,778 INFO L480 AbstractCegarLoop]: Abstraction has 88690 states and 265773 transitions. [2021-04-15 02:28:10,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:10,778 INFO L276 IsEmpty]: Start isEmpty. Operand 88690 states and 265773 transitions. [2021-04-15 02:28:10,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:28:10,829 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:10,829 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:11,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21850,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:11,030 INFO L428 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:11,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:11,030 INFO L82 PathProgramCache]: Analyzing trace with hash -2143487900, now seen corresponding path program 458 times [2021-04-15 02:28:11,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:11,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721756570] [2021-04-15 02:28:11,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:11,134 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:11,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721756570] [2021-04-15 02:28:11,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667131936] [2021-04-15 02:28:11,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:11,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:28:11,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:11,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:28:11,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:11,215 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:11,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:11,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-04-15 02:28:11,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034576628] [2021-04-15 02:28:11,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:28:11,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:11,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:28:11,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:28:11,215 INFO L87 Difference]: Start difference. First operand 88690 states and 265773 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:11,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:11,994 INFO L93 Difference]: Finished difference Result 132265 states and 395319 transitions. [2021-04-15 02:28:11,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:28:11,995 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:28:11,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:12,289 INFO L225 Difference]: With dead ends: 132265 [2021-04-15 02:28:12,289 INFO L226 Difference]: Without dead ends: 132265 [2021-04-15 02:28:12,289 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 295.4ms TimeCoverageRelationStatistics Valid=534, Invalid=1026, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 02:28:12,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132265 states. [2021-04-15 02:28:14,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132265 to 75005. [2021-04-15 02:28:14,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75005 states, 75004 states have (on average 3.0035331448989386) internal successors, (225277), 75004 states have internal predecessors, (225277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:14,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75005 states to 75005 states and 225277 transitions. [2021-04-15 02:28:14,709 INFO L78 Accepts]: Start accepts. Automaton has 75005 states and 225277 transitions. Word has length 25 [2021-04-15 02:28:14,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:14,709 INFO L480 AbstractCegarLoop]: Abstraction has 75005 states and 225277 transitions. [2021-04-15 02:28:14,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:14,709 INFO L276 IsEmpty]: Start isEmpty. Operand 75005 states and 225277 transitions. [2021-04-15 02:28:14,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:28:14,757 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:14,757 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:14,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21851,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:14,957 INFO L428 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:14,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:14,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1062601334, now seen corresponding path program 459 times [2021-04-15 02:28:14,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:14,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74224133] [2021-04-15 02:28:14,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:14,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:15,048 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:28:15,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74224133] [2021-04-15 02:28:15,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75133103] [2021-04-15 02:28:15,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:15,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:28:15,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:15,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:28:15,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:15,136 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:28:15,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:15,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-04-15 02:28:15,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419552648] [2021-04-15 02:28:15,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:28:15,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:15,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:28:15,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:28:15,137 INFO L87 Difference]: Start difference. First operand 75005 states and 225277 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:15,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:15,481 INFO L93 Difference]: Finished difference Result 75445 states and 225722 transitions. [2021-04-15 02:28:15,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:28:15,482 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:28:15,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:15,988 INFO L225 Difference]: With dead ends: 75445 [2021-04-15 02:28:15,988 INFO L226 Difference]: Without dead ends: 75443 [2021-04-15 02:28:15,988 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:28:16,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75443 states. [2021-04-15 02:28:17,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75443 to 74587. [2021-04-15 02:28:17,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74587 states, 74586 states have (on average 3.0023462848255704) internal successors, (223933), 74586 states have internal predecessors, (223933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:17,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74587 states to 74587 states and 223933 transitions. [2021-04-15 02:28:17,371 INFO L78 Accepts]: Start accepts. Automaton has 74587 states and 223933 transitions. Word has length 25 [2021-04-15 02:28:17,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:17,371 INFO L480 AbstractCegarLoop]: Abstraction has 74587 states and 223933 transitions. [2021-04-15 02:28:17,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:17,371 INFO L276 IsEmpty]: Start isEmpty. Operand 74587 states and 223933 transitions. [2021-04-15 02:28:17,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:28:17,417 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:17,417 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:17,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21852 [2021-04-15 02:28:17,618 INFO L428 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:17,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:17,618 INFO L82 PathProgramCache]: Analyzing trace with hash 420533604, now seen corresponding path program 460 times [2021-04-15 02:28:17,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:17,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058988410] [2021-04-15 02:28:17,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:17,719 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:17,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058988410] [2021-04-15 02:28:17,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414566361] [2021-04-15 02:28:17,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:17,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:28:17,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:17,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:28:17,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:17,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:17,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-04-15 02:28:17,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793212899] [2021-04-15 02:28:17,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:28:17,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:17,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:28:17,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:28:17,806 INFO L87 Difference]: Start difference. First operand 74587 states and 223933 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:18,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:18,246 INFO L93 Difference]: Finished difference Result 83574 states and 249816 transitions. [2021-04-15 02:28:18,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:28:18,247 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:28:18,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:18,400 INFO L225 Difference]: With dead ends: 83574 [2021-04-15 02:28:18,400 INFO L226 Difference]: Without dead ends: 83574 [2021-04-15 02:28:18,400 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 189.2ms TimeCoverageRelationStatistics Valid=297, Invalid=573, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:28:18,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83574 states. [2021-04-15 02:28:19,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83574 to 52866. [2021-04-15 02:28:19,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52866 states, 52865 states have (on average 2.989047574009269) internal successors, (158016), 52865 states have internal predecessors, (158016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:19,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52866 states to 52866 states and 158016 transitions. [2021-04-15 02:28:19,803 INFO L78 Accepts]: Start accepts. Automaton has 52866 states and 158016 transitions. Word has length 25 [2021-04-15 02:28:19,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:19,803 INFO L480 AbstractCegarLoop]: Abstraction has 52866 states and 158016 transitions. [2021-04-15 02:28:19,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:19,803 INFO L276 IsEmpty]: Start isEmpty. Operand 52866 states and 158016 transitions. [2021-04-15 02:28:20,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:28:20,181 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:20,181 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:20,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21853 [2021-04-15 02:28:20,382 INFO L428 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:20,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:20,382 INFO L82 PathProgramCache]: Analyzing trace with hash -846923574, now seen corresponding path program 461 times [2021-04-15 02:28:20,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:20,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527326096] [2021-04-15 02:28:20,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:20,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:20,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527326096] [2021-04-15 02:28:20,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595741107] [2021-04-15 02:28:20,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:20,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:28:20,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:20,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:28:20,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:20,596 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:20,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:20,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-04-15 02:28:20,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059912338] [2021-04-15 02:28:20,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:28:20,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:20,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:28:20,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:28:20,597 INFO L87 Difference]: Start difference. First operand 52866 states and 158016 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:21,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:21,202 INFO L93 Difference]: Finished difference Result 78034 states and 231687 transitions. [2021-04-15 02:28:21,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:28:21,203 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:28:21,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:21,349 INFO L225 Difference]: With dead ends: 78034 [2021-04-15 02:28:21,349 INFO L226 Difference]: Without dead ends: 78034 [2021-04-15 02:28:21,349 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 313.6ms TimeCoverageRelationStatistics Valid=541, Invalid=1019, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 02:28:21,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78034 states. [2021-04-15 02:28:22,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78034 to 41286. [2021-04-15 02:28:22,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41286 states, 41285 states have (on average 2.9907714666343708) internal successors, (123474), 41285 states have internal predecessors, (123474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:22,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41286 states to 41286 states and 123474 transitions. [2021-04-15 02:28:22,533 INFO L78 Accepts]: Start accepts. Automaton has 41286 states and 123474 transitions. Word has length 25 [2021-04-15 02:28:22,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:22,534 INFO L480 AbstractCegarLoop]: Abstraction has 41286 states and 123474 transitions. [2021-04-15 02:28:22,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:22,534 INFO L276 IsEmpty]: Start isEmpty. Operand 41286 states and 123474 transitions. [2021-04-15 02:28:22,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:28:22,569 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:22,569 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:22,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21854,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:22,770 INFO L428 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:22,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:22,770 INFO L82 PathProgramCache]: Analyzing trace with hash -41716956, now seen corresponding path program 462 times [2021-04-15 02:28:22,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:22,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744874918] [2021-04-15 02:28:22,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:22,832 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:28:22,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744874918] [2021-04-15 02:28:22,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133299571] [2021-04-15 02:28:22,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:22,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:28:22,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:22,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:28:22,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:22,909 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:28:22,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:22,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:28:22,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226524422] [2021-04-15 02:28:22,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:28:22,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:22,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:28:22,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:28:22,910 INFO L87 Difference]: Start difference. First operand 41286 states and 123474 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:23,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:23,225 INFO L93 Difference]: Finished difference Result 41661 states and 123915 transitions. [2021-04-15 02:28:23,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:28:23,226 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:28:23,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:23,289 INFO L225 Difference]: With dead ends: 41661 [2021-04-15 02:28:23,289 INFO L226 Difference]: Without dead ends: 41657 [2021-04-15 02:28:23,289 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 140.8ms TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:28:23,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41657 states. [2021-04-15 02:28:23,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41657 to 41286. [2021-04-15 02:28:23,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41286 states, 41285 states have (on average 2.9906503572726173) internal successors, (123469), 41285 states have internal predecessors, (123469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:24,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41286 states to 41286 states and 123469 transitions. [2021-04-15 02:28:24,079 INFO L78 Accepts]: Start accepts. Automaton has 41286 states and 123469 transitions. Word has length 25 [2021-04-15 02:28:24,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:24,079 INFO L480 AbstractCegarLoop]: Abstraction has 41286 states and 123469 transitions. [2021-04-15 02:28:24,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:24,079 INFO L276 IsEmpty]: Start isEmpty. Operand 41286 states and 123469 transitions. [2021-04-15 02:28:24,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:28:24,115 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:24,115 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:24,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21855 [2021-04-15 02:28:24,315 INFO L428 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:24,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:24,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1688753060, now seen corresponding path program 463 times [2021-04-15 02:28:24,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:24,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246473811] [2021-04-15 02:28:24,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:24,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:24,423 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:24,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246473811] [2021-04-15 02:28:24,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838329925] [2021-04-15 02:28:24,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:24,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:28:24,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:24,512 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:24,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:24,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-04-15 02:28:24,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23095489] [2021-04-15 02:28:24,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:28:24,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:24,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:28:24,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:28:24,513 INFO L87 Difference]: Start difference. First operand 41286 states and 123469 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:25,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:25,016 INFO L93 Difference]: Finished difference Result 67989 states and 201876 transitions. [2021-04-15 02:28:25,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:28:25,016 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:28:25,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:25,144 INFO L225 Difference]: With dead ends: 67989 [2021-04-15 02:28:25,144 INFO L226 Difference]: Without dead ends: 67989 [2021-04-15 02:28:25,144 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 272.1ms TimeCoverageRelationStatistics Valid=460, Invalid=872, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 02:28:25,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67989 states. [2021-04-15 02:28:26,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67989 to 60015. [2021-04-15 02:28:26,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60015 states, 60014 states have (on average 2.994384643583164) internal successors, (179705), 60014 states have internal predecessors, (179705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:26,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60015 states to 60015 states and 179705 transitions. [2021-04-15 02:28:26,679 INFO L78 Accepts]: Start accepts. Automaton has 60015 states and 179705 transitions. Word has length 25 [2021-04-15 02:28:26,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:26,679 INFO L480 AbstractCegarLoop]: Abstraction has 60015 states and 179705 transitions. [2021-04-15 02:28:26,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:26,679 INFO L276 IsEmpty]: Start isEmpty. Operand 60015 states and 179705 transitions. [2021-04-15 02:28:26,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:28:26,718 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:26,718 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:26,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21856,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:26,919 INFO L428 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:26,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:26,919 INFO L82 PathProgramCache]: Analyzing trace with hash 963120774, now seen corresponding path program 464 times [2021-04-15 02:28:26,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:26,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047694822] [2021-04-15 02:28:26,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:26,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:26,990 