/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-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 14:03:19,665 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 14:03:19,667 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 14:03:19,709 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 14:03:19,781 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 [2021-05-03 14:03:19,808 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 14:03:19,808 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 14:03:19,809 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 14:03:19,809 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 14:03:19,810 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 14:03:19,810 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 14:03:19,810 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 14:03:19,810 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 14:03:19,810 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 14:03:19,811 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 14:03:19,811 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 14:03:19,811 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 14:03:19,811 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 14:03:19,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 14:03:19,825 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 14:03:19,825 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 14:03:19,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 14:03:19,825 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 14:03:19,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 14:03:19,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 14:03:19,825 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 14:03:19,826 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 14:03:19,826 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 14:03:19,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 14:03:19,826 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 14:03:19,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 14:03:19,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 14:03:19,826 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 14:03:19,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 14:03:19,826 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 14:03:19,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 14:03:19,827 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 14:03:20,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 14:03:20,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 14:03:20,418 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 14:03:20,419 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 14:03:20,421 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 14:03:20,422 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-3.wvr.bpl [2021-05-03 14:03:20,423 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-3.wvr.bpl' [2021-05-03 14:03:20,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 14:03:20,527 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 14:03:20,530 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 14:03:20,530 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 14:03:20,530 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 14:03:20,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:03:20" (1/1) ... [2021-05-03 14:03:20,555 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:03:20" (1/1) ... [2021-05-03 14:03:20,561 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 14:03:20,564 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 14:03:20,568 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 14:03:20,568 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 14:03:20,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:03:20" (1/1) ... [2021-05-03 14:03:20,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:03:20" (1/1) ... [2021-05-03 14:03:20,577 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:03:20" (1/1) ... [2021-05-03 14:03:20,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:03:20" (1/1) ... [2021-05-03 14:03:20,580 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:03:20" (1/1) ... [2021-05-03 14:03:20,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:03:20" (1/1) ... [2021-05-03 14:03:20,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:03:20" (1/1) ... [2021-05-03 14:03:20,598 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 14:03:20,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 14:03:20,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 14:03:20,613 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 14:03:20,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:03:20" (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 [2021-05-03 14:03:20,740 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 14:03:20,741 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 14:03:20,752 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 14:03:20,753 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 14:03:20,753 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 14:03:20,753 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 14:03:20,753 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 14:03:20,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 14:03:20,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 14:03:20,754 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 14:03:21,150 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 14:03:21,151 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-03 14:03:21,151 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-05-03 14:03:21,151 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-05-03 14:03:21,152 INFO L202 PluginConnector]: Adding new model unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 02:03:21 BoogieIcfgContainer [2021-05-03 14:03:21,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 14:03:21,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 14:03:21,158 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 14:03:21,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 14:03:21,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:03:20" (1/2) ... [2021-05-03 14:03:21,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dad033e and model type unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 02:03:21, skipping insertion in model container [2021-05-03 14:03:21,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 02:03:21" (2/2) ... [2021-05-03 14:03:21,162 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.bpl [2021-05-03 14:03:21,166 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 14:03:21,166 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 14:03:21,169 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 14:03:21,170 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 14:03:21,210 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-05-03 14:03:21,245 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-03 14:03:21,269 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 14:03:21,269 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 14:03:21,269 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 14:03:21,270 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 14:03:21,272 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 14:03:21,272 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 14:03:21,272 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 14:03:21,272 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 14:03:21,298 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-05-03 14:03:21,305 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) [2021-05-03 14:03:21,307 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) [2021-05-03 14:03:21,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-05-03 14:03:21,311 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:21,311 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:21,321 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:21,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:21,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1034851945, now seen corresponding path program 1 times [2021-05-03 14:03:21,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:21,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842357895] [2021-05-03 14:03:21,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:21,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:21,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:21,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842357895] [2021-05-03 14:03:21,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:03:21,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-03 14:03:21,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414762316] [2021-05-03 14:03:21,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 14:03:21,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:21,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 14:03:21,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 14:03:21,552 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) [2021-05-03 14:03:21,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:21,592 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-05-03 14:03:21,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 14:03:21,593 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 [2021-05-03 14:03:21,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:21,600 INFO L225 Difference]: With dead ends: 22 [2021-05-03 14:03:21,600 INFO L226 Difference]: Without dead ends: 19 [2021-05-03 14:03:21,601 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 14:03:21,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-03 14:03:21,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-03 14:03:21,624 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) [2021-05-03 14:03:21,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-05-03 14:03:21,626 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-05-03 14:03:21,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:21,626 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-05-03 14:03:21,626 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) [2021-05-03 14:03:21,627 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-05-03 14:03:21,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-03 14:03:21,627 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:21,627 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:21,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 14:03:21,628 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:21,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:21,631 INFO L82 PathProgramCache]: Analyzing trace with hash -619637623, now seen corresponding path program 1 times [2021-05-03 14:03:21,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:21,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101226145] [2021-05-03 14:03:21,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:21,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101226145] [2021-05-03 14:03:21,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765657535] [2021-05-03 14:03:21,725 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 [2021-05-03 14:03:21,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:21,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-03 14:03:21,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:21,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:21,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-05-03 14:03:21,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883022905] [2021-05-03 14:03:21,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:03:21,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:21,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:03:21,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:03:21,877 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) [2021-05-03 14:03:21,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:21,913 INFO L93 Difference]: Finished difference Result 28 states and 45 transitions. [2021-05-03 14:03:21,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:03:21,914 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 [2021-05-03 14:03:21,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:21,915 INFO L225 Difference]: With dead ends: 28 [2021-05-03 14:03:21,915 INFO L226 Difference]: Without dead ends: 28 [2021-05-03 14:03:21,916 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 14:03:21,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-03 14:03:21,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-05-03 14:03:21,922 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) [2021-05-03 14:03:21,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 35 transitions. [2021-05-03 14:03:21,923 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 35 transitions. Word has length 10 [2021-05-03 14:03:21,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:21,923 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 35 transitions. [2021-05-03 14:03:21,924 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) [2021-05-03 14:03:21,924 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 35 transitions. [2021-05-03 14:03:21,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-03 14:03:21,925 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:21,925 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:22,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-03 14:03:22,147 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:22,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:22,148 INFO L82 PathProgramCache]: Analyzing trace with hash 2038710898, now seen corresponding path program 1 times [2021-05-03 14:03:22,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:22,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917125225] [2021-05-03 14:03:22,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:22,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:22,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917125225] [2021-05-03 14:03:22,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:03:22,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 14:03:22,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067191069] [2021-05-03 14:03:22,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:03:22,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:22,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:03:22,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:03:22,171 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) [2021-05-03 14:03:22,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:22,191 INFO L93 Difference]: Finished difference Result 22 states and 36 transitions. [2021-05-03 14:03:22,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:03:22,191 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 [2021-05-03 14:03:22,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:22,192 INFO L225 Difference]: With dead ends: 22 [2021-05-03 14:03:22,192 INFO L226 Difference]: Without dead ends: 18 [2021-05-03 14:03:22,192 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:03:22,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-03 14:03:22,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-03 14:03:22,200 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) [2021-05-03 14:03:22,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-05-03 14:03:22,203 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-05-03 14:03:22,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:22,203 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-05-03 14:03:22,203 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) [2021-05-03 14:03:22,203 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-05-03 14:03:22,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-03 14:03:22,204 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:22,204 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:22,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 14:03:22,204 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:22,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:22,205 INFO L82 PathProgramCache]: Analyzing trace with hash 298365290, now seen corresponding path program 2 times [2021-05-03 14:03:22,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:22,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089551914] [2021-05-03 14:03:22,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:22,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:22,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:22,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089551914] [2021-05-03 14:03:22,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:03:22,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 14:03:22,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272474870] [2021-05-03 14:03:22,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:03:22,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:22,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:03:22,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:03:22,241 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) [2021-05-03 14:03:22,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:22,259 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-05-03 14:03:22,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:03:22,259 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 [2021-05-03 14:03:22,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:22,260 INFO L225 Difference]: With dead ends: 20 [2021-05-03 14:03:22,261 INFO L226 Difference]: Without dead ends: 20 [2021-05-03 14:03:22,261 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:03:22,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-03 14:03:22,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-03 14:03:22,266 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) [2021-05-03 14:03:22,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-05-03 14:03:22,267 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-05-03 14:03:22,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:22,267 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-05-03 14:03:22,267 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) [2021-05-03 14:03:22,267 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-05-03 14:03:22,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-03 14:03:22,267 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:22,268 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:22,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 14:03:22,268 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:22,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:22,268 INFO L82 PathProgramCache]: Analyzing trace with hash -2005825454, now seen corresponding path program 1 times [2021-05-03 14:03:22,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:22,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985012128] [2021-05-03 14:03:22,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:22,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:22,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:22,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985012128] [2021-05-03 14:03:22,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111396937] [2021-05-03 14:03:22,337 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 [2021-05-03 14:03:22,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:22,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 14:03:22,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:22,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:22,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-05-03 14:03:22,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233859211] [2021-05-03 14:03:22,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:03:22,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:22,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:03:22,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:03:22,472 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) [2021-05-03 14:03:22,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:22,500 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-05-03 14:03:22,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:03:22,501 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 [2021-05-03 14:03:22,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:22,502 INFO L225 Difference]: With dead ends: 24 [2021-05-03 14:03:22,502 INFO L226 Difference]: Without dead ends: 24 [2021-05-03 14:03:22,502 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:03:22,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-03 14:03:22,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-03 14:03:22,504 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) [2021-05-03 14:03:22,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-05-03 14:03:22,505 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-05-03 14:03:22,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:22,505 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-05-03 14:03:22,505 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) [2021-05-03 14:03:22,505 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-05-03 14:03:22,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 14:03:22,505 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:22,505 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:22,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:22,717 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:22,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:22,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1462566514, now seen corresponding path program 2 times [2021-05-03 14:03:22,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:22,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944566505] [2021-05-03 14:03:22,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:22,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:22,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944566505] [2021-05-03 14:03:22,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435708361] [2021-05-03 14:03:22,754 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 [2021-05-03 14:03:22,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:03:22,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:22,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 14:03:22,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:22,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:22,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:22,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-05-03 14:03:22,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063337729] [2021-05-03 14:03:22,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:03:22,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:22,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:03:22,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:03:22,865 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:22,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:22,907 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-05-03 14:03:22,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:03:22,913 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 [2021-05-03 14:03:22,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:22,914 INFO L225 Difference]: With dead ends: 28 [2021-05-03 14:03:22,914 INFO L226 Difference]: Without dead ends: 28 [2021-05-03 14:03:22,914 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:03:22,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-03 14:03:22,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-03 14:03:22,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:22,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 51 transitions. [2021-05-03 14:03:22,933 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 51 transitions. Word has length 12 [2021-05-03 14:03:22,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:22,933 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 51 transitions. [2021-05-03 14:03:22,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:22,933 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 51 transitions. [2021-05-03 14:03:22,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 14:03:22,934 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:22,934 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:23,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:23,151 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:23,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:23,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1608535122, now seen corresponding path program 3 times [2021-05-03 14:03:23,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:23,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963747932] [2021-05-03 14:03:23,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:23,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:23,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963747932] [2021-05-03 14:03:23,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199032423] [2021-05-03 14:03:23,201 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 [2021-05-03 14:03:23,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:03:23,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:23,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:03:23,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:23,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:03:23,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-05-03 14:03:23,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:03:23,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:03:23,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:03:23,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-05-03 14:03:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:23,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:23,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-05-03 14:03:23,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650681247] [2021-05-03 14:03:23,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:03:23,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:23,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:03:23,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:03:23,370 INFO L87 Difference]: Start difference. First operand 28 states and 51 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-05-03 14:03:23,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:23,409 INFO L93 Difference]: Finished difference Result 67 states and 119 transitions. [2021-05-03 14:03:23,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:03:23,411 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 13 [2021-05-03 14:03:23,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:23,413 INFO L225 Difference]: With dead ends: 67 [2021-05-03 14:03:23,413 INFO L226 Difference]: Without dead ends: 64 [2021-05-03 14:03:23,414 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:03:23,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-03 14:03:23,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 39. [2021-05-03 14:03:23,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:23,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 82 transitions. [2021-05-03 14:03:23,426 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 82 transitions. Word has length 13 [2021-05-03 14:03:23,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:23,426 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 82 transitions. [2021-05-03 14:03:23,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-05-03 14:03:23,427 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 82 transitions. [2021-05-03 14:03:23,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 14:03:23,427 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:23,428 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:23,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:23,641 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:23,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:23,641 INFO L82 PathProgramCache]: Analyzing trace with hash -942907630, now seen corresponding path program 4 times [2021-05-03 14:03:23,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:23,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271937250] [2021-05-03 14:03:23,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:23,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:23,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:23,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271937250] [2021-05-03 14:03:23,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736502050] [2021-05-03 14:03:23,677 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 [2021-05-03 14:03:23,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:03:23,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:23,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:03:23,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:23,780 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:03:23,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-05-03 14:03:23,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:03:23,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:03:23,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:03:23,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-05-03 14:03:23,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:23,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:23,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-05-03 14:03:23,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118071153] [2021-05-03 14:03:23,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:03:23,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:23,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:03:23,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:03:23,834 INFO L87 Difference]: Start difference. First operand 39 states and 82 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) [2021-05-03 14:03:23,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:23,882 INFO L93 Difference]: Finished difference Result 75 states and 144 transitions. [2021-05-03 14:03:23,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:03:23,882 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 13 [2021-05-03 14:03:23,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:23,883 INFO L225 Difference]: With dead ends: 75 [2021-05-03 14:03:23,883 INFO L226 Difference]: Without dead ends: 72 [2021-05-03 14:03:23,883 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:03:23,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-03 14:03:23,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 45. [2021-05-03 14:03:23,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.340909090909091) internal successors, (103), 44 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:23,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 103 transitions. [2021-05-03 14:03:23,887 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 103 transitions. Word has length 13 [2021-05-03 14:03:23,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:23,888 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 103 transitions. [2021-05-03 14:03:23,888 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) [2021-05-03 14:03:23,888 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 103 transitions. [2021-05-03 14:03:23,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 14:03:23,889 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:23,889 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:24,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-03 14:03:24,105 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:24,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:24,105 INFO L82 PathProgramCache]: Analyzing trace with hash -317115318, now seen corresponding path program 5 times [2021-05-03 14:03:24,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:24,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074320245] [2021-05-03 14:03:24,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:24,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074320245] [2021-05-03 14:03:24,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630807158] [2021-05-03 14:03:24,142 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) [2021-05-03 14:03:24,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:03:24,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:24,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:03:24,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:24,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:03:24,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-05-03 14:03:24,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:03:24,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:03:24,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:03:24,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-05-03 14:03:24,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:24,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:24,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-05-03 14:03:24,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265966095] [2021-05-03 14:03:24,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:03:24,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:24,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:03:24,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:03:24,340 INFO L87 Difference]: Start difference. First operand 45 states and 103 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) [2021-05-03 14:03:24,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:24,400 INFO L93 Difference]: Finished difference Result 83 states and 169 transitions. [2021-05-03 14:03:24,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:03:24,401 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 13 [2021-05-03 14:03:24,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:24,402 INFO L225 Difference]: With dead ends: 83 [2021-05-03 14:03:24,402 INFO L226 Difference]: Without dead ends: 80 [2021-05-03 14:03:24,402 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:03:24,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-03 14:03:24,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2021-05-03 14:03:24,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 51 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:24,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2021-05-03 14:03:24,420 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 13 [2021-05-03 14:03:24,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:24,420 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2021-05-03 14:03:24,420 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) [2021-05-03 14:03:24,420 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2021-05-03 14:03:24,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 14:03:24,421 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:24,421 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:24,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:24,631 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:24,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:24,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1902577170, now seen corresponding path program 6 times [2021-05-03 14:03:24,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:24,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212366262] [2021-05-03 14:03:24,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:24,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:24,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:24,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212366262] [2021-05-03 14:03:24,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076852692] [2021-05-03 14:03:24,670 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 [2021-05-03 14:03:24,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:03:24,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:24,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:03:24,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:24,801 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:03:24,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-05-03 14:03:24,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:03:24,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:03:24,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:03:24,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-05-03 14:03:24,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:24,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:24,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-05-03 14:03:24,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001415713] [2021-05-03 14:03:24,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:03:24,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:24,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:03:24,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:03:24,832 INFO L87 Difference]: Start difference. First operand 52 states and 127 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) [2021-05-03 14:03:24,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:24,902 INFO L93 Difference]: Finished difference Result 92 states and 197 transitions. [2021-05-03 14:03:24,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:03:24,902 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 13 [2021-05-03 14:03:24,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:24,903 INFO L225 Difference]: With dead ends: 92 [2021-05-03 14:03:24,903 INFO L226 Difference]: Without dead ends: 89 [2021-05-03 14:03:24,903 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:03:24,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-03 14:03:24,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 61. [2021-05-03 14:03:24,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5833333333333335) internal successors, (155), 60 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:24,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 155 transitions. [2021-05-03 14:03:24,915 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 155 transitions. Word has length 13 [2021-05-03 14:03:24,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:24,915 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 155 transitions. [2021-05-03 14:03:24,915 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) [2021-05-03 14:03:24,915 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 155 transitions. [2021-05-03 14:03:24,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:03:24,916 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:24,916 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:25,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-03 14:03:25,129 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:25,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:25,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1838594674, now seen corresponding path program 7 times [2021-05-03 14:03:25,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:25,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869195304] [2021-05-03 14:03:25,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:25,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:25,166 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:25,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869195304] [2021-05-03 14:03:25,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81727040] [2021-05-03 14:03:25,166 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 [2021-05-03 14:03:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:25,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:03:25,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:25,237 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:25,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:25,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 14:03:25,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707278678] [2021-05-03 14:03:25,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:03:25,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:25,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:03:25,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:03:25,239 INFO L87 Difference]: Start difference. First operand 61 states and 155 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) [2021-05-03 14:03:25,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:25,328 INFO L93 Difference]: Finished difference Result 114 states and 226 transitions. [2021-05-03 14:03:25,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:03:25,328 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 [2021-05-03 14:03:25,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:25,329 INFO L225 Difference]: With dead ends: 114 [2021-05-03 14:03:25,329 INFO L226 Difference]: Without dead ends: 114 [2021-05-03 14:03:25,329 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:03:25,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-03 14:03:25,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 62. [2021-05-03 14:03:25,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.6065573770491803) internal successors, (159), 61 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:25,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 159 transitions. [2021-05-03 14:03:25,332 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 159 transitions. Word has length 14 [2021-05-03 14:03:25,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:25,332 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 159 transitions. [2021-05-03 14:03:25,332 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) [2021-05-03 14:03:25,332 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 159 transitions. [2021-05-03 14:03:25,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:03:25,333 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:25,333 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:25,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-03 14:03:25,545 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:25,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:25,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1651947095, now seen corresponding path program 8 times [2021-05-03 14:03:25,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:25,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748898982] [2021-05-03 14:03:25,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:25,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:25,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748898982] [2021-05-03 14:03:25,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079059172] [2021-05-03 14:03:25,581 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 [2021-05-03 14:03:25,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:03:25,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:25,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:03:25,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:25,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:25,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:25,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 14:03:25,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892284424] [2021-05-03 14:03:25,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:03:25,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:25,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:03:25,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:03:25,637 INFO L87 Difference]: Start difference. First operand 62 states and 159 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) [2021-05-03 14:03:25,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:25,722 INFO L93 Difference]: Finished difference Result 121 states and 252 transitions. [2021-05-03 14:03:25,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:03:25,722 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 [2021-05-03 14:03:25,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:25,723 INFO L225 Difference]: With dead ends: 121 [2021-05-03 14:03:25,723 INFO L226 Difference]: Without dead ends: 116 [2021-05-03 14:03:25,723 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:03:25,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-03 14:03:25,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 75. [2021-05-03 14:03:25,730 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) [2021-05-03 14:03:25,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 192 transitions. [2021-05-03 14:03:25,731 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 192 transitions. Word has length 14 [2021-05-03 14:03:25,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:25,731 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 192 transitions. [2021-05-03 14:03:25,731 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) [2021-05-03 14:03:25,731 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 192 transitions. [2021-05-03 14:03:25,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:03:25,732 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:25,732 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:25,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:25,932 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:25,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:25,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1032606612, now seen corresponding path program 9 times [2021-05-03 14:03:25,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:25,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31267100] [2021-05-03 14:03:25,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:25,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:25,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31267100] [2021-05-03 14:03:25,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685155851] [2021-05-03 14:03:25,968 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 [2021-05-03 14:03:25,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:03:25,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:25,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:25,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:26,042 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:26,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:26,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-05-03 14:03:26,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096999955] [2021-05-03 14:03:26,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:03:26,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:26,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:03:26,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:03:26,044 INFO L87 Difference]: Start difference. First operand 75 states and 192 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) [2021-05-03 14:03:26,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:26,293 INFO L93 Difference]: Finished difference Result 137 states and 314 transitions. [2021-05-03 14:03:26,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:03:26,293 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 14 [2021-05-03 14:03:26,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:26,294 INFO L225 Difference]: With dead ends: 137 [2021-05-03 14:03:26,294 INFO L226 Difference]: Without dead ends: 135 [2021-05-03 14:03:26,295 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 159.9ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:03:26,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-03 14:03:26,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 104. [2021-05-03 14:03:26,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.6116504854368934) internal successors, (269), 103 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:26,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 269 transitions. [2021-05-03 14:03:26,299 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 269 transitions. Word has length 14 [2021-05-03 14:03:26,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:26,299 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 269 transitions. [2021-05-03 14:03:26,299 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) [2021-05-03 14:03:26,299 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 269 transitions. [2021-05-03 14:03:26,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:03:26,300 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:26,300 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:26,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:26,505 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:26,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:26,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1949662965, now seen corresponding path program 10 times [2021-05-03 14:03:26,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:26,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928981684] [2021-05-03 14:03:26,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:26,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:26,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:26,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928981684] [2021-05-03 14:03:26,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982326550] [2021-05-03 14:03:26,628 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) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:26,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:03:26,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:26,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:03:26,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:26,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:26,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:26,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 14:03:26,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315454668] [2021-05-03 14:03:26,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:03:26,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:26,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:03:26,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:03:26,698 INFO L87 Difference]: Start difference. First operand 104 states and 269 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2021-05-03 14:03:26,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:26,744 INFO L93 Difference]: Finished difference Result 162 states and 349 transitions. [2021-05-03 14:03:26,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:03:26,744 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 [2021-05-03 14:03:26,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:26,746 INFO L225 Difference]: With dead ends: 162 [2021-05-03 14:03:26,746 INFO L226 Difference]: Without dead ends: 162 [2021-05-03 14:03:26,746 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:03:26,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-03 14:03:26,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 105. [2021-05-03 14:03:26,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.6153846153846154) internal successors, (272), 104 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:26,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 272 transitions. [2021-05-03 14:03:26,771 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 272 transitions. Word has length 14 [2021-05-03 14:03:26,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:26,772 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 272 transitions. [2021-05-03 14:03:26,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2021-05-03 14:03:26,772 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 272 transitions. [2021-05-03 14:03:26,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:03:26,776 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:26,776 