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:26,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047694822] [2021-04-15 02:28:26,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662483912] [2021-04-15 02:28:26,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:27,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:28:27,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:27,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:28:27,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:28:27,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:27,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:28:27,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239230994] [2021-04-15 02:28:27,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:28:27,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:27,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:28:27,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:28:27,082 INFO L87 Difference]: Start difference. First operand 60015 states and 179705 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:27,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:27,528 INFO L93 Difference]: Finished difference Result 60480 states and 180320 transitions. [2021-04-15 02:28:27,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:28:27,529 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:28:27,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:27,633 INFO L225 Difference]: With dead ends: 60480 [2021-04-15 02:28:27,633 INFO L226 Difference]: Without dead ends: 60476 [2021-04-15 02:28:27,634 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 169.8ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:28:27,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60476 states. [2021-04-15 02:28:28,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60476 to 60031. [2021-04-15 02:28:28,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60031 states, 60030 states have (on average 2.9940029985007497) internal successors, (179730), 60030 states have internal predecessors, (179730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:28,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60031 states to 60031 states and 179730 transitions. [2021-04-15 02:28:28,819 INFO L78 Accepts]: Start accepts. Automaton has 60031 states and 179730 transitions. Word has length 25 [2021-04-15 02:28:28,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:28,819 INFO L480 AbstractCegarLoop]: Abstraction has 60031 states and 179730 transitions. [2021-04-15 02:28:28,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:28,819 INFO L276 IsEmpty]: Start isEmpty. Operand 60031 states and 179730 transitions. [2021-04-15 02:28:28,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:28:28,861 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:28,861 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:29,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21857,466 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:29,062 INFO L428 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:29,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:29,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1614097462, now seen corresponding path program 465 times [2021-04-15 02:28:29,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:29,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92023075] [2021-04-15 02:28:29,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:29,131 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:29,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92023075] [2021-04-15 02:28:29,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111691420] [2021-04-15 02:28:29,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:29,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:28:29,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:29,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:28:29,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:29,213 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:29,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:29,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:28:29,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595455250] [2021-04-15 02:28:29,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:28:29,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:29,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:28:29,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:28:29,213 INFO L87 Difference]: Start difference. First operand 60031 states and 179730 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:29,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:29,528 INFO L93 Difference]: Finished difference Result 65631 states and 195205 transitions. [2021-04-15 02:28:29,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:28:29,529 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:28:29,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:29,637 INFO L225 Difference]: With dead ends: 65631 [2021-04-15 02:28:29,638 INFO L226 Difference]: Without dead ends: 65631 [2021-04-15 02:28:29,638 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=170, Invalid=250, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:28:29,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65631 states. [2021-04-15 02:28:30,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65631 to 60041. [2021-04-15 02:28:31,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60041 states, 60040 states have (on average 2.9939373750832776) internal successors, (179756), 60040 states have internal predecessors, (179756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:31,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60041 states to 60041 states and 179756 transitions. [2021-04-15 02:28:31,154 INFO L78 Accepts]: Start accepts. Automaton has 60041 states and 179756 transitions. Word has length 25 [2021-04-15 02:28:31,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:31,154 INFO L480 AbstractCegarLoop]: Abstraction has 60041 states and 179756 transitions. [2021-04-15 02:28:31,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:31,154 INFO L276 IsEmpty]: Start isEmpty. Operand 60041 states and 179756 transitions. [2021-04-15 02:28:31,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:28:31,467 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:31,467 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:31,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21858,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:31,668 INFO L428 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:31,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:31,668 INFO L82 PathProgramCache]: Analyzing trace with hash 951822500, now seen corresponding path program 466 times [2021-04-15 02:28:31,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:31,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977464158] [2021-04-15 02:28:31,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:31,741 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:28:31,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977464158] [2021-04-15 02:28:31,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275322206] [2021-04-15 02:28:31,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:31,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:28:31,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:31,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:28:31,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:31,827 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 36 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:28:31,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:31,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:28:31,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638235106] [2021-04-15 02:28:31,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:28:31,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:31,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:28:31,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:28:31,828 INFO L87 Difference]: Start difference. First operand 60041 states and 179756 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:32,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:32,188 INFO L93 Difference]: Finished difference Result 70196 states and 208624 transitions. [2021-04-15 02:28:32,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:28:32,189 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:28:32,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:32,316 INFO L225 Difference]: With dead ends: 70196 [2021-04-15 02:28:32,316 INFO L226 Difference]: Without dead ends: 70196 [2021-04-15 02:28:32,316 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 141.6ms TimeCoverageRelationStatistics Valid=248, Invalid=402, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:28:32,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70196 states. [2021-04-15 02:28:33,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70196 to 60079. [2021-04-15 02:28:33,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60079 states, 60078 states have (on average 2.9939412097606444) internal successors, (179870), 60078 states have internal predecessors, (179870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:33,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60079 states to 60079 states and 179870 transitions. [2021-04-15 02:28:33,617 INFO L78 Accepts]: Start accepts. Automaton has 60079 states and 179870 transitions. Word has length 25 [2021-04-15 02:28:33,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:33,618 INFO L480 AbstractCegarLoop]: Abstraction has 60079 states and 179870 transitions. [2021-04-15 02:28:33,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:33,618 INFO L276 IsEmpty]: Start isEmpty. Operand 60079 states and 179870 transitions. [2021-04-15 02:28:33,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:28:33,661 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:33,661 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:33,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21859,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:33,862 INFO L428 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:33,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:33,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1109037302, now seen corresponding path program 467 times [2021-04-15 02:28:33,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:33,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520336424] [2021-04-15 02:28:33,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:33,941 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:33,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520336424] [2021-04-15 02:28:33,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558262311] [2021-04-15 02:28:33,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:33,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:28:33,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:33,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:28:33,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:34,035 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:34,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:34,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:28:34,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601779737] [2021-04-15 02:28:34,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:28:34,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:34,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:28:34,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:28:34,036 INFO L87 Difference]: Start difference. First operand 60079 states and 179870 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:34,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:34,449 INFO L93 Difference]: Finished difference Result 72590 states and 215734 transitions. [2021-04-15 02:28:34,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:28:34,450 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:28:34,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:34,578 INFO L225 Difference]: With dead ends: 72590 [2021-04-15 02:28:34,578 INFO L226 Difference]: Without dead ends: 72590 [2021-04-15 02:28:34,578 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 169.4ms TimeCoverageRelationStatistics Valid=302, Invalid=510, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:28:34,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72590 states. [2021-04-15 02:28:35,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72590 to 59829. [2021-04-15 02:28:35,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59829 states, 59828 states have (on average 2.9930968777161198) internal successors, (179071), 59828 states have internal predecessors, (179071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:36,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59829 states to 59829 states and 179071 transitions. [2021-04-15 02:28:36,247 INFO L78 Accepts]: Start accepts. Automaton has 59829 states and 179071 transitions. Word has length 25 [2021-04-15 02:28:36,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:36,247 INFO L480 AbstractCegarLoop]: Abstraction has 59829 states and 179071 transitions. [2021-04-15 02:28:36,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:36,247 INFO L276 IsEmpty]: Start isEmpty. Operand 59829 states and 179071 transitions. [2021-04-15 02:28:36,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:28:36,293 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:36,293 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:36,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21860,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:36,494 INFO L428 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:36,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:36,494 INFO L82 PathProgramCache]: Analyzing trace with hash -571181724, now seen corresponding path program 468 times [2021-04-15 02:28:36,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:36,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845616536] [2021-04-15 02:28:36,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:36,578 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:28:36,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845616536] [2021-04-15 02:28:36,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370411705] [2021-04-15 02:28:36,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:36,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:28:36,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:36,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:28:36,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:36,668 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:28:36,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:36,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:28:36,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040618863] [2021-04-15 02:28:36,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:28:36,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:36,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:28:36,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:28:36,669 INFO L87 Difference]: Start difference. First operand 59829 states and 179071 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:37,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:37,139 INFO L93 Difference]: Finished difference Result 93593 states and 280293 transitions. [2021-04-15 02:28:37,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:28:37,140 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:28:37,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:37,311 INFO L225 Difference]: With dead ends: 93593 [2021-04-15 02:28:37,311 INFO L226 Difference]: Without dead ends: 93593 [2021-04-15 02:28:37,312 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 181.3ms TimeCoverageRelationStatistics Valid=293, Invalid=519, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:28:37,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93593 states. [2021-04-15 02:28:38,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93593 to 82993. [2021-04-15 02:28:38,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82993 states, 82992 states have (on average 3.016278677462888) internal successors, (250327), 82992 states have internal predecessors, (250327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:39,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82993 states to 82993 states and 250327 transitions. [2021-04-15 02:28:39,281 INFO L78 Accepts]: Start accepts. Automaton has 82993 states and 250327 transitions. Word has length 25 [2021-04-15 02:28:39,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:39,281 INFO L480 AbstractCegarLoop]: Abstraction has 82993 states and 250327 transitions. [2021-04-15 02:28:39,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:39,281 INFO L276 IsEmpty]: Start isEmpty. Operand 82993 states and 250327 transitions. [2021-04-15 02:28:39,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:28:39,333 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:39,333 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:39,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21861 [2021-04-15 02:28:39,534 INFO L428 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:39,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:39,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1077527990, now seen corresponding path program 469 times [2021-04-15 02:28:39,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:39,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310579171] [2021-04-15 02:28:39,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:39,625 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:39,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310579171] [2021-04-15 02:28:39,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270152767] [2021-04-15 02:28:39,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:39,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:39,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:28:39,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:39,713 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:39,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:39,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-04-15 02:28:39,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305145316] [2021-04-15 02:28:39,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:28:39,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:39,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:28:39,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:28:39,714 INFO L87 Difference]: Start difference. First operand 82993 states and 250327 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:40,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:40,174 INFO L93 Difference]: Finished difference Result 90382 states and 270822 transitions. [2021-04-15 02:28:40,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:28:40,175 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:28:40,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:40,336 INFO L225 Difference]: With dead ends: 90382 [2021-04-15 02:28:40,336 INFO L226 Difference]: Without dead ends: 90382 [2021-04-15 02:28:40,336 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 172.7ms TimeCoverageRelationStatistics Valid=262, Invalid=494, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:28:40,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90382 states. [2021-04-15 02:28:41,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90382 to 81151. [2021-04-15 02:28:41,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81151 states, 81150 states have (on average 3.0145532963647566) internal successors, (244631), 81150 states have internal predecessors, (244631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:41,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81151 states to 81151 states and 244631 transitions. [2021-04-15 02:28:41,995 INFO L78 Accepts]: Start accepts. Automaton has 81151 states and 244631 transitions. Word has length 25 [2021-04-15 02:28:41,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:41,995 INFO L480 AbstractCegarLoop]: Abstraction has 81151 states and 244631 transitions. [2021-04-15 02:28:41,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:41,995 INFO L276 IsEmpty]: Start isEmpty. Operand 81151 states and 244631 transitions. [2021-04-15 02:28:42,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:28:42,044 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:42,044 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:42,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21862 [2021-04-15 02:28:42,245 INFO L428 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:42,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:42,245 INFO L82 PathProgramCache]: Analyzing trace with hash 405606948, now seen corresponding path program 470 times [2021-04-15 02:28:42,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:42,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913725419] [2021-04-15 02:28:42,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:28:42,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913725419] [2021-04-15 02:28:42,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756988582] [2021-04-15 02:28:42,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:42,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:28:42,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:42,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:28:42,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:42,698 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:28:42,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:42,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-04-15 02:28:42,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650904285] [2021-04-15 02:28:42,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:28:42,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:42,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:28:42,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:28:42,699 INFO L87 Difference]: Start difference. First operand 81151 states and 244631 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:43,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:43,311 INFO L93 Difference]: Finished difference Result 141608 states and 426442 transitions. [2021-04-15 02:28:43,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:28:43,311 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:28:43,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:43,624 INFO L225 Difference]: With dead ends: 141608 [2021-04-15 02:28:43,624 INFO L226 Difference]: Without dead ends: 141608 [2021-04-15 02:28:43,624 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 171.8ms TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:28:43,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141608 states. [2021-04-15 02:28:46,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141608 to 133805. [2021-04-15 02:28:46,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133805 states, 133804 states have (on average 3.0223685390571284) internal successors, (404405), 133804 states have internal predecessors, (404405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:46,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133805 states to 133805 states and 404405 transitions. [2021-04-15 02:28:46,534 INFO L78 Accepts]: Start accepts. Automaton has 133805 states and 404405 transitions. Word has length 25 [2021-04-15 02:28:46,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:46,534 INFO L480 AbstractCegarLoop]: Abstraction has 133805 states and 404405 transitions. [2021-04-15 02:28:46,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:46,534 INFO L276 IsEmpty]: Start isEmpty. Operand 133805 states and 404405 transitions. [2021-04-15 02:28:46,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:28:46,609 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:46,609 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:46,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21863,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:46,810 INFO L428 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:46,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:46,810 INFO L82 PathProgramCache]: Analyzing trace with hash -861850230, now seen corresponding path program 471 times [2021-04-15 02:28:46,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:46,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747924242] [2021-04-15 02:28:46,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:46,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:46,916 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:46,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747924242] [2021-04-15 02:28:46,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610377901] [2021-04-15 02:28:46,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:46,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:28:46,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:46,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:28:46,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:47,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:47,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-04-15 02:28:47,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515528661] [2021-04-15 02:28:47,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:28:47,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:47,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:28:47,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:28:47,009 INFO L87 Difference]: Start difference. First operand 133805 states and 404405 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:48,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:48,222 INFO L93 Difference]: Finished difference Result 143196 states and 430987 transitions. [2021-04-15 02:28:48,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:28:48,223 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:28:48,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:48,536 INFO L225 Difference]: With dead ends: 143196 [2021-04-15 02:28:48,536 INFO L226 Difference]: Without dead ends: 143196 [2021-04-15 02:28:48,536 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 690.5ms TimeCoverageRelationStatistics Valid=373, Invalid=749, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 02:28:48,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143196 states. [2021-04-15 02:28:51,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143196 to 132675. [2021-04-15 02:28:51,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132675 states, 132674 states have (on average 3.022378160001206) internal successors, (400991), 132674 states have internal predecessors, (400991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:51,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132675 states to 132675 states and 400991 transitions. [2021-04-15 02:28:51,517 INFO L78 Accepts]: Start accepts. Automaton has 132675 states and 400991 transitions. Word has length 25 [2021-04-15 02:28:51,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:51,517 INFO L480 AbstractCegarLoop]: Abstraction has 132675 states and 400991 transitions. [2021-04-15 02:28:51,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:51,517 INFO L276 IsEmpty]: Start isEmpty. Operand 132675 states and 400991 transitions. [2021-04-15 02:28:51,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:28:51,592 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:51,592 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:51,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21864,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:51,793 INFO L428 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:51,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:51,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1498317084, now seen corresponding path program 472 times [2021-04-15 02:28:51,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:51,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844698353] [2021-04-15 02:28:51,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:51,909 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:51,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844698353] [2021-04-15 02:28:51,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529710363] [2021-04-15 02:28:51,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:51,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:28:51,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:51,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:28:51,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:52,002 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:52,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:52,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-04-15 02:28:52,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448463101] [2021-04-15 02:28:52,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:28:52,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:52,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:28:52,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:28:52,003 INFO L87 Difference]: Start difference. First operand 132675 states and 400991 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:52,796 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-04-15 02:28:53,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:53,537 INFO L93 Difference]: Finished difference Result 189263 states and 569984 transitions. [2021-04-15 02:28:53,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 02:28:53,538 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:28:53,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:53,990 INFO L225 Difference]: With dead ends: 189263 [2021-04-15 02:28:53,990 INFO L226 Difference]: Without dead ends: 189263 [2021-04-15 02:28:53,990 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 845.6ms TimeCoverageRelationStatistics Valid=705, Invalid=1365, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 02:28:54,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189263 states. [2021-04-15 02:28:57,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189263 to 176221. [2021-04-15 02:28:57,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176221 states, 176220 states have (on average 3.024032459425718) internal successors, (532895), 176220 states have internal predecessors, (532895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:58,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176221 states to 176221 states and 532895 transitions. [2021-04-15 02:28:58,231 INFO L78 Accepts]: Start accepts. Automaton has 176221 states and 532895 transitions. Word has length 25 [2021-04-15 02:28:58,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:58,231 INFO L480 AbstractCegarLoop]: Abstraction has 176221 states and 532895 transitions. [2021-04-15 02:28:58,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:58,231 INFO L276 IsEmpty]: Start isEmpty. Operand 176221 states and 532895 transitions. [2021-04-15 02:28:58,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:28:58,311 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:58,311 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:58,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21865 [2021-04-15 02:28:58,512 INFO L428 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:58,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:58,512 INFO L82 PathProgramCache]: Analyzing trace with hash -795211182, now seen corresponding path program 473 times [2021-04-15 02:28:58,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:58,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838991050] [2021-04-15 02:28:58,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:58,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:58,626 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:58,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838991050] [2021-04-15 02:28:58,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399907399] [2021-04-15 02:28:58,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:58,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:28:58,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:58,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:28:58,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:58,711 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:58,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:58,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-04-15 02:28:58,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40287482] [2021-04-15 02:28:58,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:28:58,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:58,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:28:58,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:28:58,712 INFO L87 Difference]: Start difference. First operand 176221 states and 532895 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:00,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:00,303 INFO L93 Difference]: Finished difference Result 207060 states and 624206 transitions. [2021-04-15 02:29:00,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:29:00,304 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:29:00,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:00,797 INFO L225 Difference]: With dead ends: 207060 [2021-04-15 02:29:00,797 INFO L226 Difference]: Without dead ends: 207060 [2021-04-15 02:29:00,798 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 264.1ms TimeCoverageRelationStatistics Valid=459, Invalid=873, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 02:29:00,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207060 states. [2021-04-15 02:29:03,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207060 to 97070. [2021-04-15 02:29:03,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97070 states, 97069 states have (on average 3.0073864982641214) internal successors, (291924), 97069 states have internal predecessors, (291924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:03,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97070 states to 97070 states and 291924 transitions. [2021-04-15 02:29:03,978 INFO L78 Accepts]: Start accepts. Automaton has 97070 states and 291924 transitions. Word has length 25 [2021-04-15 02:29:03,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:03,978 INFO L480 AbstractCegarLoop]: Abstraction has 97070 states and 291924 transitions. [2021-04-15 02:29:03,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:03,978 INFO L276 IsEmpty]: Start isEmpty. Operand 97070 states and 291924 transitions. [2021-04-15 02:29:04,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:29:04,030 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:04,030 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:04,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21866,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:04,231 INFO L428 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:04,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:04,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1239821330, now seen corresponding path program 474 times [2021-04-15 02:29:04,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:04,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506392574] [2021-04-15 02:29:04,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:04,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:04,322 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:04,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506392574] [2021-04-15 02:29:04,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105200794] [2021-04-15 02:29:04,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:04,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:29:04,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:04,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:29:04,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:04,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:04,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-04-15 02:29:04,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597160459] [2021-04-15 02:29:04,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:04,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:04,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:04,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:04,407 INFO L87 Difference]: Start difference. First operand 97070 states and 291924 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:05,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:05,365 INFO L93 Difference]: Finished difference Result 117254 states and 351156 transitions. [2021-04-15 02:29:05,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:29:05,366 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:29:05,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:05,622 INFO L225 Difference]: With dead ends: 117254 [2021-04-15 02:29:05,622 INFO L226 Difference]: Without dead ends: 117253 [2021-04-15 02:29:05,622 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 507.4ms TimeCoverageRelationStatistics Valid=292, Invalid=520, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:29:05,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117253 states. [2021-04-15 02:29:07,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117253 to 97245. [2021-04-15 02:29:07,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97245 states, 97244 states have (on average 3.0071264036855743) internal successors, (292425), 97244 states have internal predecessors, (292425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:07,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97245 states to 97245 states and 292425 transitions. [2021-04-15 02:29:07,609 INFO L78 Accepts]: Start accepts. Automaton has 97245 states and 292425 transitions. Word has length 25 [2021-04-15 02:29:07,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:07,609 INFO L480 AbstractCegarLoop]: Abstraction has 97245 states and 292425 transitions. [2021-04-15 02:29:07,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:07,609 INFO L276 IsEmpty]: Start isEmpty. Operand 97245 states and 292425 transitions. [2021-04-15 02:29:08,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:29:08,090 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:08,090 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:08,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21867,476 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:08,305 INFO L428 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:08,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:08,305 INFO L82 PathProgramCache]: Analyzing trace with hash 733475064, now seen corresponding path program 475 times [2021-04-15 02:29:08,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:08,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855360888] [2021-04-15 02:29:08,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:08,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:08,401 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:08,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855360888] [2021-04-15 02:29:08,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017893440] [2021-04-15 02:29:08,401 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:08,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:29:08,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:08,483 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:08,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:08,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-04-15 02:29:08,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970409594] [2021-04-15 02:29:08,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:08,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:08,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:08,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:08,484 INFO L87 Difference]: Start difference. First operand 97245 states and 292425 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:09,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:09,043 INFO L93 Difference]: Finished difference Result 110340 states and 330613 transitions. [2021-04-15 02:29:09,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:29:09,044 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:29:09,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:09,256 INFO L225 Difference]: With dead ends: 110340 [2021-04-15 02:29:09,256 INFO L226 Difference]: Without dead ends: 110339 [2021-04-15 02:29:09,256 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 170.9ms TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:29:09,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110339 states. [2021-04-15 02:29:10,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110339 to 68102. [2021-04-15 02:29:10,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68102 states, 68101 states have (on average 3.0012187779915127) internal successors, (204386), 68101 states have internal predecessors, (204386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:11,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68102 states to 68102 states and 204386 transitions. [2021-04-15 02:29:11,400 INFO L78 Accepts]: Start accepts. Automaton has 68102 states and 204386 transitions. Word has length 25 [2021-04-15 02:29:11,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:11,400 INFO L480 AbstractCegarLoop]: Abstraction has 68102 states and 204386 transitions. [2021-04-15 02:29:11,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:11,400 INFO L276 IsEmpty]: Start isEmpty. Operand 68102 states and 204386 transitions. [2021-04-15 02:29:11,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:29:11,440 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:11,440 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:11,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21868,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:11,640 INFO L428 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:11,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:11,641 INFO L82 PathProgramCache]: Analyzing trace with hash -2078357294, now seen corresponding path program 476 times [2021-04-15 02:29:11,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:11,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356450038] [2021-04-15 02:29:11,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:11,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:11,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356450038] [2021-04-15 02:29:11,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667000172] [2021-04-15 02:29:11,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:11,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:11,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:11,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:29:11,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:11,827 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:11,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:11,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-04-15 02:29:11,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496171132] [2021-04-15 02:29:11,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:11,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:11,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:11,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:11,828 INFO L87 Difference]: Start difference. First operand 68102 states and 204386 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:12,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:12,309 INFO L93 Difference]: Finished difference Result 95816 states and 286428 transitions. [2021-04-15 02:29:12,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:29:12,310 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:29:12,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:12,492 INFO L225 Difference]: With dead ends: 95816 [2021-04-15 02:29:12,493 INFO L226 Difference]: Without dead ends: 95815 [2021-04-15 02:29:12,493 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 162.3ms TimeCoverageRelationStatistics