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:26,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-03 14:03:26,990 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:26,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:26,990 INFO L82 PathProgramCache]: Analyzing trace with hash 857706217, now seen corresponding path program 11 times [2021-05-03 14:03:26,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:26,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501651005] [2021-05-03 14:03:26,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:26,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:27,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501651005] [2021-05-03 14:03:27,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768963914] [2021-05-03 14:03:27,026 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) [2021-05-03 14:03:27,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:03:27,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:27,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:03:27,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:27,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:27,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:27,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 14:03:27,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817972279] [2021-05-03 14:03:27,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:03:27,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:27,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:03:27,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:03:27,086 INFO L87 Difference]: Start difference. First operand 105 states and 272 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2021-05-03 14:03:27,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:27,165 INFO L93 Difference]: Finished difference Result 170 states and 369 transitions. [2021-05-03 14:03:27,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:03:27,165 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 [2021-05-03 14:03:27,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:27,166 INFO L225 Difference]: With dead ends: 170 [2021-05-03 14:03:27,166 INFO L226 Difference]: Without dead ends: 168 [2021-05-03 14:03:27,167 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:03:27,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-05-03 14:03:27,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 112. [2021-05-03 14:03:27,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.6576576576576576) internal successors, (295), 111 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:27,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 295 transitions. [2021-05-03 14:03:27,171 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 295 transitions. Word has length 14 [2021-05-03 14:03:27,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:27,171 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 295 transitions. [2021-05-03 14:03:27,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2021-05-03 14:03:27,171 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 295 transitions. [2021-05-03 14:03:27,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:03:27,172 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:27,172 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:27,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-03 14:03:27,373 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:27,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:27,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1719512019, now seen corresponding path program 12 times [2021-05-03 14:03:27,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:27,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466232237] [2021-05-03 14:03:27,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:27,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:27,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466232237] [2021-05-03 14:03:27,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687226631] [2021-05-03 14:03:27,405 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 [2021-05-03 14:03:27,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:03:27,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:27,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:03:27,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:27,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:27,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:27,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 14:03:27,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817419341] [2021-05-03 14:03:27,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:03:27,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:27,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:03:27,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:03:27,462 INFO L87 Difference]: Start difference. First operand 112 states and 295 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2021-05-03 14:03:27,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:27,496 INFO L93 Difference]: Finished difference Result 174 states and 379 transitions. [2021-05-03 14:03:27,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:03:27,498 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 [2021-05-03 14:03:27,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:27,499 INFO L225 Difference]: With dead ends: 174 [2021-05-03 14:03:27,499 INFO L226 Difference]: Without dead ends: 174 [2021-05-03 14:03:27,499 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:03:27,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-03 14:03:27,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 112. [2021-05-03 14:03:27,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.6576576576576576) internal successors, (295), 111 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:27,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 295 transitions. [2021-05-03 14:03:27,503 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 295 transitions. Word has length 14 [2021-05-03 14:03:27,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:27,503 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 295 transitions. [2021-05-03 14:03:27,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2021-05-03 14:03:27,503 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 295 transitions. [2021-05-03 14:03:27,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:03:27,503 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:27,503 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:27,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-03 14:03:27,704 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:27,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:27,704 INFO L82 PathProgramCache]: Analyzing trace with hash 846407943, now seen corresponding path program 13 times [2021-05-03 14:03:27,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:27,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625858498] [2021-05-03 14:03:27,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:27,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:27,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625858498] [2021-05-03 14:03:27,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284339035] [2021-05-03 14:03:27,741 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) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:27,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:27,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:03:27,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:27,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:27,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:27,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 14:03:27,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533756915] [2021-05-03 14:03:27,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:03:27,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:27,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:03:27,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:03:27,805 INFO L87 Difference]: Start difference. First operand 112 states and 295 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) [2021-05-03 14:03:27,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:27,869 INFO L93 Difference]: Finished difference Result 188 states and 405 transitions. [2021-05-03 14:03:27,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:03:27,870 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 [2021-05-03 14:03:27,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:27,872 INFO L225 Difference]: With dead ends: 188 [2021-05-03 14:03:27,873 INFO L226 Difference]: Without dead ends: 188 [2021-05-03 14:03:27,873 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:03:27,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-03 14:03:27,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 114. [2021-05-03 14:03:27,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.663716814159292) internal successors, (301), 113 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:27,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 301 transitions. [2021-05-03 14:03:27,879 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 301 transitions. Word has length 14 [2021-05-03 14:03:27,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:27,879 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 301 transitions. [2021-05-03 14:03:27,879 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) [2021-05-03 14:03:27,879 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 301 transitions. [2021-05-03 14:03:27,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:03:27,880 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:27,880 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:28,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:28,098 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:28,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:28,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1217568591, now seen corresponding path program 14 times [2021-05-03 14:03:28,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:28,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186815125] [2021-05-03 14:03:28,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:28,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186815125] [2021-05-03 14:03:28,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043277442] [2021-05-03 14:03:28,144 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) [2021-05-03 14:03:28,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:03:28,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:28,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:03:28,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:28,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:28,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:28,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 14:03:28,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422449213] [2021-05-03 14:03:28,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:03:28,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:28,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:03:28,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:03:28,198 INFO L87 Difference]: Start difference. First operand 114 states and 301 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2021-05-03 14:03:28,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:28,348 INFO L93 Difference]: Finished difference Result 182 states and 405 transitions. [2021-05-03 14:03:28,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:03:28,348 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 [2021-05-03 14:03:28,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:28,349 INFO L225 Difference]: With dead ends: 182 [2021-05-03 14:03:28,349 INFO L226 Difference]: Without dead ends: 180 [2021-05-03 14:03:28,349 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:03:28,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-03 14:03:28,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 124. [2021-05-03 14:03:28,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.707317073170732) internal successors, (333), 123 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:28,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 333 transitions. [2021-05-03 14:03:28,354 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 333 transitions. Word has length 14 [2021-05-03 14:03:28,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:28,355 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 333 transitions. [2021-05-03 14:03:28,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2021-05-03 14:03:28,355 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 333 transitions. [2021-05-03 14:03:28,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:03:28,355 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:28,356 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:28,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-03 14:03:28,569 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:28,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:28,569 INFO L82 PathProgramCache]: Analyzing trace with hash 500180469, now seen corresponding path program 15 times [2021-05-03 14:03:28,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:28,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426986162] [2021-05-03 14:03:28,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:28,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:28,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426986162] [2021-05-03 14:03:28,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121723947] [2021-05-03 14:03:28,616 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 [2021-05-03 14:03:28,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:03:28,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:28,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:03:28,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:28,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:28,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:28,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 14:03:28,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373332818] [2021-05-03 14:03:28,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:03:28,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:28,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:03:28,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:03:28,717 INFO L87 Difference]: Start difference. First operand 124 states and 333 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2021-05-03 14:03:28,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:28,769 INFO L93 Difference]: Finished difference Result 185 states and 412 transitions. [2021-05-03 14:03:28,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:03:28,770 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 [2021-05-03 14:03:28,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:28,772 INFO L225 Difference]: With dead ends: 185 [2021-05-03 14:03:28,773 INFO L226 Difference]: Without dead ends: 185 [2021-05-03 14:03:28,773 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:03:28,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-05-03 14:03:28,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 124. [2021-05-03 14:03:28,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.707317073170732) internal successors, (333), 123 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:28,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 333 transitions. [2021-05-03 14:03:28,777 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 333 transitions. Word has length 14 [2021-05-03 14:03:28,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:28,777 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 333 transitions. [2021-05-03 14:03:28,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2021-05-03 14:03:28,777 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 333 transitions. [2021-05-03 14:03:28,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:03:28,778 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:28,778 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:28,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:28,991 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:28,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:28,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1228866865, now seen corresponding path program 16 times [2021-05-03 14:03:28,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:28,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459699703] [2021-05-03 14:03:28,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:28,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:29,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:29,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459699703] [2021-05-03 14:03:29,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705475117] [2021-05-03 14:03:29,044 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 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 [2021-05-03 14:03:29,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:03:29,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:29,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:03:29,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:29,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:29,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 14:03:29,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765682713] [2021-05-03 14:03:29,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:03:29,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:29,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:03:29,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:03:29,203 INFO L87 Difference]: Start difference. First operand 124 states and 333 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) [2021-05-03 14:03:29,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:29,257 INFO L93 Difference]: Finished difference Result 194 states and 429 transitions. [2021-05-03 14:03:29,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:03:29,258 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 [2021-05-03 14:03:29,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:29,258 INFO L225 Difference]: With dead ends: 194 [2021-05-03 14:03:29,258 INFO L226 Difference]: Without dead ends: 194 [2021-05-03 14:03:29,259 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:03:29,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-03 14:03:29,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 124. [2021-05-03 14:03:29,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.707317073170732) internal successors, (333), 123 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:29,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 333 transitions. [2021-05-03 14:03:29,262 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 333 transitions. Word has length 14 [2021-05-03 14:03:29,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:29,262 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 333 transitions. [2021-05-03 14:03:29,262 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) [2021-05-03 14:03:29,262 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 333 transitions. [2021-05-03 14:03:29,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:03:29,264 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:29,264 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:29,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-03 14:03:29,482 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:29,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:29,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1005240629, now seen corresponding path program 17 times [2021-05-03 14:03:29,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:29,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122215209] [2021-05-03 14:03:29,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:29,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:29,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122215209] [2021-05-03 14:03:29,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986499625] [2021-05-03 14:03:29,539 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 [2021-05-03 14:03:29,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:03:29,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:29,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:03:29,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:29,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:29,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:29,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 14:03:29,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646397863] [2021-05-03 14:03:29,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:03:29,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:29,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:03:29,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:03:29,760 INFO L87 Difference]: Start difference. First operand 124 states and 333 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) [2021-05-03 14:03:29,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:29,839 INFO L93 Difference]: Finished difference Result 201 states and 462 transitions. [2021-05-03 14:03:29,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:03:29,840 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 [2021-05-03 14:03:29,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:29,845 INFO L225 Difference]: With dead ends: 201 [2021-05-03 14:03:29,845 INFO L226 Difference]: Without dead ends: 201 [2021-05-03 14:03:29,846 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:03:29,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-05-03 14:03:29,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 132. [2021-05-03 14:03:29,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.7404580152671754) internal successors, (359), 131 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:29,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 359 transitions. [2021-05-03 14:03:29,850 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 359 transitions. Word has length 14 [2021-05-03 14:03:29,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:29,850 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 359 transitions. [2021-05-03 14:03:29,850 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) [2021-05-03 14:03:29,850 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 359 transitions. [2021-05-03 14:03:29,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:03:29,850 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:29,850 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:30,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-03 14:03:30,073 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:30,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:30,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1126578199, now seen corresponding path program 18 times [2021-05-03 14:03:30,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:30,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633153018] [2021-05-03 14:03:30,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:30,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:30,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633153018] [2021-05-03 14:03:30,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026878062] [2021-05-03 14:03:30,223 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 [2021-05-03 14:03:30,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:03:30,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:30,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:03:30,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:30,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:30,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-03 14:03:30,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953849523] [2021-05-03 14:03:30,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:03:30,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:30,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:03:30,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:03:30,318 INFO L87 Difference]: Start difference. First operand 132 states and 359 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) [2021-05-03 14:03:30,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:30,388 INFO L93 Difference]: Finished difference Result 208 states and 487 transitions. [2021-05-03 14:03:30,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:03:30,388 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 14 [2021-05-03 14:03:30,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:30,389 INFO L225 Difference]: With dead ends: 208 [2021-05-03 14:03:30,389 INFO L226 Difference]: Without dead ends: 206 [2021-05-03 14:03:30,391 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 138.1ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:03:30,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-05-03 14:03:30,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 151. [2021-05-03 14:03:30,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.8) internal successors, (420), 150 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:30,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 420 transitions. [2021-05-03 14:03:30,394 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 420 transitions. Word has length 14 [2021-05-03 14:03:30,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:30,394 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 420 transitions. [2021-05-03 14:03:30,395 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) [2021-05-03 14:03:30,395 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 420 transitions. [2021-05-03 14:03:30,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:03:30,395 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:30,395 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:30,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:30,611 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:30,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:30,611 INFO L82 PathProgramCache]: Analyzing trace with hash 591170861, now seen corresponding path program 19 times [2021-05-03 14:03:30,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:30,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863315269] [2021-05-03 14:03:30,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:30,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:30,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863315269] [2021-05-03 14:03:30,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907685564] [2021-05-03 14:03:30,661 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) [2021-05-03 14:03:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:30,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:03:30,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:30,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:30,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:30,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-03 14:03:30,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349247809] [2021-05-03 14:03:30,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:03:30,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:30,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:03:30,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:03:30,746 INFO L87 Difference]: Start difference. First operand 151 states and 420 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) [2021-05-03 14:03:30,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:30,803 INFO L93 Difference]: Finished difference Result 199 states and 469 transitions. [2021-05-03 14:03:30,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:03:30,803 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 14 [2021-05-03 14:03:30,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:30,804 INFO L225 Difference]: With dead ends: 199 [2021-05-03 14:03:30,804 INFO L226 Difference]: Without dead ends: 199 [2021-05-03 14:03:30,804 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:03:30,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-03 14:03:30,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 148. [2021-05-03 14:03:30,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.7687074829931975) internal successors, (407), 147 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:30,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 407 transitions. [2021-05-03 14:03:30,809 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 407 transitions. Word has length 14 [2021-05-03 14:03:30,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:30,809 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 407 transitions. [2021-05-03 14:03:30,809 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) [2021-05-03 14:03:30,809 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 407 transitions. [2021-05-03 14:03:30,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:03:30,809 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:30,809 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:31,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-03 14:03:31,025 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:31,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:31,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1137876473, now seen corresponding path program 20 times [2021-05-03 14:03:31,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:31,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575903581] [2021-05-03 14:03:31,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:31,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:31,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575903581] [2021-05-03 14:03:31,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570449755] [2021-05-03 14:03:31,076 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) [2021-05-03 14:03:31,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:03:31,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:31,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:03:31,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:31,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:31,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:03:31,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344845463] [2021-05-03 14:03:31,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:03:31,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:31,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:03:31,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:03:31,201 INFO L87 Difference]: Start difference. First operand 148 states and 407 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) [2021-05-03 14:03:31,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:31,346 INFO L93 Difference]: Finished difference Result 203 states and 476 transitions. [2021-05-03 14:03:31,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:03:31,346 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 14 [2021-05-03 14:03:31,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:31,347 INFO L225 Difference]: With dead ends: 203 [2021-05-03 14:03:31,347 INFO L226 Difference]: Without dead ends: 203 [2021-05-03 14:03:31,348 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:03:31,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-05-03 14:03:31,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 144. [2021-05-03 14:03:31,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.7482517482517483) internal successors, (393), 143 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:31,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 393 transitions. [2021-05-03 14:03:31,358 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 393 transitions. Word has length 14 [2021-05-03 14:03:31,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:31,358 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 393 transitions. [2021-05-03 14:03:31,358 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) [2021-05-03 14:03:31,358 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 393 transitions. [2021-05-03 14:03:31,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:03:31,359 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:31,359 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:31,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-03 14:03:31,574 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:31,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:31,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1096231021, now seen corresponding path program 21 times [2021-05-03 14:03:31,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:31,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649119927] [2021-05-03 14:03:31,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:31,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:31,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649119927] [2021-05-03 14:03:31,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232098339] [2021-05-03 14:03:31,627 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 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 [2021-05-03 14:03:31,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:03:31,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:31,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:03:31,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:31,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:31,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:03:31,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177405064] [2021-05-03 14:03:31,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:03:31,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:31,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:03:31,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:03:31,741 INFO L87 Difference]: Start difference. First operand 144 states and 393 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) [2021-05-03 14:03:31,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:31,882 INFO L93 Difference]: Finished difference Result 179 states and 442 transitions. [2021-05-03 14:03:31,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:03:31,888 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 14 [2021-05-03 14:03:31,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:31,889 INFO L225 Difference]: With dead ends: 179 [2021-05-03 14:03:31,889 INFO L226 Difference]: Without dead ends: 179 [2021-05-03 14:03:31,889 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:03:31,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-05-03 14:03:31,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 141. [2021-05-03 14:03:31,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.7357142857142858) internal successors, (383), 140 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:31,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 383 transitions. [2021-05-03 14:03:31,894 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 383 transitions. Word has length 14 [2021-05-03 14:03:31,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:31,894 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 383 transitions. [2021-05-03 14:03:31,894 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) [2021-05-03 14:03:31,894 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 383 transitions. [2021-05-03 14:03:31,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:03:31,894 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:31,894 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:32,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:32,109 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:32,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:32,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1634086599, now seen corresponding path program 22 times [2021-05-03 14:03:32,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:32,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818407964] [2021-05-03 14:03:32,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:32,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:32,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:32,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818407964] [2021-05-03 14:03:32,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633006491] [2021-05-03 14:03:32,617 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 [2021-05-03 14:03:32,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:03:32,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:32,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:03:32,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:32,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:32,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:32,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:03:32,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767037999] [2021-05-03 14:03:32,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:03:32,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:32,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:03:32,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:03:32,729 INFO L87 Difference]: Start difference. First operand 141 states and 383 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-05-03 14:03:32,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:32,874 INFO L93 Difference]: Finished difference Result 200 states and 499 transitions. [2021-05-03 14:03:32,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:03:32,875 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 14 [2021-05-03 14:03:32,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:32,876 INFO L225 Difference]: With dead ends: 200 [2021-05-03 14:03:32,876 INFO L226 Difference]: Without dead ends: 200 [2021-05-03 14:03:32,876 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 526.7ms TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:03:32,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-03 14:03:32,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 142. [2021-05-03 14:03:32,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.74468085106383) internal successors, (387), 141 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:32,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 387 transitions. [2021-05-03 14:03:32,880 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 387 transitions. Word has length 14 [2021-05-03 14:03:32,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:32,881 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 387 transitions. [2021-05-03 14:03:32,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-05-03 14:03:32,881 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 387 transitions. [2021-05-03 14:03:32,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:03:32,882 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:32,882 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:33,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-03 14:03:33,099 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:33,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:33,100 INFO L82 PathProgramCache]: Analyzing trace with hash 674548242, now seen corresponding path program 23 times [2021-05-03 14:03:33,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:33,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277809003] [2021-05-03 14:03:33,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:33,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:33,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:33,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277809003] [2021-05-03 14:03:33,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555045290] [2021-05-03 14:03:33,201 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 [2021-05-03 14:03:33,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:03:33,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:33,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:03:33,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:33,272 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:03:33,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:33,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-03 14:03:33,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141758707] [2021-05-03 14:03:33,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:03:33,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:33,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:03:33,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:03:33,273 INFO L87 Difference]: Start difference. First operand 142 states and 387 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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) [2021-05-03 14:03:33,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:33,314 INFO L93 Difference]: Finished difference Result 197 states and 465 transitions. [2021-05-03 14:03:33,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:03:33,315 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 15 [2021-05-03 14:03:33,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:33,316 INFO L225 Difference]: With dead ends: 197 [2021-05-03 14:03:33,316 INFO L226 Difference]: Without dead ends: 197 [2021-05-03 14:03:33,316 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:03:33,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-03 14:03:33,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 146. [2021-05-03 14:03:33,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.7448275862068967) internal successors, (398), 145 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:33,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 398 transitions. [2021-05-03 14:03:33,320 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 398 transitions. Word has length 15 [2021-05-03 14:03:33,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:33,320 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 398 transitions. [2021-05-03 14:03:33,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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) [2021-05-03 14:03:33,320 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 398 transitions. [2021-05-03 14:03:33,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:03:33,321 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:33,321 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:33,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:33,539 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:33,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:33,539 INFO L82 PathProgramCache]: Analyzing trace with hash -164351056, now seen corresponding path program 24 times [2021-05-03 14:03:33,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:33,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015156327] [2021-05-03 14:03:33,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:33,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:33,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015156327] [2021-05-03 14:03:33,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674082919] [2021-05-03 14:03:33,594 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 [2021-05-03 14:03:33,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:03:33,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:33,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:03:33,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:33,663 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:33,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:33,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2021-05-03 14:03:33,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378214363] [2021-05-03 14:03:33,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:03:33,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:33,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:03:33,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:03:33,665 INFO L87 Difference]: Start difference. First operand 146 states and 398 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-05-03 14:03:33,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:33,727 INFO L93 Difference]: Finished difference Result 194 states and 457 transitions. [2021-05-03 14:03:33,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:03:33,727 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 15 [2021-05-03 14:03:33,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:33,728 INFO L225 Difference]: With dead ends: 194 [2021-05-03 14:03:33,728 INFO L226 Difference]: Without dead ends: 192 [2021-05-03 14:03:33,728 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:03:33,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-05-03 14:03:33,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 146. [2021-05-03 14:03:33,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.731034482758621) internal successors, (396), 145 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:33,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 396 transitions. [2021-05-03 14:03:33,732 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 396 transitions. Word has length 15 [2021-05-03 14:03:33,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:33,732 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 396 transitions. [2021-05-03 14:03:33,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-05-03 14:03:33,732 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 396 transitions. [2021-05-03 14:03:33,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:03:33,734 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:33,734 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:33,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-03 14:03:33,952 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:33,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:33,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1325053940, now seen corresponding path program 25 times [2021-05-03 14:03:33,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:33,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756098585] [2021-05-03 14:03:33,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:33,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:34,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:34,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756098585] [2021-05-03 14:03:34,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006384395] [2021-05-03 14:03:34,020 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 [2021-05-03 14:03:34,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:34,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:03:34,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:34,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:34,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:34,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-05-03 14:03:34,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332355355] [2021-05-03 14:03:34,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:03:34,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:34,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:03:34,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:03:34,094 INFO L87 Difference]: Start difference. First operand 146 states and 396 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) [2021-05-03 14:03:34,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:34,171 INFO L93 Difference]: Finished difference Result 179 states and 439 transitions. [2021-05-03 14:03:34,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:03:34,172 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 15 [2021-05-03 14:03:34,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:34,172 INFO L225 Difference]: With dead ends: 179 [2021-05-03 14:03:34,173 INFO L226 Difference]: Without dead ends: 176 [2021-05-03 14:03:34,174 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:03:34,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-03 14:03:34,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 147. [2021-05-03 14:03:34,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.719178082191781) internal successors, (397), 146 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:34,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 397 transitions. [2021-05-03 14:03:34,179 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 397 transitions. Word has length 15 [2021-05-03 14:03:34,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:34,179 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 397 transitions. [2021-05-03 14:03:34,179 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) [2021-05-03 14:03:34,179 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 397 transitions. [2021-05-03 14:03:34,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:03:34,179 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:34,179 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:34,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-03 14:03:34,393 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:34,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:34,393 INFO L82 PathProgramCache]: Analyzing trace with hash 765538634, now seen corresponding path program 26 times [2021-05-03 14:03:34,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:34,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917217239] [2021-05-03 14:03:34,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:34,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:34,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917217239] [2021-05-03 14:03:34,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428120015] [2021-05-03 14:03:34,453 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 [2021-05-03 14:03:34,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:03:34,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:34,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:03:34,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:03:34,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:34,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-03 14:03:34,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119630881] [2021-05-03 14:03:34,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:03:34,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:34,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:03:34,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:03:34,545 INFO L87 Difference]: Start difference. First operand 147 states and 397 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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) [2021-05-03 14:03:34,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:34,595 INFO L93 Difference]: Finished difference Result 220 states and 505 transitions. [2021-05-03 14:03:34,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:03:34,596 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 15 [2021-05-03 14:03:34,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:34,597 INFO L225 Difference]: With dead ends: 220 [2021-05-03 14:03:34,597 INFO L226 Difference]: Without dead ends: 220 [2021-05-03 14:03:34,597 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:03:34,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-05-03 14:03:34,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 151. [2021-05-03 14:03:34,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.7333333333333334) internal successors, (410), 150 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:34,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 410 transitions. [2021-05-03 14:03:34,602 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 410 transitions. Word has length 15 [2021-05-03 14:03:34,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:34,602 