Valid=205, Invalid=445, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:29:12,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95815 states. [2021-04-15 02:29:14,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95815 to 81199. [2021-04-15 02:29:14,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81199 states, 81198 states have (on average 3.002746373063376) internal successors, (243817), 81198 states have internal predecessors, (243817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:14,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81199 states to 81199 states and 243817 transitions. [2021-04-15 02:29:14,613 INFO L78 Accepts]: Start accepts. Automaton has 81199 states and 243817 transitions. Word has length 25 [2021-04-15 02:29:14,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:14,613 INFO L480 AbstractCegarLoop]: Abstraction has 81199 states and 243817 transitions. [2021-04-15 02:29:14,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:14,613 INFO L276 IsEmpty]: Start isEmpty. Operand 81199 states and 243817 transitions. [2021-04-15 02:29:14,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:29:14,663 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:14,664 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:14,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21869 [2021-04-15 02:29:14,864 INFO L428 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:14,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:14,864 INFO L82 PathProgramCache]: Analyzing trace with hash 949152824, now seen corresponding path program 477 times [2021-04-15 02:29:14,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:14,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455800797] [2021-04-15 02:29:14,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:14,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:14,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455800797] [2021-04-15 02:29:14,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483529045] [2021-04-15 02:29:14,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:14,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:29:14,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:14,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:29:15,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:15,063 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:15,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:15,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-04-15 02:29:15,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416719677] [2021-04-15 02:29:15,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:29:15,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:15,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:29:15,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:15,064 INFO L87 Difference]: Start difference. First operand 81199 states and 243817 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:15,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:15,655 INFO L93 Difference]: Finished difference Result 99184 states and 296306 transitions. [2021-04-15 02:29:15,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:29:15,656 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:29:15,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:15,857 INFO L225 Difference]: With dead ends: 99184 [2021-04-15 02:29:15,858 INFO L226 Difference]: Without dead ends: 99184 [2021-04-15 02:29:15,858 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 241.5ms TimeCoverageRelationStatistics Valid=372, Invalid=750, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 02:29:15,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99184 states. [2021-04-15 02:29:17,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99184 to 51922. [2021-04-15 02:29:17,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51922 states, 51921 states have (on average 2.997496196144142) internal successors, (155633), 51921 states have internal predecessors, (155633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:17,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51922 states to 51922 states and 155633 transitions. [2021-04-15 02:29:17,844 INFO L78 Accepts]: Start accepts. Automaton has 51922 states and 155633 transitions. Word has length 25 [2021-04-15 02:29:17,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:17,844 INFO L480 AbstractCegarLoop]: Abstraction has 51922 states and 155633 transitions. [2021-04-15 02:29:17,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:17,844 INFO L276 IsEmpty]: Start isEmpty. Operand 51922 states and 155633 transitions. [2021-04-15 02:29:17,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:29:17,877 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:17,877 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:18,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21870 [2021-04-15 02:29:18,077 INFO L428 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:18,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:18,078 INFO L82 PathProgramCache]: Analyzing trace with hash 312685970, now seen corresponding path program 478 times [2021-04-15 02:29:18,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:18,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013197705] [2021-04-15 02:29:18,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:18,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:18,197 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:18,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013197705] [2021-04-15 02:29:18,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198577558] [2021-04-15 02:29:18,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:18,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:18,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:18,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:29:18,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:18,283 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:18,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:18,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-04-15 02:29:18,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813962357] [2021-04-15 02:29:18,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:29:18,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:18,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:29:18,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:18,284 INFO L87 Difference]: Start difference. First operand 51922 states and 155633 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:18,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:18,907 INFO L93 Difference]: Finished difference Result 71392 states and 212338 transitions. [2021-04-15 02:29:18,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 02:29:18,908 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:29:18,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:19,027 INFO L225 Difference]: With dead ends: 71392 [2021-04-15 02:29:19,027 INFO L226 Difference]: Without dead ends: 71392 [2021-04-15 02:29:19,028 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 382.2ms TimeCoverageRelationStatistics Valid=704, Invalid=1366, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 02:29:19,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71392 states. [2021-04-15 02:29:19,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71392 to 37505. [2021-04-15 02:29:19,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37505 states, 37504 states have (on average 3.01471843003413) internal successors, (113064), 37504 states have internal predecessors, (113064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:20,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37505 states to 37505 states and 113064 transitions. [2021-04-15 02:29:20,018 INFO L78 Accepts]: Start accepts. Automaton has 37505 states and 113064 transitions. Word has length 25 [2021-04-15 02:29:20,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:20,018 INFO L480 AbstractCegarLoop]: Abstraction has 37505 states and 113064 transitions. [2021-04-15 02:29:20,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:20,019 INFO L276 IsEmpty]: Start isEmpty. Operand 37505 states and 113064 transitions. [2021-04-15 02:29:20,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:29:20,047 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:20,047 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:20,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21871 [2021-04-15 02:29:20,248 INFO L428 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:20,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:20,248 INFO L82 PathProgramCache]: Analyzing trace with hash -539568852, now seen corresponding path program 479 times [2021-04-15 02:29:20,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:20,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364790762] [2021-04-15 02:29:20,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:20,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:20,351 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:20,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364790762] [2021-04-15 02:29:20,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177602667] [2021-04-15 02:29:20,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:20,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:29:20,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:20,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:29:20,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:20,435 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:20,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:20,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-04-15 02:29:20,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953522246] [2021-04-15 02:29:20,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:20,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:20,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:20,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:20,435 INFO L87 Difference]: Start difference. First operand 37505 states and 113064 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:20,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:20,714 INFO L93 Difference]: Finished difference Result 52340 states and 156866 transitions. [2021-04-15 02:29:20,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:29:20,715 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:29:20,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:20,807 INFO L225 Difference]: With dead ends: 52340 [2021-04-15 02:29:20,808 INFO L226 Difference]: Without dead ends: 52340 [2021-04-15 02:29:20,808 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 143.9ms TimeCoverageRelationStatistics Valid=174, Invalid=378, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:29:20,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52340 states. [2021-04-15 02:29:21,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52340 to 51574. [2021-04-15 02:29:21,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51574 states, 51573 states have (on average 3.01365055358424) internal successors, (155423), 51573 states have internal predecessors, (155423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:21,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51574 states to 51574 states and 155423 transitions. [2021-04-15 02:29:21,778 INFO L78 Accepts]: Start accepts. Automaton has 51574 states and 155423 transitions. Word has length 25 [2021-04-15 02:29:21,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:21,778 INFO L480 AbstractCegarLoop]: Abstraction has 51574 states and 155423 transitions. [2021-04-15 02:29:21,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:21,778 INFO L276 IsEmpty]: Start isEmpty. Operand 51574 states and 155423 transitions. [2021-04-15 02:29:21,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:29:21,817 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:21,817 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:22,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 481 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21872 [2021-04-15 02:29:22,018 INFO L428 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:22,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:22,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1807026030, now seen corresponding path program 480 times [2021-04-15 02:29:22,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:22,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130278062] [2021-04-15 02:29:22,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:22,134 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:22,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130278062] [2021-04-15 02:29:22,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299063282] [2021-04-15 02:29:22,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:22,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:29:22,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:22,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:29:22,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:22,220 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:22,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:22,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-04-15 02:29:22,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151533472] [2021-04-15 02:29:22,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:29:22,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:22,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:29:22,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:22,221 INFO L87 Difference]: Start difference. First operand 51574 states and 155423 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:22,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:22,595 INFO L93 Difference]: Finished difference Result 53707 states and 160765 transitions. [2021-04-15 02:29:22,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:29:22,596 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:29:22,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:22,689 INFO L225 Difference]: With dead ends: 53707 [2021-04-15 02:29:22,690 INFO L226 Difference]: Without dead ends: 53707 [2021-04-15 02:29:22,690 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 224.0ms TimeCoverageRelationStatistics Valid=329, Invalid=663, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:29:22,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53707 states. [2021-04-15 02:29:23,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53707 to 50319. [2021-04-15 02:29:23,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50319 states, 50318 states have (on average 3.013335188203029) internal successors, (151625), 50318 states have internal predecessors, (151625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:23,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50319 states to 50319 states and 151625 transitions. [2021-04-15 02:29:23,714 INFO L78 Accepts]: Start accepts. Automaton has 50319 states and 151625 transitions. Word has length 25 [2021-04-15 02:29:23,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:23,714 INFO L480 AbstractCegarLoop]: Abstraction has 50319 states and 151625 transitions. [2021-04-15 02:29:23,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:23,714 INFO L276 IsEmpty]: Start isEmpty. Operand 50319 states and 151625 transitions. [2021-04-15 02:29:23,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:29:23,753 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:23,753 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:23,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21873 [2021-04-15 02:29:23,953 INFO L428 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:23,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:23,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1851474412, now seen corresponding path program 481 times [2021-04-15 02:29:23,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:23,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570282159] [2021-04-15 02:29:23,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:24,080 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:24,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570282159] [2021-04-15 02:29:24,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770354901] [2021-04-15 02:29:24,080 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:24,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:29:24,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:24,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:24,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-04-15 02:29:24,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882642263] [2021-04-15 02:29:24,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:29:24,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:24,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:29:24,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:24,163 INFO L87 Difference]: Start difference. First operand 50319 states and 151625 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:24,799 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-04-15 02:29:25,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:25,096 INFO L93 Difference]: Finished difference Result 83659 states and 251011 transitions. [2021-04-15 02:29:25,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:29:25,097 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:29:25,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:25,275 INFO L225 Difference]: With dead ends: 83659 [2021-04-15 02:29:25,275 INFO L226 Difference]: Without dead ends: 83659 [2021-04-15 02:29:25,276 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 653.5ms TimeCoverageRelationStatistics Valid=647, Invalid=1245, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 02:29:25,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83659 states. [2021-04-15 02:29:26,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83659 to 76370. [2021-04-15 02:29:26,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76370 states, 76369 states have (on average 3.019720043473137) internal successors, (230613), 76369 states have internal predecessors, (230613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:26,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76370 states to 76370 states and 230613 transitions. [2021-04-15 02:29:26,712 INFO L78 Accepts]: Start accepts. Automaton has 76370 states and 230613 transitions. Word has length 25 [2021-04-15 02:29:26,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:26,713 INFO L480 AbstractCegarLoop]: Abstraction has 76370 states and 230613 transitions. [2021-04-15 02:29:26,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:26,713 INFO L276 IsEmpty]: Start isEmpty. Operand 76370 states and 230613 transitions. [2021-04-15 02:29:26,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:29:26,758 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:26,758 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:26,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21874,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:26,959 INFO L428 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:26,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:26,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1146928558, now seen corresponding path program 482 times [2021-04-15 02:29:26,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:26,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252591163] [2021-04-15 02:29:26,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:26,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:27,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252591163] [2021-04-15 02:29:27,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714563001] [2021-04-15 02:29:27,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:27,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:27,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:27,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:29:27,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:27,166 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:27,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:27,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-04-15 02:29:27,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386014045] [2021-04-15 02:29:27,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:29:27,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:27,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:29:27,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:27,167 INFO L87 Difference]: Start difference. First operand 76370 states and 230613 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:28,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:28,422 INFO L93 Difference]: Finished difference Result 149041 states and 447830 transitions. [2021-04-15 02:29:28,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:29:28,423 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:29:28,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:28,750 INFO L225 Difference]: With dead ends: 149041 [2021-04-15 02:29:28,750 INFO L226 Difference]: Without dead ends: 149041 [2021-04-15 02:29:28,750 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 331.1ms TimeCoverageRelationStatistics Valid=554, Invalid=1086, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 02:29:28,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149041 states. [2021-04-15 02:29:31,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149041 to 142483. [2021-04-15 02:29:31,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142483 states, 142482 states have (on average 3.0140017686444605) internal successors, (429441), 142482 states have internal predecessors, (429441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:31,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142483 states to 142483 states and 429441 transitions. [2021-04-15 02:29:31,566 INFO L78 Accepts]: Start accepts. Automaton has 142483 states and 429441 transitions. Word has length 25 [2021-04-15 02:29:31,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:31,566 INFO L480 AbstractCegarLoop]: Abstraction has 142483 states and 429441 transitions. [2021-04-15 