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 410 transitions. [2021-05-03 14:03:34,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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) [2021-05-03 14:03:34,602 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 410 transitions. [2021-05-03 14:03:34,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:03:34,602 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:34,602 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:34,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-03 14:03:34,817 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:34,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:34,817 INFO L82 PathProgramCache]: Analyzing trace with hash -73360664, now seen corresponding path program 27 times [2021-05-03 14:03:34,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:34,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430904173] [2021-05-03 14:03:34,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:34,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:34,859 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:34,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430904173] [2021-05-03 14:03:34,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449061870] [2021-05-03 14:03:34,859 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 [2021-05-03 14:03:34,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:03:34,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:34,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:03:34,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:34,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:34,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:34,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:03:34,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760909000] [2021-05-03 14:03:34,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:03:34,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:34,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:03:34,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:03:34,925 INFO L87 Difference]: Start difference. First operand 151 states and 410 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) [2021-05-03 14:03:34,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:34,991 INFO L93 Difference]: Finished difference Result 207 states and 482 transitions. [2021-05-03 14:03:34,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:03:34,991 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 15 [2021-05-03 14:03:34,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:34,992 INFO L225 Difference]: With dead ends: 207 [2021-05-03 14:03:34,992 INFO L226 Difference]: Without dead ends: 205 [2021-05-03 14:03:34,992 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:03:34,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-05-03 14:03:34,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 151. [2021-05-03 14:03:34,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.72) internal successors, (408), 150 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:34,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 408 transitions. [2021-05-03 14:03:34,995 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 408 transitions. Word has length 15 [2021-05-03 14:03:34,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:34,995 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 408 transitions. [2021-05-03 14:03:34,995 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) [2021-05-03 14:03:34,995 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 408 transitions. [2021-05-03 14:03:34,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:03:34,995 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:34,995 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:35,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:35,209 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:35,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:35,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1416044332, now seen corresponding path program 28 times [2021-05-03 14:03:35,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:35,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898073271] [2021-05-03 14:03:35,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:35,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:35,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898073271] [2021-05-03 14:03:35,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465430034] [2021-05-03 14:03:35,248 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) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:35,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:03:35,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:35,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:03:35,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:35,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:35,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:35,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-05-03 14:03:35,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745404209] [2021-05-03 14:03:35,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:03:35,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:35,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:03:35,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:03:35,296 INFO L87 Difference]: Start difference. First operand 151 states and 408 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) [2021-05-03 14:03:35,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:35,367 INFO L93 Difference]: Finished difference Result 212 states and 487 transitions. [2021-05-03 14:03:35,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:03:35,367 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 15 [2021-05-03 14:03:35,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:35,368 INFO L225 Difference]: With dead ends: 212 [2021-05-03 14:03:35,368 INFO L226 Difference]: Without dead ends: 209 [2021-05-03 14:03:35,369 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:03:35,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-05-03 14:03:35,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 151. [2021-05-03 14:03:35,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.7133333333333334) internal successors, (407), 150 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:35,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 407 transitions. [2021-05-03 14:03:35,372 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 407 transitions. Word has length 15 [2021-05-03 14:03:35,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:35,372 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 407 transitions. [2021-05-03 14:03:35,372 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) [2021-05-03 14:03:35,372 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 407 transitions. [2021-05-03 14:03:35,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:03:35,372 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:35,372 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:35,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-03 14:03:35,587 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:35,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:35,587 INFO L82 PathProgramCache]: Analyzing trace with hash 342958952, now seen corresponding path program 29 times [2021-05-03 14:03:35,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:35,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741962736] [2021-05-03 14:03:35,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:35,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:35,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:35,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741962736] [2021-05-03 14:03:35,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595261955] [2021-05-03 14:03:35,623 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) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:35,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:03:35,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:35,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:03:35,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:35,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:35,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-05-03 14:03:35,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001000504] [2021-05-03 14:03:35,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:03:35,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:35,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:03:35,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:03:35,679 INFO L87 Difference]: Start difference. First operand 151 states and 407 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) [2021-05-03 14:03:35,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:35,736 INFO L93 Difference]: Finished difference Result 182 states and 465 transitions. [2021-05-03 14:03:35,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:03:35,736 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 15 [2021-05-03 14:03:35,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:35,737 INFO L225 Difference]: With dead ends: 182 [2021-05-03 14:03:35,737 INFO L226 Difference]: Without dead ends: 179 [2021-05-03 14:03:35,737 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:03:35,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-05-03 14:03:35,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 151. [2021-05-03 14:03:35,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.7066666666666666) internal successors, (406), 150 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:35,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 406 transitions. [2021-05-03 14:03:35,740 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 406 transitions. Word has length 15 [2021-05-03 14:03:35,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:35,740 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 406 transitions. [2021-05-03 14:03:35,740 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) [2021-05-03 14:03:35,740 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 406 transitions. [2021-05-03 14:03:35,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:03:35,740 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:35,740 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:35,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:35,941 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:35,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:35,941 INFO L82 PathProgramCache]: Analyzing trace with hash -708726510, now seen corresponding path program 30 times [2021-05-03 14:03:35,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:35,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544230347] [2021-05-03 14:03:35,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:35,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:35,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544230347] [2021-05-03 14:03:35,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077965359] [2021-05-03 14:03:35,994 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 [2021-05-03 14:03:36,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:03:36,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:36,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:03:36,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:36,059 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:36,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:36,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-05-03 14:03:36,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981008450] [2021-05-03 14:03:36,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:03:36,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:36,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:03:36,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:03:36,060 INFO L87 Difference]: Start difference. First operand 151 states and 406 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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) [2021-05-03 14:03:36,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:36,129 INFO L93 Difference]: Finished difference Result 262 states and 620 transitions. [2021-05-03 14:03:36,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:03:36,130 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 [2021-05-03 14:03:36,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:36,131 INFO L225 Difference]: With dead ends: 262 [2021-05-03 14:03:36,131 INFO L226 Difference]: Without dead ends: 262 [2021-05-03 14:03:36,131 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:03:36,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-03 14:03:36,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 175. [2021-05-03 14:03:36,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.839080459770115) internal successors, (494), 174 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:36,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 494 transitions. [2021-05-03 14:03:36,135 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 494 transitions. Word has length 15 [2021-05-03 14:03:36,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:36,135 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 494 transitions. [2021-05-03 14:03:36,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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) [2021-05-03 14:03:36,136 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 494 transitions. [2021-05-03 14:03:36,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:03:36,136 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:36,136 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:36,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-03 14:03:36,353 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:36,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:36,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1547625808, now seen corresponding path program 31 times [2021-05-03 14:03:36,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:36,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963615738] [2021-05-03 14:03:36,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:36,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963615738] [2021-05-03 14:03:36,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025320495] [2021-05-03 14:03:36,392 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 [2021-05-03 14:03:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:36,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:03:36,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:36,445 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:03:36,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:36,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2021-05-03 14:03:36,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19913391] [2021-05-03 14:03:36,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:03:36,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:36,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:03:36,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:03:36,446 INFO L87 Difference]: Start difference. First operand 175 states and 494 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) [2021-05-03 14:03:36,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:36,514 INFO L93 Difference]: Finished difference Result 242 states and 591 transitions. [2021-05-03 14:03:36,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:03:36,514 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 15 [2021-05-03 14:03:36,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:36,515 INFO L225 Difference]: With dead ends: 242 [2021-05-03 14:03:36,515 INFO L226 Difference]: Without dead ends: 240 [2021-05-03 14:03:36,516 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:03:36,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-03 14:03:36,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 175. [2021-05-03 14:03:36,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.8275862068965516) internal successors, (492), 174 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:36,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 492 transitions. [2021-05-03 14:03:36,520 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 492 transitions. Word has length 15 [2021-05-03 14:03:36,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:36,520 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 492 transitions. [2021-05-03 14:03:36,520 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) [2021-05-03 14:03:36,520 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 492 transitions. [2021-05-03 14:03:36,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:03:36,521 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:36,521 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:36,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-03 14:03:36,729 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:36,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:36,729 INFO L82 PathProgramCache]: Analyzing trace with hash -58220812, now seen corresponding path program 32 times [2021-05-03 14:03:36,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:36,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236363857] [2021-05-03 14:03:36,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:36,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:36,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236363857] [2021-05-03 14:03:36,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376900598] [2021-05-03 14:03:36,766 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 [2021-05-03 14:03:36,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:03:36,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:36,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:03:36,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:36,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:36,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:36,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-05-03 14:03:36,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161420687] [2021-05-03 14:03:36,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:03:36,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:36,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:03:36,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:03:36,837 INFO L87 Difference]: Start difference. First operand 175 states and 492 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) [2021-05-03 14:03:36,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:36,917 INFO L93 Difference]: Finished difference Result 247 states and 596 transitions. [2021-05-03 14:03:36,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:03:36,917 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 15 [2021-05-03 14:03:36,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:36,918 INFO L225 Difference]: With dead ends: 247 [2021-05-03 14:03:36,918 INFO L226 Difference]: Without dead ends: 244 [2021-05-03 14:03:36,918 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:03:36,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-05-03 14:03:36,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 179. [2021-05-03 14:03:36,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.842696629213483) internal successors, (506), 178 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:36,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 506 transitions. [2021-05-03 14:03:36,923 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 506 transitions. Word has length 15 [2021-05-03 14:03:36,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:36,923 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 506 transitions. [2021-05-03 14:03:36,923 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) [2021-05-03 14:03:36,923 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 506 transitions. [2021-05-03 14:03:36,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:03:36,923 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:36,923 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:37,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-03 14:03:37,141 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:37,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:37,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1131306192, now seen corresponding path program 33 times [2021-05-03 14:03:37,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:37,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406277998] [2021-05-03 14:03:37,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:37,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:37,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406277998] [2021-05-03 14:03:37,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984405314] [2021-05-03 14:03:37,180 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 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 [2021-05-03 14:03:37,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:03:37,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:37,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:03:37,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:37,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:37,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:37,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-05-03 14:03:37,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166807021] [2021-05-03 14:03:37,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:03:37,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:37,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:03:37,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:03:37,244 INFO L87 Difference]: Start difference. First operand 179 states and 506 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) [2021-05-03 14:03:37,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:37,312 INFO L93 Difference]: Finished difference Result 219 states and 577 transitions. [2021-05-03 14:03:37,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:03:37,312 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 15 [2021-05-03 14:03:37,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:37,313 INFO L225 Difference]: With dead ends: 219 [2021-05-03 14:03:37,313 INFO L226 Difference]: Without dead ends: 216 [2021-05-03 14:03:37,313 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:03:37,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-03 14:03:37,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 179. [2021-05-03 14:03:37,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.837078651685393) internal successors, (505), 178 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:37,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 505 transitions. [2021-05-03 14:03:37,317 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 505 transitions. Word has length 15 [2021-05-03 14:03:37,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:37,317 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 505 transitions. [2021-05-03 14:03:37,317 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) [2021-05-03 14:03:37,317 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 505 transitions. [2021-05-03 14:03:37,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:03:37,318 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:37,318 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:37,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-03 14:03:37,529 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:37,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:37,529 INFO L82 PathProgramCache]: Analyzing trace with hash -37214604, now seen corresponding path program 34 times [2021-05-03 14:03:37,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:37,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703433857] [2021-05-03 14:03:37,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:37,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:37,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:37,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703433857] [2021-05-03 14:03:37,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135647497] [2021-05-03 14:03:37,574 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 [2021-05-03 14:03:37,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:03:37,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:37,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:03:37,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:37,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:37,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:37,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-05-03 14:03:37,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489510301] [2021-05-03 14:03:37,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:03:37,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:37,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:03:37,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:03:37,649 INFO L87 Difference]: Start difference. First operand 179 states and 505 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) [2021-05-03 14:03:37,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:37,719 INFO L93 Difference]: Finished difference Result 212 states and 567 transitions. [2021-05-03 14:03:37,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:03:37,719 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 15 [2021-05-03 14:03:37,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:37,720 INFO L225 Difference]: With dead ends: 212 [2021-05-03 14:03:37,720 INFO L226 Difference]: Without dead ends: 208 [2021-05-03 14:03:37,720 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:03:37,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-05-03 14:03:37,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 179. [2021-05-03 14:03:37,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.831460674157303) internal successors, (504), 178 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:37,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 504 transitions. [2021-05-03 14:03:37,724 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 504 transitions. Word has length 15 [2021-05-03 14:03:37,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:37,724 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 504 transitions. [2021-05-03 14:03:37,724 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) [2021-05-03 14:03:37,724 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 504 transitions. [2021-05-03 14:03:37,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:03:37,725 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:37,725 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:37,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-03 14:03:37,942 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:37,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:37,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1066138199, now seen corresponding path program 35 times [2021-05-03 14:03:37,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:37,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956821517] [2021-05-03 14:03:37,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:37,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:38,021 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:03:38,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956821517] [2021-05-03 14:03:38,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542453212] [2021-05-03 14:03:38,021 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) [2021-05-03 14:03:38,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:03:38,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:38,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:03:38,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:38,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:03:38,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:38,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 14:03:38,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44756772] [2021-05-03 14:03:38,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:03:38,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:38,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:03:38,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:03:38,114 INFO L87 Difference]: Start difference. First operand 179 states and 504 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-05-03 14:03:38,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:38,207 INFO L93 Difference]: Finished difference Result 452 states and 1210 transitions. [2021-05-03 14:03:38,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:03:38,207 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 [2021-05-03 14:03:38,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:38,208 INFO L225 Difference]: With dead ends: 452 [2021-05-03 14:03:38,208 INFO L226 Difference]: Without dead ends: 448 [2021-05-03 14:03:38,209 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 117.7ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:03:38,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-05-03 14:03:38,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 236. [2021-05-03 14:03:38,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.748936170212766) internal successors, (646), 235 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:38,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 646 transitions. [2021-05-03 14:03:38,214 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 646 transitions. Word has length 16 [2021-05-03 14:03:38,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:38,214 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 646 transitions. [2021-05-03 14:03:38,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-05-03 14:03:38,214 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 646 transitions. [2021-05-03 14:03:38,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:03:38,214 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:38,215 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:38,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-03 14:03:38,430 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:38,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:38,430 INFO L82 PathProgramCache]: Analyzing trace with hash -2129828983, now seen corresponding path program 36 times [2021-05-03 14:03:38,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:38,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384337912] [2021-05-03 14:03:38,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:38,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:38,470 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:38,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384337912] [2021-05-03 14:03:38,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710565679] [2021-05-03 14:03:38,471 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 [2021-05-03 14:03:38,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:03:38,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:38,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:03:38,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:38,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:03:38,657 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 [2021-05-03 14:03:38,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:03:38,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:03:38,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:03:38,867 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-05-03 14:03:38,871 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:38,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:38,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-05-03 14:03:38,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575799620] [2021-05-03 14:03:38,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:03:38,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:38,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:03:38,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:03:38,872 INFO L87 Difference]: Start difference. First operand 236 states and 646 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) [2021-05-03 14:03:38,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:38,959 INFO L93 Difference]: Finished difference Result 318 states and 823 transitions. [2021-05-03 14:03:38,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:03:38,959 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 17 [2021-05-03 14:03:38,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:38,960 INFO L225 Difference]: With dead ends: 318 [2021-05-03 14:03:38,961 INFO L226 Difference]: Without dead ends: 315 [2021-05-03 14:03:38,961 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 104.2ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:03:38,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-05-03 14:03:38,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 284. [2021-05-03 14:03:38,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.7420494699646643) internal successors, (776), 283 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:38,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 776 transitions. [2021-05-03 14:03:38,966 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 776 transitions. Word has length 17 [2021-05-03 14:03:38,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:38,966 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 776 transitions. [2021-05-03 14:03:38,966 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) [2021-05-03 14:03:38,966 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 776 transitions. [2021-05-03 14:03:38,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:03:38,967 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:38,967 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:39,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-05-03 14:03:39,185 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:39,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:39,185 INFO L82 PathProgramCache]: Analyzing trace with hash 368526055, now seen corresponding path program 37 times [2021-05-03 14:03:39,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:39,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150413839] [2021-05-03 14:03:39,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:39,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150413839] [2021-05-03 14:03:39,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920148984] [2021-05-03 14:03:39,225 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 [2021-05-03 14:03:39,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:39,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:03:39,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:39,391 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:03:39,391 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 [2021-05-03 14:03:39,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:03:39,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:03:39,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:03:39,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-05-03 14:03:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:39,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:39,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-05-03 14:03:39,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299316385] [2021-05-03 14:03:39,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:03:39,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:39,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:03:39,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:03:39,512 INFO L87 Difference]: Start difference. First operand 284 states and 776 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) [2021-05-03 14:03:39,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:39,631 INFO L93 Difference]: Finished difference Result 363 states and 957 transitions. [2021-05-03 14:03:39,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:03:39,631 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 17 [2021-05-03 14:03:39,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:39,633 INFO L225 Difference]: With dead ends: 363 [2021-05-03 14:03:39,633 INFO L226 Difference]: Without dead ends: 359 [2021-05-03 14:03:39,633 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:03:39,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-05-03 14:03:39,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 326. [2021-05-03 14:03:39,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.766153846153846) internal successors, (899), 325 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:39,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 899 transitions. [2021-05-03 14:03:39,637 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 899 transitions. Word has length 17 [2021-05-03 14:03:39,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:39,637 INFO L480 AbstractCegarLoop]: Abstraction has 326 states and 899 transitions. [2021-05-03 14:03:39,637 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) [2021-05-03 14:03:39,637 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 899 transitions. [2021-05-03 14:03:39,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:03:39,638 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:39,638 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:39,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:39,852 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:39,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:39,852 INFO L82 PathProgramCache]: Analyzing trace with hash 527358741, now seen corresponding path program 38 times [2021-05-03 14:03:39,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:39,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637671197] [2021-05-03 14:03:39,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:39,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:39,890 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:39,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637671197] [2021-05-03 14:03:39,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441793912] [2021-05-03 14:03:39,890 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) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:39,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:03:39,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:39,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:03:39,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:40,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:03:40,042 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 [2021-05-03 14:03:40,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:03:40,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:03:40,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:03:40,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-05-03 14:03:40,164 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:40,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:40,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-05-03 14:03:40,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689199000] [2021-05-03 14:03:40,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:03:40,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:40,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:03:40,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:03:40,165 INFO L87 Difference]: Start difference. First operand 326 states and 899 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) [2021-05-03 14:03:40,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:40,272 INFO L93 Difference]: Finished difference Result 412 states and 1100 transitions. [2021-05-03 14:03:40,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:03:40,272 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 17 [2021-05-03 14:03:40,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:40,273 INFO L225 Difference]: With dead ends: 412 [2021-05-03 14:03:40,273 INFO L226 Difference]: Without dead ends: 408 [2021-05-03 14:03:40,274 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:03:40,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-05-03 14:03:40,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 370. [2021-05-03 14:03:40,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.8048780487804876) internal successors, (1035), 369 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) [2021-05-03 14:03:40,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1035 transitions. [2021-05-03 14:03:40,278 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1035 transitions. Word has length 17 [2021-05-03 14:03:40,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:40,278 INFO L480 AbstractCegarLoop]: Abstraction has 370 states and 1035 transitions. [2021-05-03 14:03:40,278 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) [2021-05-03 14:03:40,278 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1035 transitions. [2021-05-03 14:03:40,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:03:40,279 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:40,279 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:40,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-05-03 14:03:40,493 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:40,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:40,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1156204711, now seen corresponding path program 39 times [2021-05-03 14:03:40,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:40,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868444169] [2021-05-03 14:03:40,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:40,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:03:40,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868444169] [2021-05-03 14:03:40,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420470221] [2021-05-03 14:03:40,528 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 [2021-05-03 14:03:40,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:03:40,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:40,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:03:40,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:40,692 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:03:40,692 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 [2021-05-03 14:03:40,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:03:40,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:03:40,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:03:40,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-05-03 14:03:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:40,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:40,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-05-03 14:03:40,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108402871] [2021-05-03 14:03:40,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:03:40,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:40,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:03:40,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:03:40,851 INFO L87 Difference]: Start difference. First operand 370 states and 1035 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) [2021-05-03 14:03:40,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:40,963 INFO L93 Difference]: Finished difference Result 474 states and 1277 transitions. [2021-05-03 14:03:40,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:03:40,964 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 17 [2021-05-03 14:03:40,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:40,966 INFO L225 Difference]: With dead ends: 474 [2021-05-03 14:03:40,966 INFO L226 Difference]: Without dead ends: 470 [2021-05-03 14:03:40,967 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 99.7ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:03:40,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-05-03 14:03:40,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 421. [2021-05-03 14:03:40,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.85) internal successors, (1197), 420 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) [2021-05-03 14:03:40,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1197 transitions. [2021-05-03 14:03:40,976 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1197 transitions. Word has length 17 [2021-05-03 14:03:40,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:40,978 INFO L480 AbstractCegarLoop]: Abstraction has 421 states and 1197 transitions. [2021-05-03 14:03:40,978 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) [2021-05-03 14:03:40,978 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1197 transitions. [2021-05-03 14:03:40,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:03:40,979 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:40,979 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:41,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:41,185 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:41,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:41,185 INFO L82 PathProgramCache]: Analyzing trace with hash -824406699, now seen corresponding path program 40 times [2021-05-03 14:03:41,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:41,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091403329] [2021-05-03 14:03:41,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:41,222 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:41,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091403329] [2021-05-03 14:03:41,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818157052] [2021-05-03 14:03:41,222 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 [2021-05-03 14:03:41,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:03:41,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:41,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:03:41,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:41,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:03:41,406 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 [2021-05-03 14:03:41,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:03:41,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:03:41,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:03:41,521 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-05-03 14:03:41,527 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:41,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:41,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-05-03 14:03:41,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517820966] [2021-05-03 14:03:41,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:03:41,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:41,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:03:41,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:03:41,528 INFO L87 Difference]: Start difference. First operand 421 states and 1197 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) [2021-05-03 14:03:41,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:41,657 INFO L93 Difference]: Finished difference Result 501 states and 1382 transitions. [2021-05-03 14:03:41,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:03:41,658 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 17 [2021-05-03 14:03:41,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:41,660 INFO L225 Difference]: With dead ends: 501 [2021-05-03 14:03:41,660 INFO L226 Difference]: Without dead ends: 498 [2021-05-03 14:03:41,660 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 104.2ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:03:41,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-05-03 14:03:41,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 462. [2021-05-03 14:03:41,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.8720173535791758) internal successors, (1324), 461 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:41,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1324 transitions. [2021-05-03 14:03:41,668 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1324 transitions. Word has length 17 [2021-05-03 14:03:41,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:41,668 INFO L480 AbstractCegarLoop]: Abstraction has 462 states and 1324 transitions. [2021-05-03 14:03:41,668 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) [2021-05-03 14:03:41,668 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1324 transitions. [2021-05-03 14:03:41,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:03:41,669 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:41,669 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:41,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:41,883 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:41,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:41,883 INFO L82 PathProgramCache]: Analyzing trace with hash -2093818265, now seen corresponding path program 41 times [2021-05-03 14:03:41,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:41,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132545524] [2021-05-03 14:03:41,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:41,923 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:41,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132545524] [2021-05-03 14:03:41,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641805135] [2021-05-03 14:03:41,923 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 [2021-05-03 14:03:41,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:03:41,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:41,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:03:41,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:42,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:03:42,106 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 [2021-05-03 14:03:42,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:03:42,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:03:42,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:03:42,266 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-05-03 14:03:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:42,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:42,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-05-03 14:03:42,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164903815] [2021-05-03 14:03:42,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:03:42,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:42,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:03:42,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:03:42,273 INFO L87 Difference]: Start difference. First operand 462 states and 1324 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) [2021-05-03 14:03:42,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:42,391 INFO L93 Difference]: Finished difference Result 537 states and 1487 transitions. [2021-05-03 14:03:42,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:03:42,391 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 17 [2021-05-03 14:03:42,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:42,393 INFO L225 Difference]: With dead ends: 537 [2021-05-03 14:03:42,393 INFO L226 Difference]: Without dead ends: 534 [2021-05-03 14:03:42,393 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:03:42,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-05-03 14:03:42,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 497. [2021-05-03 14:03:42,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.8891129032258065) internal successors, (1433), 496 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:42,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1433 transitions. [2021-05-03 14:03:42,401 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1433 transitions. Word has length 17 [2021-05-03 14:03:42,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:42,401 INFO L480 AbstractCegarLoop]: Abstraction has 497 states and 1433 transitions. [2021-05-03 14:03:42,402 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) [2021-05-03 14:03:42,402 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1433 transitions. [2021-05-03 14:03:42,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:03:42,403 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:42,403 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:42,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-05-03 14:03:42,617 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:42,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:42,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1504096149, now seen corresponding path program 42 times [2021-05-03 14:03:42,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:42,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886810108] [2021-05-03 14:03:42,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:42,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:42,654 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:42,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886810108] [2021-05-03 14:03:42,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166883758] [2021-05-03 14:03:42,654 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) [2021-05-03 14:03:42,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:03:42,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:42,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:03:42,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:42,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:03:42,850 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 [2021-05-03 14:03:42,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:03:42,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:03:42,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:03:42,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-05-03 14:03:42,969 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:42,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:42,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-05-03 14:03:42,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447108766] [2021-05-03 14:03:42,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:03:42,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:42,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:03:42,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:03:42,971 INFO L87 Difference]: Start difference. First operand 497 states and 1433 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) [2021-05-03 14:03:43,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:43,102 INFO L93 Difference]: Finished difference Result 574 states and 1592 transitions. [2021-05-03 14:03:43,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:03:43,102 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 17 [2021-05-03 14:03:43,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:43,104 INFO L225 Difference]: With dead ends: 574 [2021-05-03 14:03:43,104 INFO L226 Difference]: Without dead ends: 571 [2021-05-03 14:03:43,105 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 114.4ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:03:43,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-05-03 14:03:43,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 529. [2021-05-03 14:03:43,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 2.9015151515151514) internal successors, (1532), 528 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:43,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1532 transitions. [2021-05-03 14:03:43,114 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1532 transitions. Word has length 17 [2021-05-03 14:03:43,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:43,114 INFO L480 AbstractCegarLoop]: Abstraction has 529 states and 1532 transitions. [2021-05-03 14:03:43,115 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) [2021-05-03 14:03:43,115 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1532 transitions. [2021-05-03 14:03:43,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:43,116 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:43,116 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:43,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:43,329 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:43,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:43,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1577117358, now seen corresponding path program 43 times [2021-05-03 14:03:43,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:43,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300358600] [2021-05-03 14:03:43,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:43,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:43,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300358600] [2021-05-03 14:03:43,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373251211] [2021-05-03 14:03:43,388 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 [2021-05-03 14:03:43,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:43,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:43,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:43,452 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:43,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:43,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:03:43,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531786714] [2021-05-03 14:03:43,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:03:43,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:43,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:03:43,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:03:43,453 INFO L87 Difference]: Start difference. First operand 529 states and 1532 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-05-03 14:03:43,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:43,617 INFO L93 Difference]: Finished difference Result 696 states and 1799 transitions. [2021-05-03 14:03:43,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:03:43,618 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-05-03 14:03:43,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:43,620 INFO L225 Difference]: With dead ends: 696 [2021-05-03 14:03:43,620 INFO L226 Difference]: Without dead ends: 689 [2021-05-03 14:03:43,620 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 135.0ms TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:03:43,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-05-03 14:03:43,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 549. [2021-05-03 14:03:43,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.906934306569343) internal successors, (1593), 548 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:43,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1593 transitions. [2021-05-03 14:03:43,633 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1593 transitions. Word has length 18 [2021-05-03 14:03:43,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:43,633 INFO L480 AbstractCegarLoop]: Abstraction has 549 states and 1593 transitions. [2021-05-03 14:03:43,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-05-03 14:03:43,633 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1593 transitions. [2021-05-03 14:03:43,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:43,634 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:43,634 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:43,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-05-03 14:03:43,849 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:43,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:43,849 INFO L82 PathProgramCache]: Analyzing trace with hash 121393866, now seen corresponding path program 44 times [2021-05-03 14:03:43,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:43,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649222588] [2021-05-03 14:03:43,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:43,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:43,902 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:43,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649222588] [2021-05-03 14:03:43,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899667107] [2021-05-03 14:03:43,903 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 [2021-05-03 14:03:43,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:03:43,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:43,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:43,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:43,956 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:43,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:43,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:03:43,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190203787] [2021-05-03 14:03:43,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:03:43,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:43,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:03:43,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:03:43,957 INFO L87 Difference]: Start difference. First operand 549 states and 1593 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) [2021-05-03 14:03:44,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:44,002 INFO L93 Difference]: Finished difference Result 706 states and 1828 transitions. [2021-05-03 14:03:44,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:03:44,002 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 18 [2021-05-03 14:03:44,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:44,004 INFO L225 Difference]: With dead ends: 706 [2021-05-03 14:03:44,005 INFO L226 Difference]: Without dead ends: 706 [2021-05-03 14:03:44,005 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:03:44,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-05-03 14:03:44,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 525. [2021-05-03 14:03:44,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 2.8874045801526718) internal successors, (1513), 524 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:44,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1513 transitions. [2021-05-03 14:03:44,013 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1513 transitions. Word has length 18 [2021-05-03 14:03:44,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:44,013 INFO L480 AbstractCegarLoop]: Abstraction has 525 states and 1513 transitions. [2021-05-03 14:03:44,014 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) [2021-05-03 14:03:44,014 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1513 transitions. [2021-05-03 14:03:44,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:44,015 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:44,015 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:44,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-05-03 14:03:44,221 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:44,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:44,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1437522508, now seen corresponding path program 45 times [2021-05-03 14:03:44,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:44,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772708130] [2021-05-03 14:03:44,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:44,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:44,264 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:44,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772708130] [2021-05-03 14:03:44,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892714231] [2021-05-03 14:03:44,264 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 [2021-05-03 14:03:44,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:03:44,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:44,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:44,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:44,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:44,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:03:44,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141959018] [2021-05-03 14:03:44,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:03:44,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:44,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:03:44,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:03:44,308 INFO L87 Difference]: Start difference. First operand 525 states and 1513 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) [2021-05-03 14:03:44,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:44,402 INFO L93 Difference]: Finished difference Result 683 states and 1762 transitions. [2021-05-03 14:03:44,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:03:44,403 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 18 [2021-05-03 14:03:44,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:44,405 INFO L225 Difference]: With dead ends: 683 [2021-05-03 14:03:44,405 INFO L226 Difference]: Without dead ends: 681 [2021-05-03 14:03:44,405 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 70.4ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:03:44,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-05-03 14:03:44,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 547. [2021-05-03 14:03:44,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 2.8956043956043955) internal successors, (1581), 546 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:44,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1581 transitions. [2021-05-03 14:03:44,416 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1581 transitions. Word has length 18 [2021-05-03 14:03:44,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:44,416 INFO L480 AbstractCegarLoop]: Abstraction has 547 states and 1581 transitions. [2021-05-03 14:03:44,416 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) [2021-05-03 14:03:44,416 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1581 transitions. [2021-05-03 14:03:44,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:44,417 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:44,417 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:44,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-05-03 14:03:44,632 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:44,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:44,633 INFO L82 PathProgramCache]: Analyzing trace with hash 280226552, now seen corresponding path program 46 times [2021-05-03 14:03:44,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:44,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531755734] [2021-05-03 14:03:44,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:44,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:44,679 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:44,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531755734] [2021-05-03 14:03:44,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414638091] [2021-05-03 14:03:44,680 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 [2021-05-03 14:03:44,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:03:44,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:44,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:44,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:44,773 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:44,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:44,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:03:44,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576662679] [2021-05-03 14:03:44,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:03:44,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:44,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:03:44,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:03:44,773 INFO L87 Difference]: Start difference. First operand 547 states and 1581 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) [2021-05-03 14:03:44,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:44,812 INFO L93 Difference]: Finished difference Result 721 states and 1842 transitions. [2021-05-03 14:03:44,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:03:44,812 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 18 [2021-05-03 14:03:44,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:44,814 INFO L225 Difference]: With dead ends: 721 [2021-05-03 14:03:44,814 INFO L226 Difference]: Without dead ends: 721 [2021-05-03 14:03:44,814 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:03:44,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-05-03 14:03:44,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 548. [2021-05-03 14:03:44,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 2.895795246800731) internal successors, (1584), 547 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:44,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1584 transitions. [2021-05-03 14:03:44,823 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1584 transitions. Word has length 18 [2021-05-03 14:03:44,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:44,824 INFO L480 AbstractCegarLoop]: Abstraction has 548 states and 1584 transitions. [2021-05-03 14:03:44,824 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) [2021-05-03 14:03:44,824 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1584 transitions. [2021-05-03 14:03:44,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:44,824 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:44,825 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:45,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:45,038 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:45,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:45,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1448820782, now seen corresponding path program 47 times [2021-05-03 14:03:45,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:45,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26346490] [2021-05-03 14:03:45,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:45,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:45,085 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:45,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26346490] [2021-05-03 14:03:45,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739688407] [2021-05-03 14:03:45,085 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 [2021-05-03 14:03:45,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:03:45,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:45,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:45,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:45,156 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:45,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:45,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:03:45,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100043894] [2021-05-03 14:03:45,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:03:45,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:45,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:03:45,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:03:45,157 INFO L87 Difference]: Start difference. First operand 548 states and 1584 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) [2021-05-03 14:03:45,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:45,223 INFO L93 Difference]: Finished difference Result 777 states and 1974 transitions. [2021-05-03 14:03:45,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:03:45,223 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 18 [2021-05-03 14:03:45,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:45,226 INFO L225 Difference]: With dead ends: 777 [2021-05-03 14:03:45,227 INFO L226 Difference]: Without dead ends: 777 [2021-05-03 14:03:45,227 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:03:45,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-05-03 14:03:45,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 523. [2021-05-03 14:03:45,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 2.875478927203065) internal successors, (1501), 522 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:45,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1501 transitions. [2021-05-03 14:03:45,237 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1501 transitions. Word has length 18 [2021-05-03 14:03:45,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:45,237 INFO L480 AbstractCegarLoop]: Abstraction has 523 states and 1501 transitions. [2021-05-03 14:03:45,237 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) [2021-05-03 14:03:45,237 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1501 transitions. [2021-05-03 14:03:45,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:45,238 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:45,238 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:45,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:45,443 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:45,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:45,443 INFO L82 PathProgramCache]: Analyzing trace with hash -808676538, now seen corresponding path program 48 times [2021-05-03 14:03:45,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:45,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849304635] [2021-05-03 14:03:45,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:45,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:45,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849304635] [2021-05-03 14:03:45,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394250067] [2021-05-03 14:03:45,486 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) [2021-05-03 14:03:45,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:03:45,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:45,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:45,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:45,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:45,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:03:45,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967445777] [2021-05-03 14:03:45,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:03:45,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:45,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:03:45,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:03:45,546 INFO L87 Difference]: Start difference. First operand 523 states and 1501 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) [2021-05-03 14:03:45,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:45,638 INFO L93 Difference]: Finished difference Result 678 states and 1749 transitions. [2021-05-03 14:03:45,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:03:45,639 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 18 [2021-05-03 14:03:45,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:45,641 INFO L225 Difference]: With dead ends: 678 [2021-05-03 14:03:45,641 INFO L226 Difference]: Without dead ends: 676 [2021-05-03 14:03:45,641 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:03:45,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-05-03 14:03:45,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 547. [2021-05-03 14:03:45,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 2.880952380952381) internal successors, (1573), 546 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:45,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1573 transitions. [2021-05-03 14:03:45,649 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1573 transitions. Word has length 18 [2021-05-03 14:03:45,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:45,649 INFO L480 AbstractCegarLoop]: Abstraction has 547 states and 1573 transitions. [2021-05-03 14:03:45,649 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) [2021-05-03 14:03:45,649 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1573 transitions. [2021-05-03 14:03:45,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:45,650 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:45,650 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:45,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:45,865 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:45,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:45,865 INFO L82 PathProgramCache]: Analyzing trace with hash 909072522, now seen corresponding path program 49 times [2021-05-03 14:03:45,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:45,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562492173] [2021-05-03 14:03:45,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:45,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:45,927 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:45,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562492173] [2021-05-03 14:03:45,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637723746] [2021-05-03 14:03:45,927 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 [2021-05-03 14:03:45,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:45,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:45,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:46,036 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:46,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:46,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:03:46,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088298278] [2021-05-03 14:03:46,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:03:46,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:46,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:03:46,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:03:46,039 INFO L87 Difference]: Start difference. First operand 547 states and 1573 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) [2021-05-03 14:03:46,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:46,138 INFO L93 Difference]: Finished difference Result 708 states and 1807 transitions. [2021-05-03 14:03:46,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:03:46,153 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 18 [2021-05-03 14:03:46,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:46,155 INFO L225 Difference]: With dead ends: 708 [2021-05-03 14:03:46,155 INFO L226 Difference]: Without dead ends: 708 [2021-05-03 14:03:46,156 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:03:46,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-05-03 14:03:46,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 547. [2021-05-03 14:03:46,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 2.880952380952381) internal successors, (1573), 546 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:46,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1573 transitions. [2021-05-03 14:03:46,165 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1573 transitions. Word has length 18 [2021-05-03 14:03:46,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:46,166 INFO L480 AbstractCegarLoop]: Abstraction has 547 states and 1573 transitions. [2021-05-03 14:03:46,166 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) [2021-05-03 14:03:46,166 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1573 transitions. [2021-05-03 14:03:46,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:46,167 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:46,167 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:46,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:46,390 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:46,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:46,390 INFO L82 PathProgramCache]: Analyzing trace with hash -819974812, now seen corresponding path program 50 times [2021-05-03 14:03:46,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:46,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103101030] [2021-05-03 14:03:46,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:46,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:46,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103101030] [2021-05-03 14:03:46,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109230720] [2021-05-03 14:03:46,455 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 [2021-05-03 14:03:46,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:03:46,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:46,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:46,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:47,112 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:47,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:47,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:03:47,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775668458] [2021-05-03 14:03:47,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:03:47,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:47,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:03:47,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:03:47,113 INFO L87 Difference]: Start difference. First operand 547 states and 1573 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) [2021-05-03 14:03:47,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:47,181 INFO L93 Difference]: Finished difference Result 767 states and 1938 transitions. [2021-05-03 14:03:47,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:03:47,182 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 18 [2021-05-03 14:03:47,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:47,184 INFO L225 Difference]: With dead ends: 767 [2021-05-03 14:03:47,184 INFO L226 Difference]: Without dead ends: 767 [2021-05-03 14:03:47,185 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:03:47,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-05-03 14:03:47,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 520. [2021-05-03 14:03:47,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 2.859344894026975) internal successors, (1484), 519 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:47,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1484 transitions. [2021-05-03 14:03:47,221 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1484 transitions. Word has length 18 [2021-05-03 14:03:47,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:47,221 INFO L480 AbstractCegarLoop]: Abstraction has 520 states and 1484 transitions. [2021-05-03 14:03:47,221 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) [2021-05-03 14:03:47,221 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1484 transitions. [2021-05-03 14:03:47,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:47,222 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:47,222 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:47,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-05-03 14:03:47,441 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:47,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:47,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1414132682, now seen corresponding path program 51 times [2021-05-03 14:03:47,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:47,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191474474] [2021-05-03 14:03:47,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:47,503 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:47,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191474474] [2021-05-03 14:03:47,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571231749] [2021-05-03 14:03:47,503 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 [2021-05-03 14:03:47,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:03:47,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:47,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:47,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:47,632 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:47,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:47,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:03:47,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170793806] [2021-05-03 14:03:47,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:03:47,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:47,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:03:47,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:03:47,634 INFO L87 Difference]: Start difference. First operand 520 states and 1484 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) [2021-05-03 14:03:47,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:47,761 INFO L93 Difference]: Finished difference Result 976 states and 2581 transitions. [2021-05-03 14:03:47,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:03:47,762 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 18 [2021-05-03 14:03:47,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:47,765 INFO L225 Difference]: With dead ends: 976 [2021-05-03 14:03:47,765 INFO L226 Difference]: Without dead ends: 976 [2021-05-03 14:03:47,765 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:03:47,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-05-03 14:03:47,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 701. [2021-05-03 14:03:47,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 2.9371428571428573) internal successors, (2056), 700 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:47,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 2056 transitions. [2021-05-03 14:03:47,779 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 2056 transitions. Word has length 18 [2021-05-03 14:03:47,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:47,779 INFO L480 AbstractCegarLoop]: Abstraction has 701 states and 2056 transitions. [2021-05-03 14:03:47,779 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) [2021-05-03 14:03:47,779 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 2056 transitions. [2021-05-03 14:03:47,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:47,780 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:47,780 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:47,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-05-03 14:03:47,998 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:47,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:47,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1505679348, now seen corresponding path program 52 times [2021-05-03 14:03:47,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:47,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251920860] [2021-05-03 14:03:47,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:48,039 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:48,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251920860] [2021-05-03 14:03:48,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447833478] [2021-05-03 14:03:48,039 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) [2021-05-03 14:03:48,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:03:48,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:48,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:48,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:48,154 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:48,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:48,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:03:48,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320766065] [2021-05-03 14:03:48,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:03:48,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:48,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:03:48,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:03:48,156 INFO L87 Difference]: Start difference. First operand 701 states and 2056 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) [2021-05-03 14:03:48,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:48,271 INFO L93 Difference]: Finished difference Result 888 states and 2419 transitions. [2021-05-03 14:03:48,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:03:48,272 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 18 [2021-05-03 14:03:48,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:48,275 INFO L225 Difference]: With dead ends: 888 [2021-05-03 14:03:48,275 INFO L226 Difference]: Without dead ends: 886 [2021-05-03 14:03:48,275 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:03:48,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-05-03 14:03:48,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 764. [2021-05-03 14:03:48,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 2.9436435124508518) internal successors, (2246), 763 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:48,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2246 transitions. [2021-05-03 14:03:48,290 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2246 transitions. Word has length 18 [2021-05-03 14:03:48,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:48,290 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 2246 transitions. [2021-05-03 14:03:48,291 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) [2021-05-03 14:03:48,291 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2246 transitions. [2021-05-03 14:03:48,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:48,292 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:48,292 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:48,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-05-03 14:03:48,509 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:48,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:48,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1071538888, now seen corresponding path program 53 times [2021-05-03 14:03:48,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:48,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809025392] [2021-05-03 14:03:48,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:48,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809025392] [2021-05-03 14:03:48,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158188681] [2021-05-03 14:03:48,609 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 [2021-05-03 14:03:48,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:03:48,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:48,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:48,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:48,658 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:48,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:48,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:03:48,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12743987] [2021-05-03 14:03:48,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:03:48,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:48,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:03:48,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:03:48,660 INFO L87 Difference]: Start difference. First operand 764 states and 2246 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) [2021-05-03 14:03:48,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:48,696 INFO L93 Difference]: Finished difference Result 882 states and 2384 transitions. [2021-05-03 14:03:48,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:03:48,697 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 18 [2021-05-03 14:03:48,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:48,711 INFO L225 Difference]: With dead ends: 882 [2021-05-03 14:03:48,711 INFO L226 Difference]: Without dead ends: 882 [2021-05-03 14:03:48,711 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:03:48,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-05-03 14:03:48,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 755. [2021-05-03 14:03:48,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 2.9323607427055705) internal successors, (2211), 754 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:48,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2211 transitions. [2021-05-03 14:03:48,721 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2211 transitions. Word has length 18 [2021-05-03 14:03:48,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:48,721 INFO L480 AbstractCegarLoop]: Abstraction has 755 states and 2211 transitions. [2021-05-03 14:03:48,721 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) [2021-05-03 14:03:48,722 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2211 transitions. [2021-05-03 14:03:48,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:48,722 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:48,722 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:48,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-05-03 14:03:48,937 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:48,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:48,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1494381074, now seen corresponding path program 54 times [2021-05-03 14:03:48,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:48,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688441694] [2021-05-03 14:03:48,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:48,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:49,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688441694] [2021-05-03 14:03:49,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346643999] [2021-05-03 14:03:49,009 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 [2021-05-03 14:03:49,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:03:49,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:49,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:49,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:49,076 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:49,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:49,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:03:49,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497663962] [2021-05-03 14:03:49,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:03:49,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:49,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:03:49,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:03:49,077 INFO L87 Difference]: Start difference. First operand 755 states and 2211 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) [2021-05-03 14:03:49,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:49,136 INFO L93 Difference]: Finished difference Result 936 states and 2510 transitions. [2021-05-03 14:03:49,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:03:49,136 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 18 [2021-05-03 14:03:49,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:49,138 INFO L225 Difference]: With dead ends: 936 [2021-05-03 14:03:49,138 INFO L226 Difference]: Without dead ends: 936 [2021-05-03 14:03:49,138 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:03:49,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-05-03 14:03:49,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 710. [2021-05-03 14:03:49,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 2.913963328631876) internal successors, (2066), 709 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:49,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2066 transitions. [2021-05-03 14:03:49,147 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2066 transitions. Word has length 18 [2021-05-03 14:03:49,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:49,147 INFO L480 AbstractCegarLoop]: Abstraction has 710 states and 2066 transitions. [2021-05-03 14:03:49,147 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) [2021-05-03 14:03:49,148 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2066 transitions. [2021-05-03 14:03:49,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:49,148 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:49,148 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:49,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:49,363 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:49,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:49,364 INFO L82 PathProgramCache]: Analyzing trace with hash -566478728, now seen corresponding path program 55 times [2021-05-03 14:03:49,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:49,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418720879] [2021-05-03 14:03:49,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:49,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:49,419 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:49,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418720879] [2021-05-03 14:03:49,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141118769] [2021-05-03 14:03:49,419 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:49,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:49,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:49,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:49,468 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:49,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:49,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:03:49,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085425151] [2021-05-03 14:03:49,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:03:49,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:49,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:03:49,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:03:49,468 INFO L87 Difference]: Start difference. First operand 710 states and 2066 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) [2021-05-03 14:03:49,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:49,551 INFO L93 Difference]: Finished difference Result 1110 states and 3081 transitions. [2021-05-03 14:03:49,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:03:49,551 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 18 [2021-05-03 14:03:49,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:49,553 INFO L225 Difference]: With dead ends: 1110 [2021-05-03 14:03:49,553 INFO L226 Difference]: Without dead ends: 1110 [2021-05-03 14:03:49,553 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:03:49,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-05-03 14:03:49,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 950. [2021-05-03 14:03:49,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 949 states have (on average 2.9736564805057957) internal successors, (2822), 949 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:49,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 2822 transitions. [2021-05-03 14:03:49,565 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 2822 transitions. Word has length 18 [2021-05-03 14:03:49,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:49,565 INFO L480 AbstractCegarLoop]: Abstraction has 950 states and 2822 transitions. [2021-05-03 14:03:49,565 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) [2021-05-03 14:03:49,565 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 2822 transitions. [2021-05-03 14:03:49,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:49,566 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:49,566 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:49,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-05-03 14:03:49,781 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:49,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:49,782 INFO L82 PathProgramCache]: Analyzing trace with hash -28623150, now seen corresponding path program 56 times [2021-05-03 14:03:49,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:49,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397234776] [2021-05-03 14:03:49,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:49,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:49,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397234776] [2021-05-03 14:03:49,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813795170] [2021-05-03 14:03:49,850 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 [2021-05-03 14:03:49,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:03:49,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:49,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:49,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:49,913 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:49,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:49,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:03:49,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271991099] [2021-05-03 14:03:49,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:03:49,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:49,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:03:49,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:03:49,914 INFO L87 Difference]: Start difference. First operand 950 states and 2822 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) [2021-05-03 14:03:50,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:50,044 INFO L93 Difference]: Finished difference Result 1384 states and 3920 transitions. [2021-05-03 14:03:50,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:03:50,044 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 18 [2021-05-03 14:03:50,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:50,047 INFO L225 Difference]: With dead ends: 1384 [2021-05-03 14:03:50,047 INFO L226 Difference]: Without dead ends: 1384 [2021-05-03 14:03:50,047 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 118.4ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:03:50,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-05-03 14:03:50,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1190. [2021-05-03 14:03:50,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 3.015138772077376) internal successors, (3585), 1189 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:50,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 3585 transitions. [2021-05-03 14:03:50,069 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 3585 transitions. Word has length 18 [2021-05-03 14:03:50,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:50,069 INFO L480 AbstractCegarLoop]: Abstraction has 1190 states and 3585 transitions. [2021-05-03 14:03:50,069 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) [2021-05-03 14:03:50,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 3585 transitions. [2021-05-03 14:03:50,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:50,071 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:50,071 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:50,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable436,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:50,285 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:50,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:50,285 INFO L82 PathProgramCache]: Analyzing trace with hash -928129974, now seen corresponding path program 57 times [2021-05-03 14:03:50,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:50,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329713383] [2021-05-03 14:03:50,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:50,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:50,325 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:50,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329713383] [2021-05-03 14:03:50,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815842531] [2021-05-03 14:03:50,325 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 [2021-05-03 14:03:50,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:03:50,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:50,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:50,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:03:50,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:50,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:03:50,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267555070] [2021-05-03 