02:29:31,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:31,566 INFO L276 IsEmpty]: Start isEmpty. Operand 142483 states and 429441 transitions. [2021-04-15 02:29:31,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:29:31,645 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:31,645 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:31,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21875 [2021-04-15 02:29:31,845 INFO L428 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:31,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:31,845 INFO L82 PathProgramCache]: Analyzing trace with hash -444781362, now seen corresponding path program 483 times [2021-04-15 02:29:31,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:31,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398209978] [2021-04-15 02:29:31,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:31,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398209978] [2021-04-15 02:29:31,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670876246] [2021-04-15 02:29:31,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:31,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:29:31,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:31,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:29:31,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:32,011 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:32,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:32,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:29:32,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718947765] [2021-04-15 02:29:32,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:32,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:32,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:32,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:32,011 INFO L87 Difference]: Start difference. First operand 142483 states and 429441 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:33,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:33,272 INFO L93 Difference]: Finished difference Result 142894 states and 429992 transitions. [2021-04-15 02:29:33,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:29:33,273 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:29:33,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:33,628 INFO L225 Difference]: With dead ends: 142894 [2021-04-15 02:29:33,628 INFO L226 Difference]: Without dead ends: 142890 [2021-04-15 02:29:33,628 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 152.1ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:29:33,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142890 states. [2021-04-15 02:29:36,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142890 to 142503. [2021-04-15 02:29:36,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142503 states, 142502 states have (on average 3.0139226116124687) internal successors, (429490), 142502 states have internal predecessors, (429490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:36,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142503 states to 142503 states and 429490 transitions. [2021-04-15 02:29:36,583 INFO L78 Accepts]: Start accepts. Automaton has 142503 states and 429490 transitions. Word has length 25 [2021-04-15 02:29:36,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:36,583 INFO L480 AbstractCegarLoop]: Abstraction has 142503 states and 429490 transitions. [2021-04-15 02:29:36,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:36,583 INFO L276 IsEmpty]: Start isEmpty. Operand 142503 states and 429490 transitions. [2021-04-15 02:29:36,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:29:36,657 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:36,657 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:36,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21876,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:36,858 INFO L428 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:36,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:36,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1272967698, now seen corresponding path program 484 times [2021-04-15 02:29:36,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:36,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447858424] [2021-04-15 02:29:36,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:36,934 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:36,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447858424] [2021-04-15 02:29:36,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307798350] [2021-04-15 02:29:36,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:36,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:36,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:36,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:29:36,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:37,021 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:37,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:37,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:29:37,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748753933] [2021-04-15 02:29:37,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:37,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:37,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:37,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:37,022 INFO L87 Difference]: Start difference. First operand 142503 states and 429490 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:37,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:37,694 INFO L93 Difference]: Finished difference Result 152571 states and 458598 transitions. [2021-04-15 02:29:37,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:29:37,695 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:29:37,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:38,681 INFO L225 Difference]: With dead ends: 152571 [2021-04-15 02:29:38,682 INFO L226 Difference]: Without dead ends: 152571 [2021-04-15 02:29:38,682 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 120.6ms TimeCoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:29:38,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152571 states. [2021-04-15 02:29:41,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152571 to 142516. [2021-04-15 02:29:41,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142516 states, 142515 states have (on average 3.0138722239764237) internal successors, (429522), 142515 states have internal predecessors, (429522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:41,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142516 states to 142516 states and 429522 transitions. [2021-04-15 02:29:41,710 INFO L78 Accepts]: Start accepts. Automaton has 142516 states and 429522 transitions. Word has length 25 [2021-04-15 02:29:41,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:41,710 INFO L480 AbstractCegarLoop]: Abstraction has 142516 states and 429522 transitions. [2021-04-15 02:29:41,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:41,710 INFO L276 IsEmpty]: Start isEmpty. Operand 142516 states and 429522 transitions. [2021-04-15 02:29:41,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:29:41,788 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:41,788 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:41,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21877,486 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:41,988 INFO L428 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:41,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:41,988 INFO L82 PathProgramCache]: Analyzing trace with hash -456079636, now seen corresponding path program 485 times [2021-04-15 02:29:41,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:41,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197386236] [2021-04-15 02:29:41,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:42,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197386236] [2021-04-15 02:29:42,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121059357] [2021-04-15 02:29:42,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:42,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:29:42,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:42,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:29:42,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:42,159 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:42,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:42,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:29:42,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469525231] [2021-04-15 02:29:42,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:42,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:42,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:42,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:42,161 INFO L87 Difference]: Start difference. First operand 142516 states and 429522 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:43,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:43,558 INFO L93 Difference]: Finished difference Result 161991 states and 486545 transitions. [2021-04-15 02:29:43,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:29:43,559 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:29:43,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:43,971 INFO L225 Difference]: With dead ends: 161991 [2021-04-15 02:29:43,971 INFO L226 Difference]: Without dead ends: 161991 [2021-04-15 02:29:43,971 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 191.2ms TimeCoverageRelationStatistics Valid=282, Invalid=474, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:29:44,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161991 states. [2021-04-15 02:29:46,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161991 to 134941. [2021-04-15 02:29:46,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134941 states, 134940 states have (on average 3.012390692159478) internal successors, (406492), 134940 states have internal predecessors, (406492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:46,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134941 states to 134941 states and 406492 transitions. [2021-04-15 02:29:46,814 INFO L78 Accepts]: Start accepts. Automaton has 134941 states and 406492 transitions. Word has length 25 [2021-04-15 02:29:46,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:46,814 INFO L480 AbstractCegarLoop]: Abstraction has 134941 states and 406492 transitions. [2021-04-15 02:29:46,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:46,814 INFO L276 IsEmpty]: Start isEmpty. Operand 134941 states and 406492 transitions. [2021-04-15 02:29:46,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:29:46,887 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:46,887 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:47,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21878,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:47,087 INFO L428 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:47,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:47,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1778027858, now seen corresponding path program 486 times [2021-04-15 02:29:47,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:47,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591745597] [2021-04-15 02:29:47,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:47,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:47,174 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:47,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591745597] [2021-04-15 02:29:47,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430751898] [2021-04-15 02:29:47,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:47,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:29:47,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:47,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:29:47,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:47,262 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:47,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:47,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:29:47,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596965321] [2021-04-15 02:29:47,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:47,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:47,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:47,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:47,263 INFO L87 Difference]: Start difference. First operand 134941 states and 406492 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:48,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:48,940 INFO L93 Difference]: Finished difference Result 190874 states and 573960 transitions. [2021-04-15 02:29:48,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:29:48,941 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:29:48,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:49,560 INFO L225 Difference]: With dead ends: 190874 [2021-04-15 02:29:49,560 INFO L226 Difference]: Without dead ends: 190874 [2021-04-15 02:29:49,560 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 203.7ms TimeCoverageRelationStatistics Valid=335, Invalid=595, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:29:49,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190874 states. [2021-04-15 02:29:52,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190874 to 166083. [2021-04-15 02:29:52,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166083 states, 166082 states have (on average 3.0187678375742104) internal successors, (501363), 166082 states have internal predecessors, (501363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:53,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166083 states to 166083 states and 501363 transitions. [2021-04-15 02:29:53,636 INFO L78 Accepts]: Start accepts. Automaton has 166083 states and 501363 transitions. Word has length 25 [2021-04-15 02:29:53,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:53,636 INFO L480 AbstractCegarLoop]: Abstraction has 166083 states and 501363 transitions. [2021-04-15 02:29:53,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:53,636 INFO L276 IsEmpty]: Start isEmpty. Operand 166083 states and 501363 transitions. [2021-04-15 02:29:53,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:29:53,730 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:53,730 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:53,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21879 [2021-04-15 02:29:53,936 INFO L428 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:53,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:53,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1979083860, now seen corresponding path program 487 times [2021-04-15 02:29:53,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:53,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544773375] [2021-04-15 02:29:53,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:54,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544773375] [2021-04-15 02:29:54,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814452561] [2021-04-15 02:29:54,037 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:54,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:29:54,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:54,125 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:54,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:54,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-04-15 02:29:54,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215887928] [2021-04-15 02:29:54,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:54,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:54,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:54,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:54,126 INFO L87 Difference]: Start difference. First operand 166083 states and 501363 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:55,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:55,034 INFO L93 Difference]: Finished difference Result 187568 states and 564047 transitions. [2021-04-15 02:29:55,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:29:55,035 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:29:55,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:55,494 INFO L225 Difference]: With dead ends: 187568 [2021-04-15 02:29:55,495 INFO L226 Difference]: Without dead ends: 187568 [2021-04-15 02:29:55,495 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 238.0ms TimeCoverageRelationStatistics Valid=378, Invalid=678, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:29:55,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187568 states. [2021-04-15 02:29:58,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187568 to 137430. [2021-04-15 02:29:59,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137430 states, 137429 states have (on average 3.0178492166864346) internal successors, (414740), 137429 states have internal predecessors, (414740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:59,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137430 states to 137430 states and 414740 transitions. [2021-04-15 02:29:59,445 INFO L78 Accepts]: Start accepts. Automaton has 137430 states and 414740 transitions. Word has length 25 [2021-04-15 02:29:59,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:59,445 INFO L480 AbstractCegarLoop]: Abstraction has 137430 states and 414740 transitions. [2021-04-15 02:29:59,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:59,445 INFO L276 IsEmpty]: Start isEmpty. Operand 137430 states and 414740 transitions. [2021-04-15 02:29:59,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:29:59,527 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:59,527 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:59,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 489 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21880 [2021-04-15 02:29:59,727 INFO L428 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:59,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:59,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1809537170, now seen corresponding path program 488 times [2021-04-15 02:29:59,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:59,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831427315] [2021-04-15 02:29:59,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:59,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831427315] [2021-04-15 02:29:59,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157020226] [2021-04-15 02:29:59,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:59,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:59,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:59,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:29:59,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:59,913 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:59,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:59,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-04-15 02:29:59,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482871722] [2021-04-15 02:29:59,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:59,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:59,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:59,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:59,914 INFO L87 Difference]: Start difference. First operand 137430 states and 414740 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:01,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:01,500 INFO L93 Difference]: Finished difference Result 196837 states and 592516 transitions. [2021-04-15 02:30:01,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:30:01,501 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:30:01,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:02,023 INFO L225 Difference]: With dead ends: 196837 [2021-04-15 02:30:02,024 INFO L226 Difference]: Without dead ends: 196837 [2021-04-15 02:30:02,024 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=346, Invalid=646, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:30:02,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196837 states. [2021-04-15 02:30:05,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196837 to 188376. [2021-04-15 02:30:06,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188376 states, 188375 states have (on average 3.0179960185799604) internal successors, (568515), 188375 states have internal predecessors, (568515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:06,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188376 states to 188376 states and 568515 transitions. [2021-04-15 02:30:06,740 INFO L78 Accepts]: Start accepts. Automaton has 188376 states and 568515 transitions. Word has length 25 [2021-04-15 02:30:06,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:06,740 INFO L480 AbstractCegarLoop]: Abstraction has 188376 states and 568515 transitions. [2021-04-15 02:30:06,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:06,740 INFO L276 IsEmpty]: Start isEmpty. Operand 188376 states and 568515 transitions. [2021-04-15 02:30:06,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:30:06,828 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:06,828 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:07,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21881 [2021-04-15 02:30:07,028 INFO L428 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:07,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:07,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1002295188, now seen corresponding path program 489 times [2021-04-15 02:30:07,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:07,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162440981] [2021-04-15 02:30:07,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:07,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:07,141 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:07,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162440981] [2021-04-15 02:30:07,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678190964] [2021-04-15 