14:03:50,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:03:50,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:50,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:03:50,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:03:50,508 INFO L87 Difference]: Start difference. First operand 1190 states and 3585 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) [2021-05-03 14:03:50,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:50,628 INFO L93 Difference]: Finished difference Result 1540 states and 4536 transitions. [2021-05-03 14:03:50,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:03:50,628 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 18 [2021-05-03 14:03:50,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:50,631 INFO L225 Difference]: With dead ends: 1540 [2021-05-03 14:03:50,631 INFO L226 Difference]: Without dead ends: 1536 [2021-05-03 14:03:50,631 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:03:50,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-05-03 14:03:50,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1457. [2021-05-03 14:03:50,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1456 states have (on average 3.0494505494505493) internal successors, (4440), 1456 states have internal predecessors, (4440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:50,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 4440 transitions. [2021-05-03 14:03:50,665 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 4440 transitions. Word has length 18 [2021-05-03 14:03:50,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:50,665 INFO L480 AbstractCegarLoop]: Abstraction has 1457 states and 4440 transitions. [2021-05-03 14:03:50,665 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) [2021-05-03 14:03:50,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 4440 transitions. [2021-05-03 14:03:50,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:50,676 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:50,676 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:50,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-05-03 14:03:50,885 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:50,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:50,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1482288330, now seen corresponding path program 58 times [2021-05-03 14:03:50,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:50,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659245280] [2021-05-03 14:03:50,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:50,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:50,980 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:50,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659245280] [2021-05-03 14:03:50,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434548910] [2021-05-03 14:03:50,981 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) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:51,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:03:51,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:51,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:51,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:51,093 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:51,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:51,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:03:51,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55993757] [2021-05-03 14:03:51,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:03:51,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:51,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:03:51,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:03:51,094 INFO L87 Difference]: Start difference. First operand 1457 states and 4440 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-05-03 14:03:51,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:51,185 INFO L93 Difference]: Finished difference Result 1886 states and 5530 transitions. [2021-05-03 14:03:51,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:03:51,185 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 18 [2021-05-03 14:03:51,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:51,190 INFO L225 Difference]: With dead ends: 1886 [2021-05-03 14:03:51,190 INFO L226 Difference]: Without dead ends: 1886 [2021-05-03 14:03:51,190 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:03:51,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1886 states. [2021-05-03 14:03:51,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1886 to 1647. [2021-05-03 14:03:51,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 3.0674362089914946) internal successors, (5049), 1646 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:51,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 5049 transitions. [2021-05-03 14:03:51,228 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 5049 transitions. Word has length 18 [2021-05-03 14:03:51,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:51,229 INFO L480 AbstractCegarLoop]: Abstraction has 1647 states and 5049 transitions. [2021-05-03 14:03:51,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-05-03 14:03:51,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 5049 transitions. [2021-05-03 14:03:51,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:51,231 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:51,231 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:51,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:51,444 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:51,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:51,444 INFO L82 PathProgramCache]: Analyzing trace with hash 975942064, now seen corresponding path program 59 times [2021-05-03 14:03:51,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:51,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293597603] [2021-05-03 14:03:51,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:51,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:51,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293597603] [2021-05-03 14:03:51,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57732656] [2021-05-03 14:03:51,590 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 [2021-05-03 14:03:51,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:03:51,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:51,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:51,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:51,650 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:51,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:51,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:03:51,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121430285] [2021-05-03 14:03:51,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:03:51,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:51,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:03:51,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:03:51,651 INFO L87 Difference]: Start difference. First operand 1647 states and 5049 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) [2021-05-03 14:03:51,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:51,756 INFO L93 Difference]: Finished difference Result 2131 states and 6281 transitions. [2021-05-03 14:03:51,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:03:51,756 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 18 [2021-05-03 14:03:51,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:51,760 INFO L225 Difference]: With dead ends: 2131 [2021-05-03 14:03:51,760 INFO L226 Difference]: Without dead ends: 2131 [2021-05-03 14:03:51,768 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 159.9ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:03:51,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2021-05-03 14:03:51,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 1134. [2021-05-03 14:03:51,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1133 states have (on average 3.0123565754633717) internal successors, (3413), 1133 states have internal predecessors, (3413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:51,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 3413 transitions. [2021-05-03 14:03:51,794 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 3413 transitions. Word has length 18 [2021-05-03 14:03:51,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:51,795 INFO L480 AbstractCegarLoop]: Abstraction has 1134 states and 3413 transitions. [2021-05-03 14:03:51,795 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) [2021-05-03 14:03:51,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 3413 transitions. [2021-05-03 14:03:51,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:51,797 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:51,797 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:52,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable439 [2021-05-03 14:03:52,015 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:52,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:52,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1513797642, now seen corresponding path program 60 times [2021-05-03 14:03:52,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:52,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605882172] [2021-05-03 14:03:52,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:52,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:52,090 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:52,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605882172] [2021-05-03 14:03:52,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451848081] [2021-05-03 14:03:52,090 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) [2021-05-03 14:03:52,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:03:52,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:52,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:52,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:52,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:52,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:03:52,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626331234] [2021-05-03 14:03:52,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:03:52,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:52,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:03:52,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:03:52,271 INFO L87 Difference]: Start difference. First operand 1134 states and 3413 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) [2021-05-03 14:03:52,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:52,432 INFO L93 Difference]: Finished difference Result 1469 states and 4201 transitions. [2021-05-03 14:03:52,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:03:52,439 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 18 [2021-05-03 14:03:52,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:52,442 INFO L225 Difference]: With dead ends: 1469 [2021-05-03 14:03:52,442 INFO L226 Difference]: Without dead ends: 1469 [2021-05-03 14:03:52,443 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 142.5ms TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:03:52,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2021-05-03 14:03:52,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1145. [2021-05-03 14:03:52,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1144 states have (on average 3.015734265734266) internal successors, (3450), 1144 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:52,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 3450 transitions. [2021-05-03 14:03:52,465 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 3450 transitions. Word has length 18 [2021-05-03 14:03:52,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:52,465 INFO L480 AbstractCegarLoop]: Abstraction has 1145 states and 3450 transitions. [2021-05-03 14:03:52,465 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) [2021-05-03 14:03:52,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 3450 transitions. [2021-05-03 14:03:52,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:52,467 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:52,467 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:52,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:52,688 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:52,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:52,688 INFO L82 PathProgramCache]: Analyzing trace with hash 236267782, now seen corresponding path program 61 times [2021-05-03 14:03:52,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:52,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238233510] [2021-05-03 14:03:52,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:52,795 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:52,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238233510] [2021-05-03 14:03:52,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564275389] [2021-05-03 14:03:52,797 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 [2021-05-03 14:03:52,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:52,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:52,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:52,950 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:52,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:52,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:03:52,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377578159] [2021-05-03 14:03:52,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:03:52,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:52,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:03:52,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:03:52,951 INFO L87 Difference]: Start difference. First operand 1145 states and 3450 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) [2021-05-03 14:03:53,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:53,104 INFO L93 Difference]: Finished difference Result 1280 states and 3655 transitions. [2021-05-03 14:03:53,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:03:53,104 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 18 [2021-05-03 14:03:53,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:53,107 INFO L225 Difference]: With dead ends: 1280 [2021-05-03 14:03:53,107 INFO L226 Difference]: Without dead ends: 1276 [2021-05-03 14:03:53,108 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 155.9ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:03:53,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-05-03 14:03:53,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1116. [2021-05-03 14:03:53,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 3.0053811659192826) internal successors, (3351), 1115 states have internal predecessors, (3351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:53,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 3351 transitions. [2021-05-03 14:03:53,126 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 3351 transitions. Word has length 18 [2021-05-03 14:03:53,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:53,126 INFO L480 AbstractCegarLoop]: Abstraction has 1116 states and 3351 transitions. [2021-05-03 14:03:53,127 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) [2021-05-03 14:03:53,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 3351 transitions. [2021-05-03 14:03:53,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:53,128 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:53,128 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:53,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-05-03 14:03:53,346 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:53,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:53,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1954016842, now seen corresponding path program 62 times [2021-05-03 14:03:53,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:53,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208216013] [2021-05-03 14:03:53,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:53,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:53,391 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:53,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208216013] [2021-05-03 14:03:53,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434681223] [2021-05-03 14:03:53,392 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 [2021-05-03 14:03:53,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:03:53,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:53,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:53,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:53,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:53,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:03:53,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640841840] [2021-05-03 14:03:53,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:03:53,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:53,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:03:53,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:03:53,475 INFO L87 Difference]: Start difference. First operand 1116 states and 3351 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) [2021-05-03 14:03:53,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:53,527 INFO L93 Difference]: Finished difference Result 1248 states and 3538 transitions. [2021-05-03 14:03:53,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:03:53,527 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 18 [2021-05-03 14:03:53,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:53,530 INFO L225 Difference]: With dead ends: 1248 [2021-05-03 14:03:53,530 INFO L226 Difference]: Without dead ends: 1248 [2021-05-03 14:03:53,530 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:03:53,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-05-03 14:03:53,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1114. [2021-05-03 14:03:53,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 3.0017969451931714) internal successors, (3341), 1113 states have internal predecessors, (3341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:53,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 3341 transitions. [2021-05-03 14:03:53,548 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 3341 transitions. Word has length 18 [2021-05-03 14:03:53,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:53,548 INFO L480 AbstractCegarLoop]: Abstraction has 1114 states and 3341 transitions. [2021-05-03 14:03:53,548 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) [2021-05-03 14:03:53,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 3341 transitions. [2021-05-03 14:03:53,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:53,550 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:53,550 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:53,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable442,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:53,768 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:53,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:53,769 INFO L82 PathProgramCache]: Analyzing trace with hash 224969508, now seen corresponding path program 63 times [2021-05-03 14:03:53,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:53,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403134607] [2021-05-03 14:03:53,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:53,842 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:53,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403134607] [2021-05-03 14:03:53,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476257417] [2021-05-03 14:03:53,843 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 [2021-05-03 14:03:53,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:03:53,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:53,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:53,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:53,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:53,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:03:53,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623140339] [2021-05-03 14:03:53,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:03:53,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:53,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:03:53,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:03:53,913 INFO L87 Difference]: Start difference. First operand 1114 states and 3341 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) [2021-05-03 14:03:53,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:53,971 INFO L93 Difference]: Finished difference Result 1212 states and 3446 transitions. [2021-05-03 14:03:53,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:03:53,971 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 18 [2021-05-03 14:03:53,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:53,979 INFO L225 Difference]: With dead ends: 1212 [2021-05-03 14:03:53,979 INFO L226 Difference]: Without dead ends: 1212 [2021-05-03 14:03:53,979 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:03:53,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-05-03 14:03:53,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 1096. [2021-05-03 14:03:53,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 2.992694063926941) internal successors, (3277), 1095 states have internal predecessors, (3277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:53,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 3277 transitions. [2021-05-03 14:03:54,000 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 3277 transitions. Word has length 18 [2021-05-03 14:03:54,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:54,000 INFO L480 AbstractCegarLoop]: Abstraction has 1096 states and 3277 transitions. [2021-05-03 14:03:54,000 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) [2021-05-03 14:03:54,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 3277 transitions. [2021-05-03 14:03:54,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:54,007 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:54,007 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:54,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-05-03 14:03:54,207 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:54,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:54,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1835890294, now seen corresponding path program 64 times [2021-05-03 14:03:54,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:54,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249080477] [2021-05-03 14:03:54,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:54,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:54,306 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:54,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249080477] [2021-05-03 14:03:54,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729285375] [2021-05-03 14:03:54,307 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:03:54,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:03:54,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:54,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:54,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:54,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:54,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:03:54,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676975052] [2021-05-03 14:03:54,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:03:54,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:54,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:03:54,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:03:54,423 INFO L87 Difference]: Start difference. First operand 1096 states and 3277 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-05-03 14:03:54,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:54,531 INFO L93 Difference]: Finished difference Result 1269 states and 3581 transitions. [2021-05-03 14:03:54,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:03:54,545 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-05-03 14:03:54,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:54,547 INFO L225 Difference]: With dead ends: 1269 [2021-05-03 14:03:54,547 INFO L226 Difference]: Without dead ends: 1269 [2021-05-03 14:03:54,547 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 135.7ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:03:54,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-05-03 14:03:54,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1069. [2021-05-03 14:03:54,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 2.985955056179775) internal successors, (3189), 1068 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:54,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 3189 transitions. [2021-05-03 14:03:54,560 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 3189 transitions. Word has length 18 [2021-05-03 14:03:54,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:54,560 INFO L480 AbstractCegarLoop]: Abstraction has 1069 states and 3189 transitions. [2021-05-03 14:03:54,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-05-03 14:03:54,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 3189 transitions. [2021-05-03 14:03:54,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:54,570 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:54,570 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:54,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-05-03 14:03:54,786 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:54,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:54,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1298034716, now seen corresponding path program 65 times [2021-05-03 14:03:54,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:54,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708996015] [2021-05-03 14:03:54,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:54,843 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:54,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708996015] [2021-05-03 14:03:54,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146174347] [2021-05-03 14:03:54,843 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) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:54,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:03:54,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:54,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:54,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:54,937 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:54,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:54,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:03:54,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745056320] [2021-05-03 14:03:54,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:03:54,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:54,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:03:54,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:03:54,938 INFO L87 Difference]: Start difference. First operand 1069 states and 3189 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-05-03 14:03:55,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:55,024 INFO L93 Difference]: Finished difference Result 1385 states and 3940 transitions. [2021-05-03 14:03:55,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:03:55,025 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-05-03 14:03:55,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:55,027 INFO L225 Difference]: With dead ends: 1385 [2021-05-03 14:03:55,027 INFO L226 Difference]: Without dead ends: 1385 [2021-05-03 14:03:55,027 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:03:55,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2021-05-03 14:03:55,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1117. [2021-05-03 14:03:55,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 2.9946236559139785) internal successors, (3342), 1116 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:55,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 3342 transitions. [2021-05-03 14:03:55,040 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 3342 transitions. Word has length 18 [2021-05-03 14:03:55,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:55,040 INFO L480 AbstractCegarLoop]: Abstraction has 1117 states and 3342 transitions. [2021-05-03 14:03:55,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-05-03 14:03:55,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 3342 transitions. [2021-05-03 14:03:55,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:55,041 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:55,041 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:55,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-05-03 14:03:55,256 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:55,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:55,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1804380982, now seen corresponding path program 66 times [2021-05-03 14:03:55,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:55,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235640113] [2021-05-03 14:03:55,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:55,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:55,328 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:55,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235640113] [2021-05-03 14:03:55,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476235555] [2021-05-03 14:03:55,328 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 [2021-05-03 14:03:55,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:03:55,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:55,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:55,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:55,388 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:55,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:55,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:03:55,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762868527] [2021-05-03 14:03:55,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:03:55,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:55,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:03:55,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:03:55,389 INFO L87 Difference]: Start difference. First operand 1117 states and 3342 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-05-03 14:03:55,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:55,613 INFO L93 Difference]: Finished difference Result 1491 states and 4244 transitions. [2021-05-03 14:03:55,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:03:55,613 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-05-03 14:03:55,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:55,616 INFO L225 Difference]: With dead ends: 1491 [2021-05-03 14:03:55,617 INFO L226 Difference]: Without dead ends: 1491 [2021-05-03 14:03:55,617 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 144.7ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:03:55,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2021-05-03 14:03:55,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1299. [2021-05-03 14:03:55,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 3.010785824345146) internal successors, (3908), 1298 states have internal predecessors, (3908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:55,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3908 transitions. [2021-05-03 14:03:55,638 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3908 transitions. Word has length 18 [2021-05-03 14:03:55,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:55,638 INFO L480 AbstractCegarLoop]: Abstraction has 1299 states and 3908 transitions. [2021-05-03 14:03:55,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-05-03 14:03:55,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3908 transitions. [2021-05-03 14:03:55,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:55,670 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:55,670 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:55,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:55,887 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:55,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:55,888 INFO L82 PathProgramCache]: Analyzing trace with hash -357725678, now seen corresponding path program 67 times [2021-05-03 14:03:55,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:55,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938449490] [2021-05-03 14:03:55,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:55,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:55,962 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:55,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938449490] [2021-05-03 14:03:55,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160127623] [2021-05-03 14:03:55,962 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 [2021-05-03 14:03:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:56,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:56,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:56,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:56,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:03:56,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979413052] [2021-05-03 14:03:56,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:03:56,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:56,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:03:56,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:03:56,066 INFO L87 Difference]: Start difference. First operand 1299 states and 3908 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-05-03 14:03:56,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:56,217 INFO L93 Difference]: Finished difference Result 1466 states and 4238 transitions. [2021-05-03 14:03:56,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:03:56,217 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 18 [2021-05-03 14:03:56,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:56,219 INFO L225 Difference]: With dead ends: 1466 [2021-05-03 14:03:56,219 INFO L226 Difference]: Without dead ends: 1462 [2021-05-03 14:03:56,219 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:03:56,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2021-05-03 14:03:56,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1236. [2021-05-03 14:03:56,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 3.0) internal successors, (3705), 1235 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:56,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 3705 transitions. [2021-05-03 14:03:56,245 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 3705 transitions. Word has length 18 [2021-05-03 14:03:56,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:56,245 INFO L480 AbstractCegarLoop]: Abstraction has 1236 states and 3705 transitions. [2021-05-03 14:03:56,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-05-03 14:03:56,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 3705 transitions. [2021-05-03 14:03:56,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:56,247 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:56,247 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:56,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-05-03 14:03:56,466 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:56,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:56,467 INFO L82 PathProgramCache]: Analyzing trace with hash 2084201938, now seen corresponding path program 68 times [2021-05-03 14:03:56,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:56,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795963728] [2021-05-03 14:03:56,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:56,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795963728] [2021-05-03 14:03:56,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964204009] [2021-05-03 14:03:56,515 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 [2021-05-03 14:03:56,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:03:56,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:56,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:56,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:56,581 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:56,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:56,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:03:56,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637515486] [2021-05-03 14:03:56,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:03:56,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:56,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:03:56,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:03:56,582 INFO L87 Difference]: Start difference. First operand 1236 states and 3705 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) [2021-05-03 14:03:56,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:56,698 INFO L93 Difference]: Finished difference Result 1717 states and 4942 transitions. [2021-05-03 14:03:56,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:03:56,698 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 18 [2021-05-03 14:03:56,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:56,702 INFO L225 Difference]: With dead ends: 1717 [2021-05-03 14:03:56,703 INFO L226 Difference]: Without dead ends: 1717 [2021-05-03 14:03:56,703 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:03:56,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2021-05-03 14:03:56,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1445. [2021-05-03 14:03:56,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 3.020083102493075) internal successors, (4361), 1444 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:56,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 4361 transitions. [2021-05-03 14:03:56,728 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 4361 transitions. Word has length 18 [2021-05-03 14:03:56,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:56,728 INFO L480 AbstractCegarLoop]: Abstraction has 1445 states and 4361 transitions. [2021-05-03 14:03:56,728 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) [2021-05-03 14:03:56,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 4361 transitions. [2021-05-03 14:03:56,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:56,730 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:56,730 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:56,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-05-03 14:03:56,949 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:56,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:56,949 INFO L82 PathProgramCache]: Analyzing trace with hash -727630420, now seen corresponding path program 69 times [2021-05-03 14:03:56,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:56,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632991375] [2021-05-03 14:03:56,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:56,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:57,024 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:57,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632991375] [2021-05-03 14:03:57,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767202619] [2021-05-03 14:03:57,024 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 [2021-05-03 14:03:57,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:03:57,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:57,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:57,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:57,259 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:57,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:57,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:03:57,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200300723] [2021-05-03 14:03:57,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:03:57,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:57,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:03:57,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:03:57,260 INFO L87 Difference]: Start difference. First operand 1445 states and 4361 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-05-03 14:03:57,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:57,382 INFO L93 Difference]: Finished difference Result 1815 states and 5279 transitions. [2021-05-03 14:03:57,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:03:57,382 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-05-03 14:03:57,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:57,385 INFO L225 Difference]: With dead ends: 1815 [2021-05-03 14:03:57,385 INFO L226 Difference]: Without dead ends: 1815 [2021-05-03 14:03:57,386 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:03:57,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2021-05-03 14:03:57,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1189. [2021-05-03 14:03:57,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 2.9974747474747474) internal successors, (3561), 1188 states have internal predecessors, (3561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:57,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3561 transitions. [2021-05-03 14:03:57,422 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3561 transitions. Word has length 18 [2021-05-03 14:03:57,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:57,423 INFO L480 AbstractCegarLoop]: Abstraction has 1189 states and 3561 transitions. [2021-05-03 14:03:57,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-05-03 14:03:57,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3561 transitions. [2021-05-03 14:03:57,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:57,424 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:57,424 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:57,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-05-03 14:03:57,643 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:57,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:57,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1233976686, now seen corresponding path program 70 times [2021-05-03 14:03:57,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:57,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897783237] [2021-05-03 14:03:57,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:57,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:57,709 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:57,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897783237] [2021-05-03 14:03:57,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993587240] [2021-05-03 14:03:57,710 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 [2021-05-03 14:03:57,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:03:57,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:57,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:57,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:57,814 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:57,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:57,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:03:57,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245704541] [2021-05-03 14:03:57,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:03:57,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:57,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:03:57,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:03:57,815 INFO L87 Difference]: Start difference. First operand 1189 states and 3561 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-05-03 14:03:58,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:58,207 INFO L93 Difference]: Finished difference Result 1539 states and 4366 transitions. [2021-05-03 14:03:58,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:03:58,208 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-05-03 14:03:58,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:58,211 INFO L225 Difference]: With dead ends: 1539 [2021-05-03 14:03:58,211 INFO L226 Difference]: Without dead ends: 1539 [2021-05-03 14:03:58,211 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 310.7ms TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:03:58,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2021-05-03 14:03:58,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1195. [2021-05-03 14:03:58,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 1194 states have (on average 2.9983249581239533) internal successors, (3580), 1194 states have internal predecessors, (3580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:58,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 3580 transitions. [2021-05-03 14:03:58,230 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 3580 transitions. Word has length 18 [2021-05-03 14:03:58,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:58,230 INFO L480 AbstractCegarLoop]: Abstraction has 1195 states and 3580 transitions. [2021-05-03 14:03:58,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-05-03 14:03:58,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 3580 transitions. [2021-05-03 14:03:58,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:58,232 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:58,232 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:58,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:58,445 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:58,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:58,445 INFO L82 PathProgramCache]: Analyzing trace with hash -460785100, now seen corresponding path program 71 times [2021-05-03 14:03:58,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:58,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975909975] [2021-05-03 14:03:58,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:58,517 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:58,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975909975] [2021-05-03 14:03:58,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442841963] [2021-05-03 14:03:58,517 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 [2021-05-03 14:03:58,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:03:58,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:58,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:58,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:58,570 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:58,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:58,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:03:58,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880604106] [2021-05-03 14:03:58,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:03:58,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:58,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:03:58,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:03:58,571 INFO L87 Difference]: Start difference. First operand 1195 states and 3580 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) [2021-05-03 14:03:58,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:58,675 INFO L93 Difference]: Finished difference Result 1319 states and 3767 transitions. [2021-05-03 14:03:58,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:03:58,676 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 18 [2021-05-03 14:03:58,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:58,678 INFO L225 Difference]: With dead ends: 1319 [2021-05-03 14:03:58,678 INFO L226 Difference]: Without dead ends: 1315 [2021-05-03 14:03:58,679 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:03:58,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2021-05-03 14:03:58,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1219. [2021-05-03 14:03:58,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 3.0) internal successors, (3654), 1218 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:58,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 3654 transitions. [2021-05-03 14:03:58,698 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 3654 transitions. Word has length 18 [2021-05-03 14:03:58,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:58,698 INFO L480 AbstractCegarLoop]: Abstraction has 1219 states and 3654 transitions. [2021-05-03 14:03:58,698 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) [2021-05-03 14:03:58,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 3654 transitions. [2021-05-03 14:03:58,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:58,700 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:58,700 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:58,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:58,913 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:58,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:58,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1256963960, now seen corresponding path program 72 times [2021-05-03 14:03:58,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:58,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111909244] [2021-05-03 14:03:58,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:58,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:58,969 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:58,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111909244] [2021-05-03 14:03:58,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654566031] [2021-05-03 14:03:58,969 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 [2021-05-03 14:03:58,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:03:58,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:58,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:58,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:59,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:59,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:03:59,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922839954] [2021-05-03 14:03:59,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:03:59,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:59,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:03:59,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:03:59,024 INFO L87 Difference]: Start difference. First operand 1219 states and 3654 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) [2021-05-03 14:03:59,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:59,084 INFO L93 Difference]: Finished difference Result 1350 states and 3852 transitions. [2021-05-03 14:03:59,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:03:59,085 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 18 [2021-05-03 14:03:59,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:59,087 INFO L225 Difference]: With dead ends: 1350 [2021-05-03 14:03:59,087 INFO L226 Difference]: Without dead ends: 1350 [2021-05-03 14:03:59,087 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:03:59,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-05-03 14:03:59,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1220. [2021-05-03 14:03:59,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 1219 states have (on average 3.0) internal successors, (3657), 1219 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:59,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 3657 transitions. [2021-05-03 14:03:59,105 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 3657 transitions. Word has length 18 [2021-05-03 14:03:59,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:59,106 INFO L480 AbstractCegarLoop]: Abstraction has 1220 states and 3657 transitions. [2021-05-03 14:03:59,106 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) [2021-05-03 14:03:59,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 3657 transitions. [2021-05-03 14:03:59,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:59,108 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:59,108 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:59,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:59,317 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:59,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:59,317 INFO L82 PathProgramCache]: Analyzing trace with hash -472083374, now seen corresponding path program 73 times [2021-05-03 14:03:59,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:59,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710837774] [2021-05-03 14:03:59,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:59,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710837774] [2021-05-03 14:03:59,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244654499] [2021-05-03 14:03:59,393 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) [2021-05-03 14:03:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:59,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:59,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:59,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:59,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:03:59,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987942371] [2021-05-03 14:03:59,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:03:59,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:59,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:03:59,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:03:59,485 INFO L87 Difference]: Start difference. First operand 1220 states and 3657 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) [2021-05-03 14:03:59,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:59,553 INFO L93 Difference]: Finished difference Result 1356 states and 3865 transitions. [2021-05-03 14:03:59,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:03:59,553 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 18 [2021-05-03 14:03:59,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:59,556 INFO L225 Difference]: With dead ends: 1356 [2021-05-03 14:03:59,556 INFO L226 Difference]: Without dead ends: 1356 [2021-05-03 14:03:59,556 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:03:59,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-05-03 14:03:59,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1215. [2021-05-03 14:03:59,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 2.9975288303130148) internal successors, (3639), 1214 states have internal predecessors, (3639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:59,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 3639 transitions. [2021-05-03 14:03:59,572 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 3639 transitions. Word has length 18 [2021-05-03 14:03:59,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:59,572 INFO L480 AbstractCegarLoop]: Abstraction has 1215 states and 3639 transitions. [2021-05-03 14:03:59,572 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) [2021-05-03 14:03:59,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 3639 transitions. [2021-05-03 14:03:59,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:03:59,573 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:59,573 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:59,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-05-03 14:03:59,791 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:59,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:59,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1762024120, now seen corresponding path program 74 times [2021-05-03 14:03:59,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:59,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594442172] [2021-05-03 14:03:59,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:59,842 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:59,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594442172] [2021-05-03 14:03:59,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562830412] [2021-05-03 14:03:59,842 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 [2021-05-03 14:03:59,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:03:59,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:59,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:03:59,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:59,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:59,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:03:59,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577328638] [2021-05-03 14:03:59,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:03:59,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:59,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:03:59,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:03:59,972 INFO L87 Difference]: Start difference. First operand 1215 states and 3639 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) [2021-05-03 14:04:00,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:00,029 INFO L93 Difference]: Finished difference Result 1623 states and 4723 transitions. [2021-05-03 14:04:00,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:04:00,029 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 18 [2021-05-03 14:04:00,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:00,031 INFO L225 Difference]: With dead ends: 1623 [2021-05-03 14:04:00,031 INFO L226 Difference]: Without dead ends: 1623 [2021-05-03 14:04:00,031 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:04:00,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2021-05-03 14:04:00,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1529. [2021-05-03 14:04:00,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.017670157068063) internal successors, (4611), 1528 states have internal predecessors, (4611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:00,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 4611 transitions. [2021-05-03 14:04:00,047 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 4611 transitions. Word has length 18 [2021-05-03 14:04:00,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:00,047 INFO L480 AbstractCegarLoop]: Abstraction has 1529 states and 4611 transitions. [2021-05-03 14:04:00,048 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) [2021-05-03 14:04:00,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 4611 transitions. [2021-05-03 14:04:00,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:04:00,049 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:00,049 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:00,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-05-03 14:04:00,257 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:00,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:00,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1995087598, now seen corresponding path program 75 times [2021-05-03 14:04:00,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:00,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389800651] [2021-05-03 14:04:00,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:00,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389800651] [2021-05-03 14:04:00,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566157016] [2021-05-03 14:04:00,338 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) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:00,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:04:00,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:00,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:00,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:00,409 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:00,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:00,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:04:00,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958639394] [2021-05-03 14:04:00,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:00,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:00,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:00,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:00,410 INFO L87 Difference]: Start difference. First operand 1529 states and 4611 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-05-03 14:04:00,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:00,505 INFO L93 Difference]: Finished difference Result 1693 states and 4893 transitions. [2021-05-03 14:04:00,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:04:00,505 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-05-03 14:04:00,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:00,507 INFO L225 Difference]: With dead ends: 1693 [2021-05-03 14:04:00,507 INFO L226 Difference]: Without dead ends: 1693 [2021-05-03 14:04:00,507 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:04:00,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2021-05-03 14:04:00,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1537. [2021-05-03 14:04:00,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 3.017578125) internal successors, (4635), 1536 states have internal predecessors, (4635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:00,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 4635 transitions. [2021-05-03 14:04:00,525 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 4635 transitions. Word has length 18 [2021-05-03 14:04:00,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:00,525 INFO L480 AbstractCegarLoop]: Abstraction has 1537 states and 4635 transitions. [2021-05-03 14:04:00,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-05-03 14:04:00,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 4635 transitions. [2021-05-03 14:04:00,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:04:00,526 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:00,526 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:00,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-05-03 14:04:00,733 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:00,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:00,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1793533432, now seen corresponding path program 76 times [2021-05-03 14:04:00,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:00,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153699158] [2021-05-03 14:04:00,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:00,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:00,781 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:00,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153699158] [2021-05-03 14:04:00,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845619641] [2021-05-03 14:04:00,782 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 [2021-05-03 14:04:00,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:00,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:00,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:00,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:00,832 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:00,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:00,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:04:00,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071612753] [2021-05-03 14:04:00,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:00,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:00,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:00,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:00,833 INFO L87 Difference]: Start difference. First operand 1537 states and 4635 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-05-03 14:04:00,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:00,974 INFO L93 Difference]: Finished difference Result 1777 states and 5185 transitions. [2021-05-03 14:04:00,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:04:00,974 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-05-03 14:04:00,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:00,977 INFO L225 Difference]: With dead ends: 1777 [2021-05-03 14:04:00,978 INFO L226 Difference]: Without dead ends: 1777 [2021-05-03 14:04:00,978 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 124.2ms TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:04:00,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-05-03 14:04:00,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1651. [2021-05-03 14:04:00,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.0187878787878786) internal successors, (4981), 1650 states have internal predecessors, (4981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:01,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 4981 transitions. [2021-05-03 14:04:01,004 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 4981 transitions. Word has length 18 [2021-05-03 14:04:01,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:01,004 INFO L480 AbstractCegarLoop]: Abstraction has 1651 states and 4981 transitions. [2021-05-03 14:04:01,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-05-03 14:04:01,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 4981 transitions. [2021-05-03 14:04:01,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:04:01,006 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:01,006 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:01,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-05-03 14:04:01,221 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:01,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:01,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1018298926, now seen corresponding path program 77 times [2021-05-03 14:04:01,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:01,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95891346] [2021-05-03 14:04:01,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:01,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:01,304 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:01,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95891346] [2021-05-03 14:04:01,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468670173] [2021-05-03 14:04:01,305 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 [2021-05-03 14:04:01,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:04:01,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:01,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:01,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:01,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:01,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:04:01,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175884907] [2021-05-03 14:04:01,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:01,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:01,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:01,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:01,367 INFO L87 Difference]: Start difference. First operand 1651 states and 4981 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-05-03 14:04:01,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:01,595 INFO L93 Difference]: Finished difference Result 1973 states and 5717 transitions. [2021-05-03 14:04:01,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:04:01,596 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-05-03 14:04:01,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:01,598 INFO L225 Difference]: With dead ends: 1973 [2021-05-03 14:04:01,599 INFO L226 Difference]: Without dead ends: 1973 [2021-05-03 14:04:01,599 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 178.8ms TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:04:01,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2021-05-03 14:04:01,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 1718. [2021-05-03 14:04:01,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1717 states have (on average 3.018054746651136) internal successors, (5182), 1717 states have internal predecessors, (5182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:01,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 5182 transitions. [2021-05-03 14:04:01,624 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 5182 transitions. Word has length 18 [2021-05-03 14:04:01,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:01,624 INFO L480 AbstractCegarLoop]: Abstraction has 1718 states and 5182 transitions. [2021-05-03 14:04:01,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-05-03 14:04:01,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 5182 transitions. [2021-05-03 14:04:01,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:04:01,627 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:01,627 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:01,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-05-03 14:04:01,828 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:01,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:01,828 INFO L82 PathProgramCache]: Analyzing trace with hash 144938314, now seen corresponding path program 78 times [2021-05-03 14:04:01,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:01,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274649805] [2021-05-03 14:04:01,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:01,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:01,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274649805] [2021-05-03 14:04:01,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229106092] [2021-05-03 14:04:01,977 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 [2021-05-03 14:04:02,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:04:02,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:02,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:02,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:02,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:02,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-05-03 14:04:02,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700420325] [2021-05-03 14:04:02,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:02,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:02,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:02,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:02,086 INFO L87 Difference]: Start difference. First operand 1718 states and 5182 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) [2021-05-03 14:04:02,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:02,260 INFO L93 Difference]: Finished difference Result 1834 states and 5328 transitions. [2021-05-03 14:04:02,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:04:02,260 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 18 [2021-05-03 14:04:02,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:02,263 INFO L225 Difference]: With dead ends: 1834 [2021-05-03 14:04:02,263 INFO L226 Difference]: Without dead ends: 1830 [2021-05-03 14:04:02,264 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 181.5ms TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:04:02,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2021-05-03 14:04:02,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1663. [2021-05-03 14:04:02,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 3.0138387484957883) internal successors, (5009), 1662 states have internal predecessors, (5009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:02,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 5009 transitions. [2021-05-03 14:04:02,290 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 5009 transitions. Word has length 18 [2021-05-03 14:04:02,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:02,290 INFO L480 AbstractCegarLoop]: Abstraction has 1663 states and 5009 transitions. [2021-05-03 14:04:02,290 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) [2021-05-03 14:04:02,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 5009 transitions. [2021-05-03 14:04:02,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:04:02,293 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:02,293 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:02,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable458,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:02,510 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:02,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:02,511 INFO L82 PathProgramCache]: Analyzing trace with hash -731312694, now seen corresponding path program 79 times [2021-05-03 14:04:02,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:02,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460438501] [2021-05-03 14:04:02,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:02,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:02,574 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:02,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460438501] [2021-05-03 14:04:02,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605642951] [2021-05-03 14:04:02,574 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 [2021-05-03 14:04:02,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:02,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:02,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:02,643 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:02,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:02,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-05-03 14:04:02,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513406539] [2021-05-03 14:04:02,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:04:02,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:02,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:04:02,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:02,644 INFO L87 Difference]: Start difference. First operand 1663 states and 5009 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) [2021-05-03 14:04:02,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:02,965 INFO L93 Difference]: Finished difference Result 2513 states and 7307 transitions. [2021-05-03 14:04:02,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:04:02,965 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 18 [2021-05-03 14:04:02,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:02,969 INFO L225 Difference]: With dead ends: 2513 [2021-05-03 14:04:02,969 INFO L226 Difference]: Without dead ends: 2513 [2021-05-03 14:04:02,969 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 235.8ms TimeCoverageRelationStatistics Valid=375, Invalid=747, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 14:04:02,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2021-05-03 14:04:03,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 1818. [2021-05-03 14:04:03,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.0181618051733627) internal successors, (5484), 1817 states have internal predecessors, (5484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:03,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 5484 transitions. [2021-05-03 14:04:03,048 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 5484 transitions. Word has length 18 [2021-05-03 14:04:03,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:03,048 INFO L480 AbstractCegarLoop]: Abstraction has 1818 states and 5484 transitions. [2021-05-03 14:04:03,048 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) [2021-05-03 14:04:03,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 5484 transitions. [2021-05-03 14:04:03,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:04:03,051 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:03,051 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:03,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-05-03 14:04:03,269 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:03,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:03,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1998769872, now seen corresponding path program 80 times [2021-05-03 14:04:03,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:03,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062414164] [2021-05-03 14:04:03,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:03,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:03,394 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:03,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062414164] [2021-05-03 14:04:03,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545487569] [2021-05-03 14:04:03,394 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 [2021-05-03 14:04:03,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:03,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:03,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:03,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:03,462 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:03,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:03,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-05-03 14:04:03,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067563563] [2021-05-03 14:04:03,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:04:03,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:03,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:04:03,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:03,463 INFO L87 Difference]: Start difference. First operand 1818 states and 5484 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) [2021-05-03 14:04:03,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:03,710 INFO L93 Difference]: Finished difference Result 2122 states and 6163 transitions. [2021-05-03 14:04:03,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:04:03,710 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 18 [2021-05-03 14:04:03,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:03,713 INFO L225 Difference]: With dead ends: 2122 [2021-05-03 14:04:03,713 INFO L226 Difference]: Without dead ends: 2122 [2021-05-03 14:04:03,714 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 284.8ms TimeCoverageRelationStatistics Valid=331, Invalid=661, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:04:03,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-05-03 14:04:03,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1809. [2021-05-03 14:04:03,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1808 states have (on average 3.019358407079646) internal successors, (5459), 1808 states have internal predecessors, (5459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:03,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 5459 transitions. [2021-05-03 14:04:03,742 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 5459 transitions. Word has length 18 [2021-05-03 14:04:03,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:03,742 INFO L480 AbstractCegarLoop]: Abstraction has 1809 states and 5459 transitions. [2021-05-03 14:04:03,742 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) [2021-05-03 14:04:03,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 5459 transitions. [2021-05-03 14:04:03,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:04:03,745 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:03,745 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:03,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:03,945 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:03,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:03,946 INFO L82 PathProgramCache]: Analyzing trace with hash -515634934, now seen corresponding path program 81 times [2021-05-03 14:04:03,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:03,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846123479] [2021-05-03 14:04:03,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:03,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:04,006 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:04,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846123479] [2021-05-03 14:04:04,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346129851] [2021-05-03 14:04:04,007 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 [2021-05-03 14:04:04,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:04:04,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:04,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:04,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:04,074 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:04,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:04,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-05-03 14:04:04,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329589937] [2021-05-03 14:04:04,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:04:04,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:04,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:04:04,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:04,075 INFO L87 Difference]: Start difference. First operand 1809 states and 5459 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) [2021-05-03 14:04:04,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:04,323 INFO L93 Difference]: Finished difference Result 2135 states and 6194 transitions. [2021-05-03 14:04:04,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:04:04,325 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 18 [2021-05-03 14:04:04,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:04,328 INFO L225 Difference]: With dead ends: 2135 [2021-05-03 14:04:04,328 INFO L226 Difference]: Without dead ends: 2135 [2021-05-03 14:04:04,328 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 212.0ms TimeCoverageRelationStatistics Valid=325, Invalid=667, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:04:04,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2021-05-03 14:04:04,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 1814. [2021-05-03 14:04:04,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.0193050193050195) internal successors, (5474), 1813 states have internal predecessors, (5474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:04,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5474 transitions. [2021-05-03 14:04:04,359 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5474 transitions. Word has length 18 [2021-05-03 14:04:04,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:04,359 INFO L480 AbstractCegarLoop]: Abstraction has 1814 states and 5474 transitions. [2021-05-03 14:04:04,359 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) [2021-05-03 14:04:04,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5474 transitions. [2021-05-03 14:04:04,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:04:04,363 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:04,363 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:04,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:04,579 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:04,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:04,579 INFO L82 PathProgramCache]: Analyzing trace with hash -594587962, now seen corresponding path program 82 times [2021-05-03 14:04:04,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:04,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653716280] [2021-05-03 14:04:04,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:04,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:04,651 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:04,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653716280] [2021-05-03 14:04:04,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365190686] [2021-05-03 14:04:04,652 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 [2021-05-03 14:04:04,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:04,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:04,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:04,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:04,846 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:04,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:04,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-05-03 14:04:04,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87233972] [2021-05-03 14:04:04,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:04,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:04,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:04,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:04,847 INFO L87 Difference]: Start difference. First operand 1814 states and 5474 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) [2021-05-03 14:04:04,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:04,974 INFO L93 Difference]: Finished difference Result 2025 states and 5942 transitions. [2021-05-03 14:04:04,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:04:04,974 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 18 [2021-05-03 14:04:04,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:04,977 INFO L225 Difference]: With dead ends: 2025 [2021-05-03 14:04:04,977 INFO L226 Difference]: Without dead ends: 2023 [2021-05-03 14:04:04,977 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:04:04,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2021-05-03 14:04:04,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 1929. [2021-05-03 14:04:04,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1928 states have (on average 3.0264522821576763) internal successors, (5835), 1928 states have internal predecessors, (5835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:04,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 5835 transitions. [2021-05-03 14:04:04,998 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 5835 transitions. Word has length 18 [2021-05-03 14:04:04,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:04,998 INFO L480 AbstractCegarLoop]: Abstraction has 1929 states and 5835 transitions. [2021-05-03 14:04:04,998 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) [2021-05-03 14:04:04,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 5835 transitions. [2021-05-03 14:04:05,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:04:05,000 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:05,000 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:05,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:05,200 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:05,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:05,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1123161098, now seen corresponding path program 83 times [2021-05-03 14:04:05,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:05,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650006150] [2021-05-03 14:04:05,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:05,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650006150] [2021-05-03 14:04:05,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541258497] [2021-05-03 14:04:05,255 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 [2021-05-03 14:04:05,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:04:05,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:05,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:05,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:05,324 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:05,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:05,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-05-03 14:04:05,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570828053] [2021-05-03 14:04:05,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:05,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:05,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:05,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:05,325 INFO L87 Difference]: Start difference. First operand 1929 states and 5835 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) [2021-05-03 14:04:05,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:05,470 INFO L93 Difference]: Finished difference Result 2077 states and 6079 transitions. [2021-05-03 14:04:05,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:04:05,471 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 18 [2021-05-03 14:04:05,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:05,473 INFO L225 Difference]: With dead ends: 2077 [2021-05-03 14:04:05,473 INFO L226 Difference]: Without dead ends: 2077 [2021-05-03 14:04:05,473 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 104.3ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:04:05,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2021-05-03 14:04:05,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 1931. [2021-05-03 14:04:05,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 3.0264248704663212) internal successors, (5841), 1930 states have internal predecessors, (5841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:05,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5841 transitions. [2021-05-03 14:04:05,492 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5841 transitions. Word has length 18 [2021-05-03 14:04:05,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:05,493 INFO L480 AbstractCegarLoop]: Abstraction has 1931 states and 5841 transitions. [2021-05-03 14:04:05,493 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) [2021-05-03 14:04:05,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5841 transitions. [2021-05-03 14:04:05,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:04:05,495 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:05,495 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:05,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable463 [2021-05-03 14:04:05,709 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:05,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:05,709 INFO L82 PathProgramCache]: Analyzing trace with hash -605886236, now seen corresponding path program 84 times [2021-05-03 14:04:05,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:05,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566585422] [2021-05-03 14:04:05,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:05,768 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:05,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566585422] [2021-05-03 14:04:05,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339381470] [2021-05-03 14:04:05,768 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 [2021-05-03 14:04:05,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:04:05,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:05,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:05,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:05,839 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:05,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:05,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-05-03 14:04:05,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378015931] [2021-05-03 14:04:05,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:04:05,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:05,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:04:05,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:05,840 INFO L87 Difference]: Start difference. First operand 1931 states and 5841 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) [2021-05-03 14:04:05,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:05,994 INFO L93 Difference]: Finished difference Result 2122 states and 6197 transitions. [2021-05-03 14:04:05,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:04:05,994 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 18 [2021-05-03 14:04:05,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:05,997 INFO L225 Difference]: With dead ends: 2122 [2021-05-03 14:04:05,997 INFO L226 Difference]: Without dead ends: 2122 [2021-05-03 14:04:05,997 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:04:05,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-05-03 14:04:06,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1939. [2021-05-03 14:04:06,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 3.026315789473684) internal successors, (5865), 1938 states have internal predecessors, (5865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:06,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 5865 transitions. [2021-05-03 14:04:06,025 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 5865 transitions. Word has length 18 [2021-05-03 14:04:06,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:06,025 INFO L480 AbstractCegarLoop]: Abstraction has 1939 states and 5865 transitions. [2021-05-03 14:04:06,025 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) [2021-05-03 14:04:06,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 5865 transitions. [2021-05-03 14:04:06,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:04:06,028 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:06,028 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:06,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2021-05-03 14:04:06,229 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:06,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:06,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1628221258, now seen corresponding path program 85 times [2021-05-03 14:04:06,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:06,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784450818] [2021-05-03 14:04:06,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:06,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:06,310 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:06,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784450818] [2021-05-03 14:04:06,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230029699] [2021-05-03 14:04:06,311 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 [2021-05-03 14:04:06,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:06,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:06,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:06,385 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:06,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:06,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-05-03 14:04:06,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427713032] [2021-05-03 14:04:06,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:04:06,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:06,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:04:06,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:06,386 INFO L87 Difference]: Start difference. First operand 1939 states and 5865 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) [2021-05-03 14:04:06,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:06,556 INFO L93 Difference]: Finished difference Result 2505 states and 7377 transitions. [2021-05-03 14:04:06,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:04:06,557 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 18 [2021-05-03 14:04:06,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:06,560 INFO L225 Difference]: With dead ends: 2505 [2021-05-03 14:04:06,561 INFO L226 Difference]: Without dead ends: 2505 [2021-05-03 14:04:06,561 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 145.8ms TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:04:06,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2021-05-03 14:04:06,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 2323. [2021-05-03 14:04:06,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2323 states, 2322 states have (on average 3.0353143841515933) internal successors, (7048), 2322 states have internal predecessors, (7048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:06,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2323 states to 2323 states and 7048 transitions. [2021-05-03 14:04:06,603 INFO L78 Accepts]: Start accepts. Automaton has 2323 states and 7048 transitions. Word has length 18 [2021-05-03 14:04:06,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:06,603 INFO L480 AbstractCegarLoop]: Abstraction has 2323 states and 7048 transitions. [2021-05-03 14:04:06,603 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) [2021-05-03 14:04:06,603 INFO L276 IsEmpty]: Start isEmpty. Operand 2323 states and 7048 transitions. [2021-05-03 14:04:06,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:04:06,606 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:06,606 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:06,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2021-05-03 14:04:06,807 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:06,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:06,807 INFO L82 PathProgramCache]: Analyzing trace with hash -2128890460, now seen corresponding path program 86 times [2021-05-03 14:04:06,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:06,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293720470] [2021-05-03 14:04:06,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:06,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:06,895 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:06,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293720470] [2021-05-03 14:04:06,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240484925] [2021-05-03 14:04:06,896 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 [2021-05-03 14:04:06,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:06,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:06,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:06,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:06,966 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:06,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:06,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-05-03 14:04:06,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435793716] [2021-05-03 14:04:06,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:04:06,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:06,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:04:06,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:06,967 INFO L87 Difference]: Start difference. First operand 2323 states and 7048 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) [2021-05-03 14:04:07,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:07,139 INFO L93 Difference]: Finished difference Result 2489 states and 7427 transitions. [2021-05-03 14:04:07,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:04:07,140 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 18 [2021-05-03 14:04:07,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:07,143 INFO L225 Difference]: With dead ends: 2489 [2021-05-03 14:04:07,143 INFO L226 Difference]: Without dead ends: 2489 [2021-05-03 14:04:07,144 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 146.8ms TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:04:07,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2489 states. [2021-05-03 14:04:07,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2489 to 2409. [2021-05-03 14:04:07,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2408 states have (on average 3.034468438538206) internal successors, (7307), 2408 states have internal predecessors, (7307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:07,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 7307 transitions. [2021-05-03 14:04:07,180 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 7307 transitions. Word has length 18 [2021-05-03 14:04:07,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:07,181 INFO L480 AbstractCegarLoop]: Abstraction has 2409 states and 7307 transitions. [2021-05-03 14:04:07,181 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) [2021-05-03 14:04:07,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 7307 transitions. [2021-05-03 14:04:07,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:04:07,184 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:07,184 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:07,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-05-03 14:04:07,385 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:07,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:07,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1659730570, now seen corresponding path program 87 times [2021-05-03 14:04:07,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:07,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074395673] [2021-05-03 14:04:07,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:07,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:07,454 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:07,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074395673] [2021-05-03 14:04:07,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728401905] [2021-05-03 14:04:07,454 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 [2021-05-03 14:04:07,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:04:07,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:07,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:07,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:07,559 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:07,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:07,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-05-03 14:04:07,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542444758] [2021-05-03 14:04:07,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:04:07,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:07,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:04:07,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:04:07,560 INFO L87 Difference]: Start difference. First operand 2409 states and 7307 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) [2021-05-03 14:04:07,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:07,795 INFO L93 Difference]: Finished difference Result 2555 states and 7581 transitions. [2021-05-03 14:04:07,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:04:07,796 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 18 [2021-05-03 14:04:07,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:07,800 INFO L225 Difference]: With dead ends: 2555 [2021-05-03 14:04:07,800 INFO L226 Difference]: Without dead ends: 2555 [2021-05-03 14:04:07,800 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 216.7ms TimeCoverageRelationStatistics Valid=275, Invalid=595, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:04:07,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2021-05-03 14:04:07,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 2408. [2021-05-03 14:04:07,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2407 states have (on average 3.0344827586206895) internal successors, (7304), 2407 states have internal predecessors, (7304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:07,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 7304 transitions. [2021-05-03 14:04:07,836 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 7304 transitions. Word has length 18 [2021-05-03 14:04:07,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:07,836 INFO L480 AbstractCegarLoop]: Abstraction has 2408 states and 7304 transitions. [2021-05-03 14:04:07,836 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) [2021-05-03 14:04:07,836 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 7304 transitions. [2021-05-03 14:04:07,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:04:07,839 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:07,839 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:08,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:08,040 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:08,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:08,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1152101788, now seen corresponding path program 88 times [2021-05-03 14:04:08,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:08,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640158490] [2021-05-03 14:04:08,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:08,128 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:08,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640158490] [2021-05-03 14:04:08,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841331441] [2021-05-03 14:04:08,128 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 [2021-05-03 14:04:08,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:08,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:08,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:08,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:08,201 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:08,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:08,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-05-03 14:04:08,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797323351] [2021-05-03 14:04:08,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:04:08,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:08,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:04:08,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:04:08,202 INFO L87 Difference]: Start difference. First operand 2408 states and 7304 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) [2021-05-03 14:04:08,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:08,389 INFO L93 Difference]: Finished difference Result 2601 states and 7724 transitions. [2021-05-03 14:04:08,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:04:08,390 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 18 [2021-05-03 14:04:08,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:08,394 INFO L225 Difference]: With dead ends: 2601 [2021-05-03 14:04:08,394 INFO L226 Difference]: Without dead ends: 2601 [2021-05-03 14:04:08,394 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 186.8ms TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:04:08,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-05-03 14:04:08,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2436. [2021-05-03 14:04:08,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2436 states, 2435 states have (on average 3.0340862422997947) internal successors, (7388), 2435 states have internal predecessors, (7388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:08,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2436 states to 2436 states and 7388 transitions. [2021-05-03 14:04:08,432 INFO L78 Accepts]: Start accepts. Automaton has 2436 states and 7388 transitions. Word has length 18 [2021-05-03 14:04:08,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:08,433 INFO L480 AbstractCegarLoop]: Abstraction has 2436 states and 7388 transitions. [2021-05-03 14:04:08,433 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) [2021-05-03 14:04:08,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2436 states and 7388 transitions. [2021-05-03 14:04:08,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:04:08,436 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:08,436 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:08,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:08,645 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:08,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:08,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1875408330, now seen corresponding path program 89 times [2021-05-03 14:04:08,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:08,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090062302] [2021-05-03 14:04:08,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:08,708 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:08,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090062302] [2021-05-03 14:04:08,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511152305] [2021-05-03 14:04:08,710 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 [2021-05-03 14:04:08,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:04:08,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:08,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:08,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:08,788 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:08,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:08,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-05-03 14:04:08,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657107039] [2021-05-03 14:04:08,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:04:08,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:08,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:04:08,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:08,790 INFO L87 Difference]: Start difference. First operand 2436 states and 7388 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) [2021-05-03 14:04:09,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:09,119 INFO L93 Difference]: Finished difference Result 2926 states and 8621 transitions. [2021-05-03 14:04:09,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 14:04:09,119 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 18 [2021-05-03 14:04:09,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:09,123 INFO L225 Difference]: With dead ends: 2926 [2021-05-03 14:04:09,123 INFO L226 Difference]: Without dead ends: 2926 [2021-05-03 14:04:09,123 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 268.6ms TimeCoverageRelationStatistics Valid=393, Invalid=867, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 14:04:09,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2021-05-03 14:04:09,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2460. [2021-05-03 14:04:09,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2460 states, 2459 states have (on average 3.0337535583570556) internal successors, (7460), 2459 states have internal predecessors, (7460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:09,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 7460 transitions. [2021-05-03 14:04:09,153 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 7460 transitions. Word has length 18 [2021-05-03 14:04:09,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:09,153 INFO L480 AbstractCegarLoop]: Abstraction has 2460 states and 7460 transitions. [2021-05-03 14:04:09,154 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) [2021-05-03 14:04:09,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 7460 transitions. [2021-05-03 14:04:09,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:09,156 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:09,156 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:09,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-05-03 14:04:09,357 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:09,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:09,357 INFO L82 PathProgramCache]: Analyzing trace with hash -892568151, now seen corresponding path program 90 times [2021-05-03 14:04:09,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:09,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620675526] [2021-05-03 14:04:09,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:09,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:09,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620675526] [2021-05-03 14:04:09,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969360940] [2021-05-03 14:04:09,427 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 [2021-05-03 14:04:09,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:04:09,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:09,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:09,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:09,508 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:09,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:09,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 17 [2021-05-03 14:04:09,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337326882] [2021-05-03 14:04:09,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:04:09,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:09,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:04:09,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:04:09,509 INFO L87 Difference]: Start difference. First operand 2460 states and 7460 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) [2021-05-03 14:04:09,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:09,679 INFO L93 Difference]: Finished difference Result 2653 states and 7746 transitions. [2021-05-03 14:04:09,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:04:09,680 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 20 [2021-05-03 14:04:09,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:09,682 INFO L225 Difference]: With dead ends: 2653 [2021-05-03 14:04:09,682 INFO L226 Difference]: Without dead ends: 2647 [2021-05-03 14:04:09,682 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 166.0ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:04:09,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2647 states. [2021-05-03 14:04:09,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2647 to 2452. [2021-05-03 14:04:09,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 3.025703794369645) internal successors, (7416), 2451 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:09,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 7416 transitions. [2021-05-03 14:04:09,706 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 7416 transitions. Word has length 20 [2021-05-03 14:04:09,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:09,706 INFO L480 AbstractCegarLoop]: Abstraction has 2452 states and 7416 transitions. [2021-05-03 14:04:09,706 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) [2021-05-03 14:04:09,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 7416 transitions. [2021-05-03 14:04:09,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:09,708 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:09,708 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:09,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:09,910 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:09,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:09,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1250996055, now seen corresponding path program 91 times [2021-05-03 14:04:09,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:09,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430693571] [2021-05-03 14:04:09,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:09,964 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:09,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430693571] [2021-05-03 14:04:09,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579217181] [2021-05-03 14:04:09,964 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 [2021-05-03 14:04:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:09,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:09,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:10,016 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:10,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:10,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-05-03 14:04:10,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861933536] [2021-05-03 14:04:10,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:10,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:10,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:10,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:10,017 INFO L87 Difference]: Start difference. First operand 2452 states and 7416 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) [2021-05-03 14:04:10,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:10,122 INFO L93 Difference]: Finished difference Result 2499 states and 7508 transitions. [2021-05-03 14:04:10,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:04:10,122 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 [2021-05-03 14:04:10,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:10,125 INFO L225 Difference]: With dead ends: 2499 [2021-05-03 14:04:10,125 INFO L226 Difference]: Without dead ends: 2498 [2021-05-03 14:04:10,125 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:04:10,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-05-03 14:04:10,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2452. [2021-05-03 14:04:10,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 3.0244798041615666) internal successors, (7413), 2451 states have internal predecessors, (7413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:10,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 7413 transitions. [2021-05-03 14:04:10,151 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 7413 transitions. Word has length 20 [2021-05-03 14:04:10,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:10,151 INFO L480 AbstractCegarLoop]: Abstraction has 2452 states and 7413 transitions. [2021-05-03 14:04:10,151 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) [2021-05-03 14:04:10,151 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 7413 transitions. [2021-05-03 14:04:10,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:10,153 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:10,153 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:10,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:10,354 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:10,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:10,354 INFO L82 PathProgramCache]: Analyzing trace with hash 412854133, now seen corresponding path program 92 times [2021-05-03 14:04:10,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:10,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077411284] [2021-05-03 14:04:10,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:04:10,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077411284] [2021-05-03 14:04:10,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473753704] [2021-05-03 14:04:10,402 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 [2021-05-03 14:04:10,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:10,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:10,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:10,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:10,456 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:04:10,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:10,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-05-03 14:04:10,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488769849] [2021-05-03 14:04:10,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:04:10,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:10,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:04:10,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:10,457 INFO L87 Difference]: Start difference. First operand 2452 states and 7413 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) [2021-05-03 14:04:10,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:10,545 INFO L93 Difference]: Finished difference Result 2670 states and 7781 transitions. [2021-05-03 14:04:10,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:04:10,546 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 [2021-05-03 14:04:10,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:10,549 INFO L225 Difference]: With dead ends: 2670 [2021-05-03 14:04:10,549 INFO L226 Difference]: Without dead ends: 2670 [2021-05-03 14:04:10,550 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:04:10,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2670 states. [2021-05-03 14:04:10,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2670 to 2472. [2021-05-03 14:04:10,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 3.0145690004046943) internal successors, (7449), 2471 states have internal predecessors, (7449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:10,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7449 transitions. [2021-05-03 14:04:10,585 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7449 transitions. Word has length 20 [2021-05-03 14:04:10,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:10,585 INFO L480 AbstractCegarLoop]: Abstraction has 2472 states and 7449 transitions. [2021-05-03 14:04:10,586 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) [2021-05-03 14:04:10,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7449 transitions. [2021-05-03 14:04:10,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:10,589 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:10,589 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:10,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:10,789 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:10,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:10,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1063359831, now seen corresponding path program 93 times [2021-05-03 14:04:10,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:10,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90222588] [2021-05-03 14:04:10,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:10,846 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:10,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90222588] [2021-05-03 14:04:10,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628013813] [2021-05-03 14:04:10,846 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 [2021-05-03 14:04:10,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:04:10,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:10,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:04:10,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:10,903 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:10,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:10,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:04:10,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525532474] [2021-05-03 14:04:10,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:10,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:10,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:10,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:10,904 INFO L87 Difference]: Start difference. First operand 2472 states and 7449 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) [2021-05-03 14:04:11,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:11,053 INFO L93 Difference]: Finished difference Result 2616 states and 7646 transitions. [2021-05-03 14:04:11,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:04:11,053 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 [2021-05-03 14:04:11,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:11,057 INFO L225 Difference]: With dead ends: 2616 [2021-05-03 14:04:11,057 INFO L226 Difference]: Without dead ends: 2608 [2021-05-03 14:04:11,058 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:04:11,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-05-03 14:04:11,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 2441. [2021-05-03 14:04:11,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2441 states, 2440 states have (on average 3.018032786885246) internal successors, (7364), 2440 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:11,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 7364 transitions. [2021-05-03 14:04:11,085 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 7364 transitions. Word has length 20 [2021-05-03 14:04:11,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:11,085 INFO L480 AbstractCegarLoop]: Abstraction has 2441 states and 7364 transitions. [2021-05-03 14:04:11,085 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) [2021-05-03 14:04:11,085 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 7364 transitions. [2021-05-03 14:04:11,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:11,088 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:11,088 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:11,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:11,292 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:11,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:11,292 INFO L82 PathProgramCache]: Analyzing trace with hash -9725549, now seen corresponding path program 94 times [2021-05-03 14:04:11,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:11,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266077039] [2021-05-03 14:04:11,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:11,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:11,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266077039] [2021-05-03 14:04:11,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509788584] [2021-05-03 14:04:11,426 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 [2021-05-03 14:04:11,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:11,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:11,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:11,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:11,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:11,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-05-03 14:04:11,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092830375] [2021-05-03 14:04:11,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:04:11,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:11,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:04:11,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:11,539 INFO L87 Difference]: Start difference. First operand 2441 states and 7364 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) [2021-05-03 14:04:11,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:11,718 INFO L93 Difference]: Finished difference Result 2536 states and 7516 transitions. [2021-05-03 14:04:11,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:04:11,718 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 [2021-05-03 14:04:11,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:11,722 INFO L225 Difference]: With dead ends: 2536 [2021-05-03 14:04:11,722 INFO L226 Difference]: Without dead ends: 2531 [2021-05-03 14:04:11,722 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 176.5ms TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:04:11,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2531 states. [2021-05-03 14:04:11,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2531 to 2441. [2021-05-03 14:04:11,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2441 states, 2440 states have (on average 3.015573770491803) internal successors, (7358), 2440 states have internal predecessors, (7358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:11,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 7358 transitions. [2021-05-03 14:04:11,755 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 7358 transitions. Word has length 20 [2021-05-03 14:04:11,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:11,755 INFO L480 AbstractCegarLoop]: Abstraction has 2441 states and 7358 transitions. [2021-05-03 14:04:11,755 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) [2021-05-03 14:04:11,755 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 7358 transitions. [2021-05-03 14:04:11,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:11,758 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:11,758 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:11,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-05-03 14:04:11,958 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:11,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:11,958 INFO L82 PathProgramCache]: Analyzing trace with hash -856557433, now seen corresponding path program 95 times [2021-05-03 14:04:11,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:11,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039990336] [2021-05-03 14:04:11,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:11,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:12,003 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:04:12,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039990336] [2021-05-03 14:04:12,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123622087] [2021-05-03 14:04:12,003 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 [2021-05-03 14:04:12,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:04:12,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:12,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:12,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:04:12,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:12,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-05-03 14:04:12,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600419122] [2021-05-03 14:04:12,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:04:12,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:12,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:04:12,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:12,061 INFO L87 Difference]: Start difference. First operand 2441 states and 7358 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) [2021-05-03 14:04:12,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:12,139 INFO L93 Difference]: Finished difference Result 2646 states and 7683 transitions. [2021-05-03 14:04:12,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:04:12,140 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 [2021-05-03 14:04:12,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:12,143 INFO L225 Difference]: With dead ends: 2646 [2021-05-03 14:04:12,143 INFO L226 Difference]: Without dead ends: 2644 [2021-05-03 14:04:12,143 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:12,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2021-05-03 14:04:12,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 2425. [2021-05-03 14:04:12,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 3.007838283828383) internal successors, (7291), 2424 states have internal predecessors, (7291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:12,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 7291 transitions. [2021-05-03 14:04:12,176 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 7291 transitions. Word has length 20 [2021-05-03 14:04:12,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:12,177 INFO L480 AbstractCegarLoop]: Abstraction has 2425 states and 7291 transitions. [2021-05-03 14:04:12,177 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) [2021-05-03 14:04:12,177 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 7291 transitions. [2021-05-03 14:04:12,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:12,179 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:12,179 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:12,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-05-03 14:04:12,390 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:12,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:12,390 INFO L82 PathProgramCache]: Analyzing trace with hash -206051735, now seen corresponding path program 96 times [2021-05-03 14:04:12,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:12,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816301993] [2021-05-03 14:04:12,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:12,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:12,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816301993] [2021-05-03 14:04:12,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504459479] [2021-05-03 14:04:12,448 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 [2021-05-03 14:04:12,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:04:12,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:12,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:12,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:12,505 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:12,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:12,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-05-03 14:04:12,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059064725] [2021-05-03 14:04:12,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:12,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:12,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:12,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:12,506 INFO L87 Difference]: Start difference. First operand 2425 states and 7291 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) [2021-05-03 14:04:12,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:12,636 INFO L93 Difference]: Finished difference Result 2573 states and 7502 transitions. [2021-05-03 14:04:12,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:04:12,636 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 [2021-05-03 14:04:12,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:12,640 INFO L225 Difference]: With dead ends: 2573 [2021-05-03 14:04:12,640 INFO L226 Difference]: Without dead ends: 2568 [2021-05-03 14:04:12,640 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:04:12,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2021-05-03 14:04:12,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2418. [2021-05-03 14:04:12,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 3.00330988829127) internal successors, (7259), 2417 states have internal predecessors, (7259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:12,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7259 transitions. [2021-05-03 14:04:12,676 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7259 transitions. Word has length 20 [2021-05-03 14:04:12,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:12,677 INFO L480 AbstractCegarLoop]: Abstraction has 2418 states and 7259 transitions. [2021-05-03 14:04:12,677 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) [2021-05-03 14:04:12,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7259 transitions. [2021-05-03 14:04:12,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:12,679 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:12,679 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:12,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-05-03 14:04:12,897 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:12,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:12,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1279137115, now seen corresponding path program 97 times [2021-05-03 14:04:12,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:12,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489763892] [2021-05-03 14:04:12,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:12,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:12,954 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:12,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489763892] [2021-05-03 14:04:12,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379960190] [2021-05-03 14:04:12,954 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 [2021-05-03 14:04:13,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:13,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:13,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:13,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:13,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-05-03 14:04:13,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729035280] [2021-05-03 14:04:13,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:04:13,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:13,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:04:13,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:13,037 INFO L87 Difference]: Start difference. First operand 2418 states and 7259 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) [2021-05-03 14:04:13,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:13,178 INFO L93 Difference]: Finished difference Result 2568 states and 7475 transitions. [2021-05-03 14:04:13,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:04:13,178 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 [2021-05-03 14:04:13,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:13,182 INFO L225 Difference]: With dead ends: 2568 [2021-05-03 14:04:13,182 INFO L226 Difference]: Without dead ends: 2563 [2021-05-03 14:04:13,182 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:04:13,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2021-05-03 14:04:13,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 2418. [2021-05-03 14:04:13,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.9975175837815473) internal successors, (7245), 2417 states have internal predecessors, (7245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:13,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7245 transitions. [2021-05-03 14:04:13,217 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7245 transitions. Word has length 20 [2021-05-03 14:04:13,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:13,217 INFO L480 AbstractCegarLoop]: Abstraction has 2418 states and 7245 transitions. [2021-05-03 14:04:13,217 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) [2021-05-03 14:04:13,217 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7245 transitions. [2021-05-03 14:04:13,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:13,220 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:13,220 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:13,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable477,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:13,433 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:13,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:13,433 INFO L82 PathProgramCache]: Analyzing trace with hash -185045527, now seen corresponding path program 98 times [2021-05-03 14:04:13,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:13,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381944713] [2021-05-03 14:04:13,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:13,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:13,495 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:13,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381944713] [2021-05-03 14:04:13,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599024331] [2021-05-03 14:04:13,495 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 [2021-05-03 14:04:13,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:13,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:13,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:13,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:13,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:13,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-05-03 14:04:13,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157835682] [2021-05-03 14:04:13,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:04:13,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:13,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:04:13,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:13,554 INFO L87 Difference]: Start difference. First operand 2418 states and 7245 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) [2021-05-03 14:04:13,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:13,664 INFO L93 Difference]: Finished difference Result 2556 states and 7520 transitions. [2021-05-03 14:04:13,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:04:13,665 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 [2021-05-03 14:04:13,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:13,668 INFO L225 Difference]: With dead ends: 2556 [2021-05-03 14:04:13,668 INFO L226 Difference]: Without dead ends: 2553 [2021-05-03 14:04:13,668 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:04:13,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-05-03 14:04:13,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2418. [2021-05-03 14:04:13,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.99669011170873) internal successors, (7243), 2417 states have internal predecessors, (7243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:13,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7243 transitions. [2021-05-03 14:04:13,702 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7243 transitions. Word has length 20 [2021-05-03 14:04:13,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:13,702 INFO L480 AbstractCegarLoop]: Abstraction has 2418 states and 7243 transitions. [2021-05-03 14:04:13,702 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) [2021-05-03 14:04:13,702 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7243 transitions. [2021-05-03 14:04:13,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:13,704 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:13,704 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:13,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-05-03 14:04:13,905 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:13,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:13,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1553610315, now seen corresponding path program 99 times [2021-05-03 14:04:13,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:13,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065368358] [2021-05-03 14:04:13,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:13,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:04:13,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065368358] [2021-05-03 14:04:13,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116744101] [2021-05-03 14:04:13,948 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 [2021-05-03 14:04:13,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:04:13,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:13,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:04:13,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:14,009 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:14,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:14,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:04:14,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194719537] [2021-05-03 14:04:14,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:04:14,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:14,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:04:14,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:14,010 INFO L87 Difference]: Start difference. First operand 2418 states and 7243 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) [2021-05-03 14:04:14,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:14,067 INFO L93 Difference]: Finished difference Result 2583 states and 7523 transitions. [2021-05-03 14:04:14,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:04:14,067 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 20 [2021-05-03 14:04:14,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:14,071 INFO L225 Difference]: With dead ends: 2583 [2021-05-03 14:04:14,071 INFO L226 Difference]: Without dead ends: 2581 [2021-05-03 14:04:14,071 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 40.8ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:14,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2581 states. [2021-05-03 14:04:14,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2581 to 2419. [2021-05-03 14:04:14,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2419 states, 2418 states have (on average 2.9971050454921424) internal successors, (7247), 2418 states have internal predecessors, (7247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:14,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 7247 transitions. [2021-05-03 14:04:14,104 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 7247 transitions. Word has length 20 [2021-05-03 14:04:14,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:14,105 INFO L480 AbstractCegarLoop]: Abstraction has 2419 states and 7247 transitions. [2021-05-03 14:04:14,105 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) [2021-05-03 14:04:14,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 7247 transitions. [2021-05-03 14:04:14,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:14,107 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:14,107 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:14,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:14,308 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:14,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:14,308 INFO L82 PathProgramCache]: Analyzing trace with hash 191844375, now seen corresponding path program 100 times [2021-05-03 14:04:14,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:14,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088703895] [2021-05-03 14:04:14,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:14,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:14,358 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:14,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088703895] [2021-05-03 14:04:14,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636407554] [2021-05-03 14:04:14,358 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 [2021-05-03 14:04:14,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:14,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:14,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 14:04:14,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:14,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:14,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-05-03 14:04:14,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83834109] [2021-05-03 14:04:14,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:04:14,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:14,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:04:14,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:14,412 INFO L87 Difference]: Start difference. First operand 2419 states and 7247 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) [2021-05-03 14:04:14,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:14,470 INFO L93 Difference]: Finished difference Result 2556 states and 7442 transitions. [2021-05-03 14:04:14,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:04:14,471 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 [2021-05-03 14:04:14,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:14,473 INFO L225 Difference]: With dead ends: 2556 [2021-05-03 14:04:14,473 INFO L226 Difference]: Without dead ends: 2556 [2021-05-03 14:04:14,473 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:14,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-05-03 14:04:14,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2398. [2021-05-03 14:04:14,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2397 states have (on average 2.994993742177722) internal successors, (7179), 2397 states have internal predecessors, (7179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:14,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 7179 transitions. [2021-05-03 14:04:14,499 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 7179 transitions. Word has length 20 [2021-05-03 14:04:14,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:14,499 INFO L480 AbstractCegarLoop]: Abstraction has 2398 states and 7179 transitions. [2021-05-03 14:04:14,500 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) [2021-05-03 14:04:14,500 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 7179 transitions. [2021-05-03 14:04:14,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:14,502 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:14,502 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:14,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable480 [2021-05-03 14:04:14,717 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:14,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:14,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1902457683, now seen corresponding path program 101 times [2021-05-03 14:04:14,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:14,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488536877] [2021-05-03 14:04:14,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:14,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488536877] [2021-05-03 14:04:14,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385251733] [2021-05-03 14:04:14,761 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 [2021-05-03 14:04:14,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:04:14,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:14,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:14,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:14,814 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:04:14,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:14,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-05-03 14:04:14,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811343002] [2021-05-03 14:04:14,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:14,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:14,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:14,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:14,820 INFO L87 Difference]: Start difference. First operand 2398 states and 7179 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) [2021-05-03 14:04:14,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:14,878 INFO L93 Difference]: Finished difference Result 2533 states and 7366 transitions. [2021-05-03 14:04:14,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:04:14,878 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 [2021-05-03 14:04:14,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:14,880 INFO L225 Difference]: With dead ends: 2533 [2021-05-03 14:04:14,880 INFO L226 Difference]: Without dead ends: 2533 [2021-05-03 14:04:14,880 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:14,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2021-05-03 14:04:14,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 2394. [2021-05-03 14:04:14,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2394 states, 2393 states have (on average 2.990388633514417) internal successors, (7156), 2393 states have internal predecessors, (7156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:14,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2394 states to 2394 states and 7156 transitions. [2021-05-03 14:04:14,902 INFO L78 Accepts]: Start accepts. Automaton has 2394 states and 7156 transitions. Word has length 20 [2021-05-03 14:04:14,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:14,902 INFO L480 AbstractCegarLoop]: Abstraction has 2394 states and 7156 transitions. [2021-05-03 14:04:14,902 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) [2021-05-03 14:04:14,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2394 states and 7156 transitions. [2021-05-03 14:04:14,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:14,904 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:14,904 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:15,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:15,113 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:15,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:15,113 INFO L82 PathProgramCache]: Analyzing trace with hash -903104617, now seen corresponding path program 102 times [2021-05-03 14:04:15,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:15,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916507206] [2021-05-03 14:04:15,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:15,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:15,175 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:15,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916507206] [2021-05-03 14:04:15,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613594616] [2021-05-03 14:04:15,176 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 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 [2021-05-03 14:04:15,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:04:15,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:15,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:15,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:15,228 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:04:15,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:15,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-05-03 14:04:15,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919247307] [2021-05-03 14:04:15,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:15,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:15,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:15,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:15,229 INFO L87 Difference]: Start difference. First operand 2394 states and 7156 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) [2021-05-03 14:04:15,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:15,339 INFO L93 Difference]: Finished difference Result 2537 states and 7365 transitions. [2021-05-03 14:04:15,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:04:15,339 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 [2021-05-03 14:04:15,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:15,343 INFO L225 Difference]: With dead ends: 2537 [2021-05-03 14:04:15,343 INFO L226 Difference]: Without dead ends: 2534 [2021-05-03 14:04:15,343 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:04:15,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-05-03 14:04:15,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 2390. [2021-05-03 14:04:15,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.9824194223524487) internal successors, (7125), 2389 states have internal predecessors, (7125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:15,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7125 transitions. [2021-05-03 14:04:15,379 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7125 transitions. Word has length 20 [2021-05-03 14:04:15,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:15,379 INFO L480 AbstractCegarLoop]: Abstraction has 2390 states and 7125 transitions. [2021-05-03 14:04:15,379 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) [2021-05-03 14:04:15,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7125 transitions. [2021-05-03 14:04:15,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:15,382 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:15,382 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:15,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:15,595 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:15,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:15,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1976189997, now seen corresponding path program 103 times [2021-05-03 14:04:15,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:15,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569673907] [2021-05-03 14:04:15,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:15,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:15,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569673907] [2021-05-03 14:04:15,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917291268] [2021-05-03 14:04:15,659 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) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:15,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:15,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:15,710 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:15,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:15,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-05-03 14:04:15,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390502233] [2021-05-03 14:04:15,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:04:15,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:15,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:04:15,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:15,711 INFO L87 Difference]: Start difference. First operand 2390 states and 7125 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) [2021-05-03 14:04:15,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:15,837 INFO L93 Difference]: Finished difference Result 2538 states and 7340 transitions. [2021-05-03 14:04:15,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:04:15,837 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 [2021-05-03 14:04:15,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:15,840 INFO L225 Difference]: With dead ends: 2538 [2021-05-03 14:04:15,841 INFO L226 Difference]: Without dead ends: 2533 [2021-05-03 14:04:15,841 