02:30:07,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:07,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:30:07,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:07,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:30:07,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:07,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:07,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-04-15 02:30:07,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122297900] [2021-04-15 02:30:07,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:30:07,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:07,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:30:07,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:30:07,235 INFO L87 Difference]: Start difference. First operand 188376 states and 568515 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:08,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:08,868 INFO L93 Difference]: Finished difference Result 194807 states and 586573 transitions. [2021-04-15 02:30:08,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:30:08,873 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:30:08,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:09,291 INFO L225 Difference]: With dead ends: 194807 [2021-04-15 02:30:09,291 INFO L226 Difference]: Without dead ends: 194807 [2021-04-15 02:30:09,291 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 216.2ms TimeCoverageRelationStatistics Valid=291, Invalid=579, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:30:09,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194807 states. [2021-04-15 02:30:12,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194807 to 176201. [2021-04-15 02:30:12,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176201 states, 176200 states have (on average 3.0188251986379115) internal successors, (531917), 176200 states have internal predecessors, (531917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:13,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176201 states to 176201 states and 531917 transitions. [2021-04-15 02:30:13,792 INFO L78 Accepts]: Start accepts. Automaton has 176201 states and 531917 transitions. Word has length 25 [2021-04-15 02:30:13,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:13,792 INFO L480 AbstractCegarLoop]: Abstraction has 176201 states and 531917 transitions. [2021-04-15 02:30:13,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:13,792 INFO L276 IsEmpty]: Start isEmpty. Operand 176201 states and 531917 transitions. [2021-04-15 02:30:13,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:30:13,882 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:13,882 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:14,082 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21882,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:14,082 INFO L428 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:14,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:14,082 INFO L82 PathProgramCache]: Analyzing trace with hash 2025214930, now seen corresponding path program 490 times [2021-04-15 02:30:14,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:14,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403773689] [2021-04-15 02:30:14,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:14,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:14,198 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:14,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403773689] [2021-04-15 02:30:14,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732581225] [2021-04-15 02:30:14,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:14,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:30:14,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:14,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:30:14,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:14,284 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:14,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:14,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-04-15 02:30:14,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315099001] [2021-04-15 02:30:14,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:30:14,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:14,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:30:14,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:30:14,285 INFO L87 Difference]: Start difference. First operand 176201 states and 531917 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:15,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:15,324 INFO L93 Difference]: Finished difference Result 217693 states and 655300 transitions. [2021-04-15 02:30:15,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:30:15,325 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:30:15,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:16,598 INFO L225 Difference]: With dead ends: 217693 [2021-04-15 02:30:16,598 INFO L226 Difference]: Without dead ends: 217693 [2021-04-15 02:30:16,598 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 206.4ms TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:30:16,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217693 states. [2021-04-15 02:30:20,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217693 to 216490. [2021-04-15 02:30:20,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216490 states, 216489 states have (on average 3.015173981126062) internal successors, (652752), 216489 states have internal predecessors, (652752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:21,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216490 states to 216490 states and 652752 transitions. [2021-04-15 02:30:21,319 INFO L78 Accepts]: Start accepts. Automaton has 216490 states and 652752 transitions. Word has length 25 [2021-04-15 02:30:21,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:21,319 INFO L480 AbstractCegarLoop]: Abstraction has 216490 states and 652752 transitions. [2021-04-15 02:30:21,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:21,319 INFO L276 IsEmpty]: Start isEmpty. Operand 216490 states and 652752 transitions. [2021-04-15 02:30:21,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:30:21,413 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:21,413 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:21,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21883 [2021-04-15 02:30:21,614 INFO L428 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:21,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:21,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1388748076, now seen corresponding path program 491 times [2021-04-15 02:30:21,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:21,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345981511] [2021-04-15 02:30:21,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:21,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:21,744 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:21,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345981511] [2021-04-15 02:30:21,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274062571] [2021-04-15 02:30:21,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:21,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:30:21,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:21,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:30:21,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:21,837 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:21,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:21,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-04-15 02:30:21,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652264090] [2021-04-15 02:30:21,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:30:21,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:21,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:30:21,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:30:21,837 INFO L87 Difference]: Start difference. First operand 216490 states and 652752 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:23,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:23,688 INFO L93 Difference]: Finished difference Result 218270 states and 656956 transitions. [2021-04-15 02:30:23,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:30:23,689 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:30:23,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:24,253 INFO L225 Difference]: With dead ends: 218270 [2021-04-15 02:30:24,254 INFO L226 Difference]: Without dead ends: 218270 [2021-04-15 02:30:24,254 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 309.0ms TimeCoverageRelationStatistics Valid=455, Invalid=951, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 02:30:24,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218270 states. [2021-04-15 02:30:28,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218270 to 215575. [2021-04-15 02:30:28,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215575 states, 215574 states have (on average 3.0152337480401163) internal successors, (650006), 215574 states have internal predecessors, (650006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:29,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215575 states to 215575 states and 650006 transitions. [2021-04-15 02:30:29,726 INFO L78 Accepts]: Start accepts. Automaton has 215575 states and 650006 transitions. Word has length 25 [2021-04-15 02:30:29,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:29,726 INFO L480 AbstractCegarLoop]: Abstraction has 215575 states and 650006 transitions. [2021-04-15 02:30:29,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:29,727 INFO L276 IsEmpty]: Start isEmpty. Operand 215575 states and 650006 transitions. [2021-04-15 02:30:29,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:30:29,842 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:29,842 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:30,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21884,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:30,043 INFO L428 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:30,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:30,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1161855214, now seen corresponding path program 492 times [2021-04-15 02:30:30,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:30,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930750946] [2021-04-15 02:30:30,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:30,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:30,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930750946] [2021-04-15 02:30:30,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986542434] [2021-04-15 02:30:30,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:30,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:30:30,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:30,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:30:30,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:30,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:30,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-04-15 02:30:30,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693836649] [2021-04-15 02:30:30,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:30:30,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:30,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:30:30,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:30:30,275 INFO L87 Difference]: Start difference. First operand 215575 states and 650006 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:31,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:31,556 INFO L93 Difference]: Finished difference Result 228955 states and 688973 transitions. [2021-04-15 02:30:31,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 02:30:31,557 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:30:31,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:32,803 INFO L225 Difference]: With dead ends: 228955 [2021-04-15 02:30:32,803 INFO L226 Difference]: Without dead ends: 228955 [2021-04-15 02:30:32,803 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 463.7ms TimeCoverageRelationStatistics Valid=791, Invalid=1561, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 02:30:32,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228955 states. [2021-04-15 02:30:36,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228955 to 226618. [2021-04-15 02:30:36,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226618 states, 226617 states have (on average 3.0145929034450196) internal successors, (683158), 226617 states have internal predecessors, (683158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:37,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226618 states to 226618 states and 683158 transitions. [2021-04-15 02:30:37,642 INFO L78 Accepts]: Start accepts. Automaton has 226618 states and 683158 transitions. Word has length 25 [2021-04-15 02:30:37,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:37,642 INFO L480 AbstractCegarLoop]: Abstraction has 226618 states and 683158 transitions. [2021-04-15 02:30:37,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:37,642 INFO L276 IsEmpty]: Start isEmpty. Operand 226618 states and 683158 transitions. [2021-04-15 02:30:37,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:30:37,726 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:37,726 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:37,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21885 [2021-04-15 02:30:37,926 INFO L428 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:37,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:37,926 INFO L82 PathProgramCache]: Analyzing trace with hash 745684742, now seen corresponding path program 493 times [2021-04-15 02:30:37,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:37,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776475269] [2021-04-15 02:30:37,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:38,079 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:38,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776475269] [2021-04-15 02:30:38,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989501414] [2021-04-15 02:30:38,080 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:38,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:38,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:30:38,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:38,761 WARN L205 SmtUtils]: Spent 627.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-04-15 02:30:38,825 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 17 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:38,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:38,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-04-15 02:30:38,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590723327] [2021-04-15 02:30:38,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:30:38,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:38,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:30:38,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:30:38,826 INFO L87 Difference]: Start difference. First operand 226618 states and 683158 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:40,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:40,078 INFO L93 Difference]: Finished difference Result 227249 states and 684138 transitions. [2021-04-15 02:30:40,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:30:40,079 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:30:40,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:40,674 INFO L225 Difference]: With dead ends: 227249 [2021-04-15 02:30:40,674 INFO L226 Difference]: Without dead ends: 227239 [2021-04-15 02:30:40,675 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 372.0ms TimeCoverageRelationStatistics Valid=419, Invalid=841, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 02:30:40,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227239 states. [2021-04-15 02:30:45,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227239 to 226674. [2021-04-15 02:30:45,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226674 states, 226673 states have (on average 3.0146334146545906) internal successors, (683336), 226673 states have internal predecessors, (683336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:46,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226674 states to 226674 states and 683336 transitions. [2021-04-15 02:30:46,599 INFO L78 Accepts]: Start accepts. Automaton has 226674 states and 683336 transitions. Word has length 25 [2021-04-15 02:30:46,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:46,599 INFO L480 AbstractCegarLoop]: Abstraction has 226674 states and 683336 transitions. [2021-04-15 02:30:46,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:46,599 INFO L276 IsEmpty]: Start isEmpty. Operand 226674 states and 683336 transitions. [2021-04-15 02:30:46,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:30:46,692 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:46,692 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:46,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21886 [2021-04-15 02:30:46,892 INFO L428 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:46,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:46,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1539991964, now seen corresponding path program 494 times [2021-04-15 02:30:46,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:46,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312327341] [2021-04-15 02:30:46,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:46,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:47,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312327341] [2021-04-15 02:30:47,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663389447] [2021-04-15 02:30:47,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:47,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:30:47,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:47,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:30:47,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:47,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:47,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-04-15 02:30:47,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60769850] [2021-04-15 02:30:47,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:30:47,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:47,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:30:47,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:30:47,089 INFO L87 Difference]: Start difference. First operand 226674 states and 683336 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:48,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:48,932 INFO L93 Difference]: Finished difference Result 282714 states and 850818 transitions. [2021-04-15 02:30:48,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:30:48,933 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:30:48,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:49,514 INFO L225 Difference]: With dead ends: 282714 [2021-04-15 02:30:49,514 INFO L226 Difference]: Without dead ends: 282711 [2021-04-15 02:30:49,514 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 154.1ms TimeCoverageRelationStatistics Valid=173, Invalid=379, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:30:49,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282711 states. [2021-04-15 02:30:54,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282711 to 259064. [2021-04-15 02:30:54,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259064 states, 259063 states have (on average 3.0122711464006824) internal successors, (780368), 259063 states have internal predecessors, (780368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:55,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259064 states to 259064 states and 780368 transitions. [2021-04-15 02:30:55,362 INFO L78 Accepts]: Start accepts. Automaton has 259064 states and 780368 transitions. Word has length 25 [2021-04-15 02:30:55,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:55,362 INFO L480 AbstractCegarLoop]: Abstraction has 259064 states and 780368 transitions. [2021-04-15 02:30:55,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:55,362 INFO L276 IsEmpty]: Start isEmpty. Operand 259064 states and 780368 transitions. [2021-04-15 02:30:56,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:30:56,258 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:56,258 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:56,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21887,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:56,489 INFO L428 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:56,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:56,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1487518154, now seen corresponding path program 495 times [2021-04-15 02:30:56,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:56,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952048976] [2021-04-15 02:30:56,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:56,611 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:56,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952048976] [2021-04-15 02:30:56,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417317074] [2021-04-15 02:30:56,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:56,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:30:56,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:56,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:30:56,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:56,701 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:56,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:56,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-04-15 02:30:56,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705788917] [2021-04-15 02:30:56,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:30:56,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:56,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:30:56,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:30:56,702 INFO L87 Difference]: Start difference. First operand 259064 states and 780368 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:58,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:58,525 INFO L93 Difference]: Finished difference Result 293908 states and 884190 transitions. [2021-04-15 02:30:58,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:30:58,526 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:30:58,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:59,382 INFO L225 Difference]: With dead ends: 293908 [2021-04-15 02:30:59,382 INFO L226 Difference]: Without dead ends: 293908 [2021-04-15 02:30:59,382 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 230.4ms TimeCoverageRelationStatistics Valid=328, Invalid=664, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:30:59,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293908 states. [2021-04-15 02:31:03,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293908 to 161560. [2021-04-15 02:31:03,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161560 states, 161559 states have (on average 3.0078423362362976) internal successors, (485944), 161559 states have internal predecessors, (485944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:04,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161560 states to 161560 states and 485944 transitions. [2021-04-15 02:31:04,493 INFO L78 Accepts]: Start accepts. Automaton has 161560 states and 485944 transitions. Word has length 25 [2021-04-15 02:31:04,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:04,493 INFO L480 AbstractCegarLoop]: Abstraction has 161560 states and 485944 transitions. [2021-04-15 02:31:04,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:04,493 INFO L276 IsEmpty]: Start isEmpty. Operand 161560 states and 485944 transitions. [2021-04-15 02:31:04,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:31:04,575 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:04,575 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:04,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21888 [2021-04-15 02:31:04,776 INFO L428 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:04,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:04,776 INFO L82 PathProgramCache]: Analyzing trace with hash 851051300, now seen corresponding path program 496 times [2021-04-15 02:31:04,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:04,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855494080] [2021-04-15 02:31:04,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:04,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:04,904 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:04,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855494080] [2021-04-15 02:31:04,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578100056] [2021-04-15 02:31:04,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:04,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:31:04,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:04,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:31:04,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:04,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:04,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-04-15 02:31:04,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105385224] [2021-04-15 02:31:04,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:31:04,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:04,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:31:04,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:31:04,991 INFO L87 Difference]: Start difference. First operand 161560 states and 485944 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:06,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:06,142 INFO L93 Difference]: Finished difference Result 206105 states and 618467 transitions. [2021-04-15 02:31:06,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:31:06,143 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:31:06,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:06,634 INFO L225 Difference]: With dead ends: 206105 [2021-04-15 02:31:06,634 INFO L226 Difference]: Without dead ends: 206105 [2021-04-15 02:31:06,634 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 373.6ms TimeCoverageRelationStatistics Valid=646, Invalid=1246, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 02:31:07,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206105 states. [2021-04-15 02:31:09,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206105 to 120052. [2021-04-15 02:31:09,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120052 states, 120051 states have (on average 3.011636721060216) internal successors, (361550), 120051 states have internal predecessors, (361550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:10,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120052 states to 120052 states and 361550 transitions. [2021-04-15 02:31:10,260 INFO L78 Accepts]: Start accepts. Automaton has 120052 states and 361550 transitions. Word has length 25 [2021-04-15 02:31:10,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:10,260 INFO L480 AbstractCegarLoop]: Abstraction has 120052 states and 361550 transitions. [2021-04-15 02:31:10,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:10,260 INFO L276 IsEmpty]: Start isEmpty. Operand 120052 states and 361550 transitions. [2021-04-15 02:31:10,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:31:10,317 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:10,317 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:10,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21889,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:10,518 INFO L428 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:10,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:10,518 INFO L82 PathProgramCache]: Analyzing trace with hash -2147351670, now seen corresponding path program 497 times [2021-04-15 02:31:10,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:10,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920162875] [2021-04-15 02:31:10,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:10,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:10,646 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:10,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920162875] [2021-04-15 02:31:10,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945344832] [2021-04-15 02:31:10,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:10,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:31:10,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:10,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:31:10,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:10,737 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:10,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:10,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-04-15 02:31:10,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270563084] [2021-04-15 02:31:10,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:31:10,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:10,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:31:10,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:31:10,738 INFO L87 Difference]: Start difference. First operand 120052 states and 361550 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:12,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:12,122 INFO L93 Difference]: Finished difference Result 156127 states and 468137 transitions. [2021-04-15 02:31:12,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:31:12,123 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:31:12,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:12,481 INFO L225 Difference]: With dead ends: 156127 [2021-04-15 02:31:12,481 INFO L226 Difference]: Without dead ends: 156127 [2021-04-15 02:31:12,482 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 341.4ms TimeCoverageRelationStatistics Valid=553, Invalid=1087, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 02:31:12,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156127 states. [2021-04-15 02:31:14,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156127 to 136853. [2021-04-15 02:31:15,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136853 states, 136852 states have (on average 3.0079209657147867) internal successors, (411640), 136852 states have internal predecessors, (411640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:15,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136853 states to 136853 states and 411640 transitions. [2021-04-15 02:31:15,449 INFO L78 Accepts]: Start accepts. Automaton has 136853 states and 411640 transitions. Word has length 25 [2021-04-15 02:31:15,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:15,449 INFO L480 AbstractCegarLoop]: Abstraction has 136853 states and 411640 transitions. [2021-04-15 02:31:15,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:15,449 INFO L276 IsEmpty]: Start isEmpty. Operand 136853 states and 411640 transitions. [2021-04-15 02:31:15,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:31:15,524 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:15,524 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:15,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21890,499 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:15,724 INFO L428 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:15,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:15,725 INFO L82 PathProgramCache]: Analyzing trace with hash 777604746, now seen corresponding path program 498 times [2021-04-15 02:31:15,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:15,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127509402] [2021-04-15 02:31:15,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:15,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127509402] [2021-04-15 02:31:15,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385668168] [2021-04-15 02:31:15,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:15,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:31:15,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:15,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:31:15,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:15,901 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:15,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:15,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:31:15,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396976837] [2021-04-15 02:31:15,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:31:15,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:15,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:31:15,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:31:15,902 INFO L87 Difference]: Start difference. First operand 136853 states and 411640 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:17,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:17,149 INFO L93 Difference]: Finished difference Result 148224 states and 444406 transitions. [2021-04-15 02:31:17,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:31:17,150 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:31:17,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:17,465 INFO L225 Difference]: With dead ends: 148224 [2021-04-15 02:31:17,465 INFO L226 Difference]: Without dead ends: 148224 [2021-04-15 02:31:17,466 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 209.0ms TimeCoverageRelationStatistics Valid=334, Invalid=596, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:31:17,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148224 states. [2021-04-15 02:31:19,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148224 to 137131. [2021-04-15 02:31:20,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137131 states, 137130 states have (on average 3.0072631809232115) internal successors, (412386), 137130 states have internal predecessors, (412386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:20,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137131 states to 137131 states and 412386 transitions. [2021-04-15 02:31:20,416 INFO L78 Accepts]: Start accepts. Automaton has 137131 states and 412386 transitions. Word has length 25 [2021-04-15 02:31:20,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:20,416 INFO L480 AbstractCegarLoop]: Abstraction has 137131 states and 412386 transitions. [2021-04-15 02:31:20,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:20,416 INFO L276 IsEmpty]: Start isEmpty. Operand 137131 states and 412386 transitions. [2021-04-15 02:31:20,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:31:20,489 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:20,489 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:20,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21891 [2021-04-15 02:31:20,689 INFO L428 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:20,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:20,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1315460324, now seen corresponding path program 499 times [2021-04-15 02:31:20,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:20,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256550572] [2021-04-15 02:31:20,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:20,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:20,785 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:20,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256550572] [2021-04-15 02:31:20,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538059217] [2021-04-15 02:31:20,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:20,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:31:20,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:20,878 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:20,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:20,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-04-15 02:31:20,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772585100] [2021-04-15 02:31:20,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:20,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:20,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:20,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:20,878 INFO L87 Difference]: Start difference. First operand 137131 states and 412386 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:22,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:22,211 INFO L93 Difference]: Finished difference Result 148544 states and 445335 transitions. [2021-04-15 02:31:22,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:31:22,212 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:31:22,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:22,533 INFO L225 Difference]: With dead ends: 148544 [2021-04-15 02:31:22,533 INFO L226 Difference]: Without dead ends: 148544 [2021-04-15 02:31:22,534 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 239.9ms TimeCoverageRelationStatistics Valid=377, Invalid=679, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:31:22,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148544 states. [2021-04-15 02:31:25,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148544 to 113272. [2021-04-15 02:31:25,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113272 states, 113271 states have (on average 3.0100908440818923) internal successors, (340956), 113271 states have internal predecessors, (340956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:25,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113272 states to 113272 states and 340956 transitions. [2021-04-15 02:31:25,373 INFO L78 Accepts]: Start accepts. Automaton has 113272 states and 340956 transitions. Word has length 25 [2021-04-15 02:31:25,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:25,373 INFO L480 AbstractCegarLoop]: Abstraction has 113272 states and 340956 transitions. [2021-04-15 02:31:25,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:25,373 INFO L276 IsEmpty]: Start isEmpty. Operand 113272 states and 340956 transitions. [2021-04-15 02:31:25,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:31:25,417 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:25,417 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:25,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 501 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21892 [2021-04-15 02:31:25,618 INFO L428 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:25,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:25,618 INFO L82 PathProgramCache]: Analyzing trace with hash 809114058, now seen corresponding path program 500 times [2021-04-15 02:31:25,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:25,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217703913] [2021-04-15 02:31:25,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:25,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:25,724 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:25,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217703913] [2021-04-15 02:31:25,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588706810] [2021-04-15 02:31:25,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:25,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:31:25,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:25,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:31:25,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:25,811 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:25,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:25,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-04-15 02:31:25,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744022914] [2021-04-15 02:31:25,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:25,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:25,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:25,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:25,812 INFO L87 Difference]: Start difference. First operand 113272 states and 340956 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:26,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:26,477 INFO L93 Difference]: Finished difference Result 128811 states and 386347 transitions. [2021-04-15 02:31:26,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:31:26,478 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:31:26,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:27,279 INFO L225 Difference]: With dead ends: 128811 [2021-04-15 02:31:27,279 INFO L226 Difference]: Without dead ends: 128811 [2021-04-15 02:31:27,279 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 233.1ms TimeCoverageRelationStatistics Valid=345, Invalid=647, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:31:27,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128811 states. [2021-04-15 02:31:29,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128811 to 123542. [2021-04-15 02:31:29,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123542 states, 123541 states have (on average 3.010603767170413) internal successors, (371933), 123541 states have internal predecessors, (371933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:29,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123542 states to 123542 states and 371933 transitions. [2021-04-15 02:31:29,874 INFO L78 Accepts]: Start accepts. Automaton has 123542 states and 371933 transitions. Word has length 25 [2021-04-15 02:31:29,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:29,874 INFO L480 AbstractCegarLoop]: Abstraction has 123542 states and 371933 transitions. [2021-04-15 02:31:29,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:29,874 INFO L276 IsEmpty]: Start isEmpty. Operand 123542 states and 371933 transitions. [2021-04-15 02:31:29,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:31:29,922 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:29,922 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:30,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21893 [2021-04-15 02:31:30,123 INFO L428 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:30,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:30,123 INFO L82 PathProgramCache]: Analyzing trace with hash -2002718300, now seen corresponding path program 501 times [2021-04-15 02:31:30,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:30,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812789679] [2021-04-15 02:31:30,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:30,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812789679] [2021-04-15 02:31:30,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805103759] [2021-04-15 02:31:30,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:30,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:31:30,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:30,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:31:30,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:30,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:30,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-04-15 02:31:30,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936181952] [2021-04-15 02:31:30,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:31:30,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:30,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:31:30,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:31:30,331 INFO L87 Difference]: Start difference. First operand 123542 states and 371933 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:30,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:30,970 INFO L93 Difference]: Finished difference Result 127635 states and 382989 transitions. [2021-04-15 02:31:30,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:31:30,971 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:31:30,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:31,254 INFO L225 Difference]: With dead ends: 127635 [2021-04-15 02:31:31,254 INFO L226 Difference]: Without dead ends: 127635 [2021-04-15 02:31:31,254 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 227.1ms TimeCoverageRelationStatistics Valid=290, Invalid=580, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:31:31,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127635 states. [2021-04-15 