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:04:15,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2021-05-03 14:04:15,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 2390. [2021-05-03 14:04:15,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.973629133528673) internal successors, (7104), 2389 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:15,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7104 transitions. [2021-05-03 14:04:15,876 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7104 transitions. Word has length 20 [2021-05-03 14:04:15,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:15,876 INFO L480 AbstractCegarLoop]: Abstraction has 2390 states and 7104 transitions. [2021-05-03 14:04:15,876 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) [2021-05-03 14:04:15,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7104 transitions. [2021-05-03 14:04:15,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:15,879 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:15,879 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:16,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable483 [2021-05-03 14:04:16,093 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:16,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:16,093 INFO L82 PathProgramCache]: Analyzing trace with hash -882098409, now seen corresponding path program 104 times [2021-05-03 14:04:16,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:16,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405092590] [2021-05-03 14:04:16,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:16,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:16,158 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:16,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405092590] [2021-05-03 14:04:16,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351534252] [2021-05-03 14:04:16,158 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 [2021-05-03 14:04:16,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:16,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:16,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:16,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:16,208 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:16,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:16,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-05-03 14:04:16,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828686656] [2021-05-03 14:04:16,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:04:16,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:16,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:04:16,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:16,209 INFO L87 Difference]: Start difference. First operand 2390 states and 7104 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) [2021-05-03 14:04:16,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:16,334 INFO L93 Difference]: Finished difference Result 2545 states and 7407 transitions. [2021-05-03 14:04:16,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:04:16,335 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 [2021-05-03 14:04:16,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:16,338 INFO L225 Difference]: With dead ends: 2545 [2021-05-03 14:04:16,338 INFO L226 Difference]: Without dead ends: 2542 [2021-05-03 14:04:16,338 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:04:16,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2021-05-03 14:04:16,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 2390. [2021-05-03 14:04:16,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.9732105483465885) internal successors, (7103), 2389 states have internal predecessors, (7103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:16,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7103 transitions. [2021-05-03 14:04:16,371 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7103 transitions. Word has length 20 [2021-05-03 14:04:16,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:16,371 INFO L480 AbstractCegarLoop]: Abstraction has 2390 states and 7103 transitions. [2021-05-03 14:04:16,371 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) [2021-05-03 14:04:16,371 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7103 transitions. [2021-05-03 14:04:16,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:16,374 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:16,374 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:16,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:16,574 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:16,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:16,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1324997549, now seen corresponding path program 105 times [2021-05-03 14:04:16,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:16,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302934815] [2021-05-03 14:04:16,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:16,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:16,656 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:16,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302934815] [2021-05-03 14:04:16,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678395285] [2021-05-03 14:04:16,656 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 [2021-05-03 14:04:16,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:04:16,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:16,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:04:16,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:16,723 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:16,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:16,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:04:16,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404313710] [2021-05-03 14:04:16,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:04:16,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:16,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:04:16,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:16,724 INFO L87 Difference]: Start difference. First operand 2390 states and 7103 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) [2021-05-03 14:04:16,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:16,857 INFO L93 Difference]: Finished difference Result 2536 states and 7394 transitions. [2021-05-03 14:04:16,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:04:16,857 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 [2021-05-03 14:04:16,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:16,861 INFO L225 Difference]: With dead ends: 2536 [2021-05-03 14:04:16,861 INFO L226 Difference]: Without dead ends: 2532 [2021-05-03 14:04:16,861 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 135.6ms TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:04:16,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2021-05-03 14:04:16,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 2390. [2021-05-03 14:04:16,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.972791963164504) internal successors, (7102), 2389 states have internal predecessors, (7102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:16,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7102 transitions. [2021-05-03 14:04:16,893 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7102 transitions. Word has length 20 [2021-05-03 14:04:16,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:16,893 INFO L480 AbstractCegarLoop]: Abstraction has 2390 states and 7102 transitions. [2021-05-03 14:04:16,893 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) [2021-05-03 14:04:16,893 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7102 transitions. [2021-05-03 14:04:16,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:16,895 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:16,895 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:17,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable485,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:17,096 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:17,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:17,096 INFO L82 PathProgramCache]: Analyzing trace with hash 774024681, now seen corresponding path program 106 times [2021-05-03 14:04:17,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:17,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811268674] [2021-05-03 14:04:17,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:17,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:17,144 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:17,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811268674] [2021-05-03 14:04:17,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090028619] [2021-05-03 14:04:17,144 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 [2021-05-03 14:04:17,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:17,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:17,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:04:17,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:17,204 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:04:17,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:17,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:04:17,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576687259] [2021-05-03 14:04:17,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:04:17,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:17,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:04:17,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:17,205 INFO L87 Difference]: Start difference. First operand 2390 states and 7102 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) [2021-05-03 14:04:17,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:17,304 INFO L93 Difference]: Finished difference Result 2507 states and 7304 transitions. [2021-05-03 14:04:17,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:04:17,305 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 20 [2021-05-03 14:04:17,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:17,308 INFO L225 Difference]: With dead ends: 2507 [2021-05-03 14:04:17,309 INFO L226 Difference]: Without dead ends: 2507 [2021-05-03 14:04:17,309 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:04:17,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2021-05-03 14:04:17,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2391. [2021-05-03 14:04:17,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2390 states have (on average 2.9728033472803346) internal successors, (7105), 2390 states have internal predecessors, (7105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:17,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 7105 transitions. [2021-05-03 14:04:17,343 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 7105 transitions. Word has length 20 [2021-05-03 14:04:17,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:17,343 INFO L480 AbstractCegarLoop]: Abstraction has 2391 states and 7105 transitions. [2021-05-03 14:04:17,343 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) [2021-05-03 14:04:17,343 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 7105 transitions. [2021-05-03 14:04:17,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:17,345 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:17,345 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:17,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-05-03 14:04:17,556 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:17,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:17,556 INFO L82 PathProgramCache]: Analyzing trace with hash 888022761, now seen corresponding path program 107 times [2021-05-03 14:04:17,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:17,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126682480] [2021-05-03 14:04:17,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:17,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:17,624 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:17,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126682480] [2021-05-03 14:04:17,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075304666] [2021-05-03 14:04:17,625 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 [2021-05-03 14:04:17,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:04:17,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:17,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:04:17,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:17,679 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:17,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:17,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:04:17,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009125257] [2021-05-03 14:04:17,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:17,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:17,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:17,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:17,680 INFO L87 Difference]: Start difference. First operand 2391 states and 7105 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) [2021-05-03 14:04:17,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:17,797 INFO L93 Difference]: Finished difference Result 2530 states and 7380 transitions. [2021-05-03 14:04:17,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:04:17,798 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 20 [2021-05-03 14:04:17,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:17,801 INFO L225 Difference]: With dead ends: 2530 [2021-05-03 14:04:17,802 INFO L226 Difference]: Without dead ends: 2527 [2021-05-03 14:04:17,802 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:04:17,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2527 states. [2021-05-03 14:04:17,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2527 to 2391. [2021-05-03 14:04:17,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2390 states have (on average 2.971548117154812) internal successors, (7102), 2390 states have internal predecessors, (7102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:17,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 7102 transitions. [2021-05-03 14:04:17,836 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 7102 transitions. Word has length 20 [2021-05-03 14:04:17,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:17,836 INFO L480 AbstractCegarLoop]: Abstraction has 2391 states and 7102 transitions. [2021-05-03 14:04:17,836 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) [2021-05-03 14:04:17,836 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 7102 transitions. [2021-05-03 14:04:17,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:17,839 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:17,839 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:18,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-05-03 14:04:18,045 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:18,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:18,045 INFO L82 PathProgramCache]: Analyzing trace with hash -379434417, now seen corresponding path program 108 times [2021-05-03 14:04:18,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:18,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720217931] [2021-05-03 14:04:18,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:18,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720217931] [2021-05-03 14:04:18,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047146117] [2021-05-03 14:04:18,109 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 [2021-05-03 14:04:18,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:04:18,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:18,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:18,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:18,155 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:18,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:18,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-05-03 14:04:18,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479720320] [2021-05-03 14:04:18,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:04:18,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:18,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:04:18,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:18,156 INFO L87 Difference]: Start difference. First operand 2391 states and 7102 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) [2021-05-03 14:04:18,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:18,277 INFO L93 Difference]: Finished difference Result 2601 states and 7491 transitions. [2021-05-03 14:04:18,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:04:18,278 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 [2021-05-03 14:04:18,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:18,280 INFO L225 Difference]: With dead ends: 2601 [2021-05-03 14:04:18,280 INFO L226 Difference]: Without dead ends: 2598 [2021-05-03 14:04:18,280 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:04:18,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2021-05-03 14:04:18,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 2391. [2021-05-03 14:04:18,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2390 states have (on average 2.9673640167364015) internal successors, (7092), 2390 states have internal predecessors, (7092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:18,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 7092 transitions. [2021-05-03 14:04:18,302 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 7092 transitions. Word has length 20 [2021-05-03 14:04:18,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:18,302 INFO L480 AbstractCegarLoop]: Abstraction has 2391 states and 7092 transitions. [2021-05-03 14:04:18,302 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) [2021-05-03 14:04:18,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 7092 transitions. [2021-05-03 14:04:18,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:18,304 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:18,304 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:18,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-05-03 14:04:18,505 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:18,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:18,505 INFO L82 PathProgramCache]: Analyzing trace with hash -822333557, now seen corresponding path program 109 times [2021-05-03 14:04:18,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:18,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280796567] [2021-05-03 14:04:18,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:18,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:18,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280796567] [2021-05-03 14:04:18,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520159361] [2021-05-03 14:04:18,570 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 [2021-05-03 14:04:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:18,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:18,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:18,617 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:18,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:18,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-05-03 14:04:18,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957857077] [2021-05-03 14:04:18,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:04:18,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:18,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:04:18,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:18,618 INFO L87 Difference]: Start difference. First operand 2391 states and 7092 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) [2021-05-03 14:04:18,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:18,733 INFO L93 Difference]: Finished difference Result 2612 states and 7532 transitions. [2021-05-03 14:04:18,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:04:18,733 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 [2021-05-03 14:04:18,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:18,736 INFO L225 Difference]: With dead ends: 2612 [2021-05-03 14:04:18,736 INFO L226 Difference]: Without dead ends: 2604 [2021-05-03 14:04:18,736 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 106.0ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:04:18,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2021-05-03 14:04:18,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 2396. [2021-05-03 14:04:18,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2396 states, 2395 states have (on average 2.9649269311064717) internal successors, (7101), 2395 states have internal predecessors, (7101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:18,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2396 states to 2396 states and 7101 transitions. [2021-05-03 14:04:18,757 INFO L78 Accepts]: Start accepts. Automaton has 2396 states and 7101 transitions. Word has length 20 [2021-05-03 14:04:18,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:18,757 INFO L480 AbstractCegarLoop]: Abstraction has 2396 states and 7101 transitions. [2021-05-03 14:04:18,757 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) [2021-05-03 14:04:18,757 INFO L276 IsEmpty]: Start isEmpty. Operand 2396 states and 7101 transitions. [2021-05-03 14:04:18,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:18,759 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:18,759 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:18,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:18,960 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:18,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:18,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1687413177, now seen corresponding path program 110 times [2021-05-03 14:04:18,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:18,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088856171] [2021-05-03 14:04:18,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:18,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:18,999 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:18,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088856171] [2021-05-03 14:04:18,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874628174] [2021-05-03 14:04:18,999 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 [2021-05-03 14:04:19,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:19,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:19,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:19,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:19,050 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:04:19,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:19,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-05-03 14:04:19,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759826540] [2021-05-03 14:04:19,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:04:19,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:19,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:04:19,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:19,051 INFO L87 Difference]: Start difference. First operand 2396 states and 7101 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) [2021-05-03 14:04:19,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:19,114 INFO L93 Difference]: Finished difference Result 2604 states and 7451 transitions. [2021-05-03 14:04:19,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:04:19,117 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 [2021-05-03 14:04:19,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:19,119 INFO L225 Difference]: With dead ends: 2604 [2021-05-03 14:04:19,119 INFO L226 Difference]: Without dead ends: 2604 [2021-05-03 14:04:19,119 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:04:19,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2021-05-03 14:04:19,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 2417. [2021-05-03 14:04:19,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.9639900662251657) internal successors, (7161), 2416 states have internal predecessors, (7161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:19,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7161 transitions. [2021-05-03 14:04:19,142 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7161 transitions. Word has length 20 [2021-05-03 14:04:19,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:19,142 INFO L480 AbstractCegarLoop]: Abstraction has 2417 states and 7161 transitions. [2021-05-03 14:04:19,142 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) [2021-05-03 14:04:19,142 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7161 transitions. [2021-05-03 14:04:19,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:19,144 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:19,144 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:19,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable490 [2021-05-03 14:04:19,359 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:19,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:19,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1036907479, now seen corresponding path program 111 times [2021-05-03 14:04:19,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:19,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696249961] [2021-05-03 14:04:19,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:19,404 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:19,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696249961] [2021-05-03 14:04:19,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104494346] [2021-05-03 14:04:19,404 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 [2021-05-03 14:04:19,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:04:19,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:19,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:04:19,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:19,469 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:19,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:19,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:04:19,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950135538] [2021-05-03 14:04:19,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:19,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:19,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:19,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:19,470 INFO L87 Difference]: Start difference. First operand 2417 states and 7161 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) [2021-05-03 14:04:19,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:19,576 INFO L93 Difference]: Finished difference Result 2566 states and 7378 transitions. [2021-05-03 14:04:19,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:04:19,577 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 [2021-05-03 14:04:19,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:19,579 INFO L225 Difference]: With dead ends: 2566 [2021-05-03 14:04:19,579 INFO L226 Difference]: Without dead ends: 2563 [2021-05-03 14:04:19,579 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:04:19,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2021-05-03 14:04:19,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 2417. [2021-05-03 14:04:19,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.9598509933774833) internal successors, (7151), 2416 states have internal predecessors, (7151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:19,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7151 transitions. [2021-05-03 14:04:19,605 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7151 transitions. Word has length 20 [2021-05-03 14:04:19,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:19,606 INFO L480 AbstractCegarLoop]: Abstraction has 2417 states and 7151 transitions. [2021-05-03 14:04:19,606 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) [2021-05-03 14:04:19,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7151 transitions. [2021-05-03 14:04:19,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:19,608 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:19,608 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:19,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:19,823 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:19,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:19,823 INFO L82 PathProgramCache]: Analyzing trace with hash -2109992859, now seen corresponding path program 112 times [2021-05-03 14:04:19,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:19,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93027460] [2021-05-03 14:04:19,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:19,874 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:19,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93027460] [2021-05-03 14:04:19,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211157109] [2021-05-03 14:04:19,874 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 [2021-05-03 14:04:19,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:19,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:19,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:19,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:04:19,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:19,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-05-03 14:04:19,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523452604] [2021-05-03 14:04:19,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:04:19,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:19,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:04:19,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:19,935 INFO L87 Difference]: Start difference. First operand 2417 states and 7151 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) [2021-05-03 14:04:20,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:20,068 INFO L93 Difference]: Finished difference Result 2572 states and 7375 transitions. [2021-05-03 14:04:20,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:04:20,068 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 [2021-05-03 14:04:20,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:20,071 INFO L225 Difference]: With dead ends: 2572 [2021-05-03 14:04:20,071 INFO L226 Difference]: Without dead ends: 2567 [2021-05-03 14:04:20,071 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:04:20,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2021-05-03 14:04:20,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 2417. [2021-05-03 14:04:20,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.9536423841059603) internal successors, (7136), 2416 states have internal predecessors, (7136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:20,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7136 transitions. [2021-05-03 14:04:20,098 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7136 transitions. Word has length 20 [2021-05-03 14:04:20,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:20,098 INFO L480 AbstractCegarLoop]: Abstraction has 2417 states and 7136 transitions. [2021-05-03 14:04:20,098 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) [2021-05-03 14:04:20,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7136 transitions. [2021-05-03 14:04:20,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:20,100 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:20,100 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:20,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:20,300 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:20,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:20,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1015901271, now seen corresponding path program 113 times [2021-05-03 14:04:20,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:20,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849040433] [2021-05-03 14:04:20,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:20,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:20,358 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:20,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849040433] [2021-05-03 14:04:20,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033267121] [2021-05-03 14:04:20,359 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 [2021-05-03 14:04:20,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:04:20,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:20,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:04:20,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:20,413 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:20,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:20,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:04:20,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455492832] [2021-05-03 14:04:20,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:04:20,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:20,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:04:20,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:04:20,414 INFO L87 Difference]: Start difference. First operand 2417 states and 7136 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:04:20,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:20,563 INFO L93 Difference]: Finished difference Result 2577 states and 7366 transitions. [2021-05-03 14:04:20,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:04:20,564 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-05-03 14:04:20,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:20,566 INFO L225 Difference]: With dead ends: 2577 [2021-05-03 14:04:20,567 INFO L226 Difference]: Without dead ends: 2571 [2021-05-03 14:04:20,567 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:04:20,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-05-03 14:04:20,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 2418. [2021-05-03 14:04:20,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.945800579230451) internal successors, (7120), 2417 states have internal predecessors, (7120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:20,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7120 transitions. [2021-05-03 14:04:20,593 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7120 transitions. Word has length 20 [2021-05-03 14:04:20,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:20,593 INFO L480 AbstractCegarLoop]: Abstraction has 2418 states and 7120 transitions. [2021-05-03 14:04:20,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:04:20,593 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7120 transitions. [2021-05-03 14:04:20,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:20,596 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:20,596 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:20,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:20,809 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:20,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:20,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1458800411, now seen corresponding path program 114 times [2021-05-03 14:04:20,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:20,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908303190] [2021-05-03 14:04:20,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:20,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:20,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908303190] [2021-05-03 14:04:20,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031798797] [2021-05-03 14:04:20,870 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 [2021-05-03 14:04:20,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:04:20,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:20,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:20,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:20,931 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:20,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:20,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-05-03 14:04:20,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499784099] [2021-05-03 14:04:20,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:04:20,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:20,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:04:20,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:04:20,933 INFO L87 Difference]: Start difference. First operand 2418 states and 7120 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) [2021-05-03 14:04:21,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:21,086 INFO L93 Difference]: Finished difference Result 2689 states and 7651 transitions. [2021-05-03 14:04:21,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:04:21,086 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 [2021-05-03 14:04:21,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:21,089 INFO L225 Difference]: With dead ends: 2689 [2021-05-03 14:04:21,089 INFO L226 Difference]: Without dead ends: 2681 [2021-05-03 14:04:21,089 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 122.3ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:04:21,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2681 states. [2021-05-03 14:04:21,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2681 to 2420. [2021-05-03 14:04:21,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2420 states, 2419 states have (on average 2.9450186027284) internal successors, (7124), 2419 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:21,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2420 states to 2420 states and 7124 transitions. [2021-05-03 14:04:21,114 INFO L78 Accepts]: Start accepts. Automaton has 2420 states and 7124 transitions. Word has length 20 [2021-05-03 14:04:21,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:21,114 INFO L480 AbstractCegarLoop]: Abstraction has 2420 states and 7124 transitions. [2021-05-03 14:04:21,114 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) [2021-05-03 14:04:21,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2420 states and 7124 transitions. [2021-05-03 14:04:21,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:21,116 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:21,116 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:21,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:21,324 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:21,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:21,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1991195433, now seen corresponding path program 115 times [2021-05-03 14:04:21,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:21,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556004069] [2021-05-03 14:04:21,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:21,389 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:21,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556004069] [2021-05-03 14:04:21,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321023165] [2021-05-03 14:04:21,390 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 [2021-05-03 14:04:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:21,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:21,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:21,473 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:21,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:21,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-05-03 14:04:21,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55230798] [2021-05-03 14:04:21,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:04:21,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:21,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:04:21,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:04:21,473 INFO L87 Difference]: Start difference. First operand 2420 states and 7124 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) [2021-05-03 14:04:21,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:21,621 INFO L93 Difference]: Finished difference Result 2675 states and 7629 transitions. [2021-05-03 14:04:21,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:04:21,621 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 [2021-05-03 14:04:21,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:21,624 INFO L225 Difference]: With dead ends: 2675 [2021-05-03 14:04:21,624 INFO L226 Difference]: Without dead ends: 2660 [2021-05-03 14:04:21,624 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:04:21,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2021-05-03 14:04:21,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 2425. [2021-05-03 14:04:21,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 2.942656765676568) internal successors, (7133), 2424 states have internal predecessors, (7133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:21,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 7133 transitions. [2021-05-03 14:04:21,648 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 7133 transitions. Word has length 20 [2021-05-03 14:04:21,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:21,648 INFO L480 AbstractCegarLoop]: Abstraction has 2425 states and 7133 transitions. [2021-05-03 14:04:21,648 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) [2021-05-03 14:04:21,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 7133 transitions. [2021-05-03 14:04:21,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:21,650 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:21,650 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:21,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:21,851 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:21,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:21,851 INFO L82 PathProgramCache]: Analyzing trace with hash -823260751, now seen corresponding path program 116 times [2021-05-03 14:04:21,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:21,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240191103] [2021-05-03 14:04:21,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:21,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:21,912 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:21,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240191103] [2021-05-03 14:04:21,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664950878] [2021-05-03 14:04:21,912 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 [2021-05-03 14:04:21,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:21,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:21,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:04:21,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:21,972 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:21,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:21,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:04:21,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745218694] [2021-05-03 14:04:21,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:21,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:21,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:21,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:21,973 INFO L87 Difference]: Start difference. First operand 2425 states and 7133 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) [2021-05-03 14:04:22,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:22,074 INFO L93 Difference]: Finished difference Result 2669 states and 7579 transitions. [2021-05-03 14:04:22,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:04:22,075 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 20 [2021-05-03 14:04:22,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:22,077 INFO L225 Difference]: With dead ends: 2669 [2021-05-03 14:04:22,077 INFO L226 Difference]: Without dead ends: 2669 [2021-05-03 14:04:22,077 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:04:22,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2669 states. [2021-05-03 14:04:22,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2669 to 2472. [2021-05-03 14:04:22,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.9405099150141645) internal successors, (7266), 2471 states have internal predecessors, (7266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:22,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7266 transitions. [2021-05-03 14:04:22,102 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7266 transitions. Word has length 20 [2021-05-03 14:04:22,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:22,102 INFO L480 AbstractCegarLoop]: Abstraction has 2472 states and 7266 transitions. [2021-05-03 14:04:22,102 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) [2021-05-03 14:04:22,102 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7266 transitions. [2021-05-03 14:04:22,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:22,104 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:22,104 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:22,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-05-03 14:04:22,305 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:22,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:22,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1875348307, now seen corresponding path program 117 times [2021-05-03 14:04:22,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:22,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074169117] [2021-05-03 14:04:22,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:22,365 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:22,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074169117] [2021-05-03 14:04:22,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765597496] [2021-05-03 14:04:22,366 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) [2021-05-03 14:04:22,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:04:22,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:22,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:04:22,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:22,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:22,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:04:22,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690028486] [2021-05-03 14:04:22,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:04:22,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:22,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:04:22,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:22,426 INFO L87 Difference]: Start difference. First operand 2472 states and 7266 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) [2021-05-03 14:04:22,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:22,532 INFO L93 Difference]: Finished difference Result 2639 states and 7604 transitions. [2021-05-03 14:04:22,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:04:22,532 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 [2021-05-03 14:04:22,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:22,534 INFO L225 Difference]: With dead ends: 2639 [2021-05-03 14:04:22,534 INFO L226 Difference]: Without dead ends: 2635 [2021-05-03 14:04:22,534 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:04:22,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2021-05-03 14:04:22,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2472. [2021-05-03 14:04:22,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.9384864427357344) internal successors, (7261), 2471 states have internal predecessors, (7261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:22,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7261 transitions. [2021-05-03 14:04:22,556 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7261 transitions. Word has length 20 [2021-05-03 14:04:22,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:22,556 INFO L480 AbstractCegarLoop]: Abstraction has 2472 states and 7261 transitions. [2021-05-03 14:04:22,556 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) [2021-05-03 14:04:22,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7261 transitions. [2021-05-03 14:04:22,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:22,558 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:22,558 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:22,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-05-03 14:04:22,758 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:22,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:22,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1238881453, now seen corresponding path program 118 times [2021-05-03 14:04:22,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:22,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660467791] [2021-05-03 14:04:22,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:22,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:22,829 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:22,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660467791] [2021-05-03 14:04:22,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235405358] [2021-05-03 14:04:22,829 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 [2021-05-03 14:04:22,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:22,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:22,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:22,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:22,883 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:22,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:22,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-05-03 14:04:22,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122020362] [2021-05-03 14:04:22,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:04:22,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:22,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:04:22,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:04:22,884 INFO L87 Difference]: Start difference. First operand 2472 states and 7261 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) [2021-05-03 14:04:23,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:23,039 INFO L93 Difference]: Finished difference Result 2718 states and 7731 transitions. [2021-05-03 14:04:23,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:04:23,040 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 [2021-05-03 14:04:23,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:23,042 INFO L225 Difference]: With dead ends: 2718 [2021-05-03 14:04:23,042 INFO L226 Difference]: Without dead ends: 2714 [2021-05-03 14:04:23,042 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:04:23,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2021-05-03 14:04:23,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 2472. [2021-05-03 14:04:23,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.9348441926345608) internal successors, (7252), 2471 states have internal predecessors, (7252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:23,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7252 transitions. [2021-05-03 14:04:23,069 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7252 transitions. Word has length 20 [2021-05-03 14:04:23,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:23,069 INFO L480 AbstractCegarLoop]: Abstraction has 2472 states and 7252 transitions. [2021-05-03 14:04:23,069 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) [2021-05-03 14:04:23,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7252 transitions. [2021-05-03 14:04:23,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:23,071 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:23,071 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:23,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-05-03 14:04:23,286 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:23,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:23,286 INFO L82 PathProgramCache]: Analyzing trace with hash 