02:31:33,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127635 to 109142. [2021-04-15 02:31:33,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109142 states, 109141 states have (on average 3.011242337893184) internal successors, (328650), 109141 states have internal predecessors, (328650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:33,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109142 states to 109142 states and 328650 transitions. [2021-04-15 02:31:33,859 INFO L78 Accepts]: Start accepts. Automaton has 109142 states and 328650 transitions. Word has length 25 [2021-04-15 02:31:33,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:33,859 INFO L480 AbstractCegarLoop]: Abstraction has 109142 states and 328650 transitions. [2021-04-15 02:31:33,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:33,859 INFO L276 IsEmpty]: Start isEmpty. Operand 109142 states and 328650 transitions. [2021-04-15 02:31:33,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:31:33,901 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:33,901 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:34,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 503 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21894 [2021-04-15 02:31:34,101 INFO L428 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:34,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:34,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1024791818, now seen corresponding path program 502 times [2021-04-15 02:31:34,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:34,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967730917] [2021-04-15 02:31:34,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:34,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:34,220 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:34,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967730917] [2021-04-15 02:31:34,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385680887] [2021-04-15 02:31:34,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:34,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:31:34,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:34,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:31:34,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:34,309 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:34,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:34,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-04-15 02:31:34,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712106184] [2021-04-15 02:31:34,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:31:34,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:34,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:31:34,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:31:34,310 INFO L87 Difference]: Start difference. First operand 109142 states and 328650 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:34,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:34,911 INFO L93 Difference]: Finished difference Result 120403 states and 361213 transitions. [2021-04-15 02:31:34,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:31:34,913 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:31:34,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:35,710 INFO L225 Difference]: With dead ends: 120403 [2021-04-15 02:31:35,710 INFO L226 Difference]: Without dead ends: 120403 [2021-04-15 02:31:35,710 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 212.3ms TimeCoverageRelationStatistics Valid=246, Invalid=566, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:31:35,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120403 states. [2021-04-15 02:31:37,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120403 to 116997. [2021-04-15 02:31:37,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116997 states, 116996 states have (on average 3.009564429553147) internal successors, (352107), 116996 states have internal predecessors, (352107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:37,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116997 states to 116997 states and 352107 transitions. [2021-04-15 02:31:37,899 INFO L78 Accepts]: Start accepts. Automaton has 116997 states and 352107 transitions. Word has length 25 [2021-04-15 02:31:37,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:37,900 INFO L480 AbstractCegarLoop]: Abstraction has 116997 states and 352107 transitions. [2021-04-15 02:31:37,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:37,900 INFO L276 IsEmpty]: Start isEmpty. Operand 116997 states and 352107 transitions. [2021-04-15 02:31:37,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:31:37,940 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:37,940 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:38,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21895,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:38,141 INFO L428 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:38,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:38,141 INFO L82 PathProgramCache]: Analyzing trace with hash 388324964, now seen corresponding path program 503 times [2021-04-15 02:31:38,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:38,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763139805] [2021-04-15 02:31:38,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:38,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:38,686 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:38,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763139805] [2021-04-15 02:31:38,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442625900] [2021-04-15 02:31:38,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:38,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:31:38,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:38,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:31:38,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:38,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:38,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-04-15 02:31:38,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331858785] [2021-04-15 02:31:38,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:31:38,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:38,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:31:38,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:31:38,839 INFO L87 Difference]: Start difference. First operand 116997 states and 352107 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:39,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:39,531 INFO L93 Difference]: Finished difference Result 121023 states and 362901 transitions. [2021-04-15 02:31:39,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:31:39,532 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:31:39,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:39,802 INFO L225 Difference]: With dead ends: 121023 [2021-04-15 02:31:39,803 INFO L226 Difference]: Without dead ends: 121023 [2021-04-15 02:31:39,803 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 727.5ms TimeCoverageRelationStatistics Valid=454, Invalid=952, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 02:31:39,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121023 states. [2021-04-15 02:31:41,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121023 to 111390. [2021-04-15 02:31:42,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111390 states, 111389 states have (on average 3.0099920099830326) internal successors, (335280), 111389 states have internal predecessors, (335280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:42,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111390 states to 111390 states and 335280 transitions. [2021-04-15 02:31:42,344 INFO L78 Accepts]: Start accepts. Automaton has 111390 states and 335280 transitions. Word has length 25 [2021-04-15 02:31:42,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:42,344 INFO L480 AbstractCegarLoop]: Abstraction has 111390 states and 335280 transitions. [2021-04-15 02:31:42,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:42,345 INFO L276 IsEmpty]: Start isEmpty. Operand 111390 states and 335280 transitions. [2021-04-15 02:31:42,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:31:42,389 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:42,389 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:42,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21896 [2021-04-15 02:31:42,590 INFO L428 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:42,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:42,590 INFO L82 PathProgramCache]: Analyzing trace with hash 2132688970, now seen corresponding path program 504 times [2021-04-15 02:31:42,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:42,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927586169] [2021-04-15 02:31:42,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:42,729 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:42,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927586169] [2021-04-15 02:31:42,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890056356] [2021-04-15 02:31:42,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:42,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:31:42,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:42,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:31:42,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:42,818 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:42,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:42,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-04-15 02:31:42,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097060949] [2021-04-15 02:31:42,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:31:42,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:42,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:31:42,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:31:42,819 INFO L87 Difference]: Start difference. First operand 111390 states and 335280 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:43,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:43,735 INFO L93 Difference]: Finished difference Result 118654 states and 355586 transitions. [2021-04-15 02:31:43,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 02:31:43,736 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:31:43,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:44,489 INFO L225 Difference]: With dead ends: 118654 [2021-04-15 02:31:44,490 INFO L226 Difference]: Without dead ends: 118654 [2021-04-15 02:31:44,490 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 455.9ms TimeCoverageRelationStatistics Valid=790, Invalid=1562, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 02:31:44,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118654 states. [2021-04-15 02:31:46,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118654 to 110489. [2021-04-15 02:31:46,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110489 states, 110488 states have (on average 3.013286510752299) internal successors, (332932), 110488 states have internal predecessors, (332932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:46,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110489 states to 110489 states and 332932 transitions. [2021-04-15 02:31:46,520 INFO L78 Accepts]: Start accepts. Automaton has 110489 states and 332932 transitions. Word has length 25 [2021-04-15 02:31:46,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:46,521 INFO L480 AbstractCegarLoop]: Abstraction has 110489 states and 332932 transitions. [2021-04-15 02:31:46,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:46,521 INFO L276 IsEmpty]: Start isEmpty. Operand 110489 states and 332932 transitions. [2021-04-15 02:31:46,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:31:46,562 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:46,563 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:46,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21897 [2021-04-15 02:31:46,763 INFO L428 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:46,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:46,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1709190436, now seen corresponding path program 505 times [2021-04-15 02:31:46,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:46,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945798358] [2021-04-15 02:31:46,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 13 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:46,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945798358] [2021-04-15 02:31:46,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070409858] [2021-04-15 02:31:46,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:46,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:31:46,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:46,942 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:46,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:46,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-04-15 02:31:46,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237402605] [2021-04-15 02:31:46,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:46,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:46,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:46,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:46,943 INFO L87 Difference]: Start difference. First operand 110489 states and 332932 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:48,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:48,018 INFO L93 Difference]: Finished difference Result 110970 states and 333571 transitions. [2021-04-15 02:31:48,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:31:48,019 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:31:48,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:48,267 INFO L225 Difference]: With dead ends: 110970 [2021-04-15 02:31:48,267 INFO L226 Difference]: Without dead ends: 110962 [2021-04-15 02:31:48,267 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 637.3ms TimeCoverageRelationStatistics Valid=354, Invalid=702, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:31:48,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110962 states. [2021-04-15 02:31:50,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110962 to 110246. [2021-04-15 02:31:50,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110246 states, 110245 states have (on average 3.012263594720849) internal successors, (332087), 110245 states have internal predecessors, (332087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:50,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110246 states to 110246 states and 332087 transitions. [2021-04-15 02:31:50,855 INFO L78 Accepts]: Start accepts. Automaton has 110246 states and 332087 transitions. Word has length 25 [2021-04-15 02:31:50,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:50,856 INFO L480 AbstractCegarLoop]: Abstraction has 110246 states and 332087 transitions. [2021-04-15 02:31:50,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:50,856 INFO L276 IsEmpty]: Start isEmpty. Operand 110246 states and 332087 transitions. [2021-04-15 02:31:50,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:31:50,900 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:50,900 INFO L551 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:51,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21898 [2021-04-15 02:31:51,100 INFO L428 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:51,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:51,101 INFO L82 PathProgramCache]: Analyzing trace with hash -840408732, now seen corresponding path program 506 times [2021-04-15 02:31:51,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:51,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628801619] [2021-04-15 02:31:51,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:51,242 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:51,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628801619] [2021-04-15 02:31:51,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571670681] [2021-04-15 02:31:51,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:51,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:31:51,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:51,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 02:31:51,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:51,348 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:51,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:51,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-04-15 02:31:51,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239158065] [2021-04-15 02:31:51,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 02:31:51,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:51,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 02:31:51,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:31:51,349 INFO L87 Difference]: Start difference. First operand 110246 states and 332087 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:52,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:52,108 INFO L93 Difference]: Finished difference Result 112954 states and 339359 transitions. [2021-04-15 02:31:52,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:31:52,109 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:31:52,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:52,338 INFO L225 Difference]: With dead ends: 112954 [2021-04-15 02:31:52,338 INFO L226 Difference]: Without dead ends: 112954 [2021-04-15 02:31:52,338 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 357.3ms TimeCoverageRelationStatistics Valid=559, Invalid=1081, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 02:31:52,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112954 states. [2021-04-15 02:31:54,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112954 to 100239. [2021-04-15 02:31:54,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100239 states, 100238 states have (on average 3.0128693708972647) internal successors, (302004), 100238 states have internal predecessors, (302004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-04-15 02:31:54,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21899,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:54,884 WARN L545 AbstractCegarLoop]: Verification canceled [2021-04-15 02:31:54,888 WARN L224 ceAbstractionStarter]: Timeout [2021-04-15 02:31:54,888 INFO L202 PluginConnector]: Adding new model unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 02:31:54 BasicIcfg [2021-04-15 02:31:54,888 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 02:31:54,888 INFO L168 Benchmark]: Toolchain (without parser) took 797021.24 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 236.4 MB in the beginning and 9.0 GB in the end (delta: -8.8 GB). Peak memory consumption was 7.4 GB. Max. memory is 16.0 GB. [2021-04-15 02:31:54,889 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.25 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 02:31:54,889 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.45 ms. Allocated memory is still 255.9 MB. Free memory was 236.4 MB in the beginning and 235.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 02:31:54,889 INFO L168 Benchmark]: Boogie Preprocessor took 15.26 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.0 MB in the end (delta: 989.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 02:31:54,889 INFO L168 Benchmark]: RCFGBuilder took 379.52 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 236.2 MB in the end (delta: -2.2 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.0 GB. [2021-04-15 02:31:54,889 INFO L168 Benchmark]: TraceAbstraction took 796585.46 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 236.2 MB in the beginning and 9.0 GB in the end (delta: -8.8 GB). Peak memory consumption was 7.3 GB. Max. memory is 16.0 GB. [2021-04-15 02:31:54,889 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.25 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 35.45 ms. Allocated memory is still 255.9 MB. Free memory was 236.4 MB in the beginning and 235.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.26 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.0 MB in the end (delta: 989.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 379.52 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 236.2 MB in the end (delta: -2.2 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 796585.46 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 236.2 MB in the beginning and 9.0 GB in the end (delta: -8.8 GB). Peak memory consumption was 7.3 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 53). Cancelled while ReachableStatesComputation was computing reachable states (72370 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 796476.9ms, OverallIterations: 510, TraceHistogramMax: 11, EmptinessCheckTime: 11331.6ms, AutomataDifference: 202692.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 20.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10401 SDtfs, 44753 SDslu, 66778 SDs, 0 SdLazy, 78375 SolverSat, 14784 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 35558.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22283 GetRequests, 10512 SyntacticMatches, 255 SemanticMatches, 11516 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76664 ImplicationChecksByTransitivity, 93435.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=269074occurred in iteration=456, InterpolantAutomatonStates: 10148, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 285310.1ms AutomataMinimizationTime, 510 MinimizatonAttempts, 1953028 StatesRemovedByMinimization, 505 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1602.0ms SsaConstructionTime, 6276.2ms SatisfiabilityAnalysisTime, 178052.9ms InterpolantComputationTime, 21569 NumberOfCodeBlocks, 21563 NumberOfCodeBlocksAsserted, 2254 NumberOfCheckSat, 20552 ConstructedInterpolants, 0 QuantifiedInterpolants, 93548 SizeOfPredicates, 276 NumberOfNonLiveVariables, 44187 ConjunctsInSsa, 7703 ConjunctsInUnsatCore, 1017 InterpolantComputations, 3 PerfectInterpolantSequences, 20069/51234 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown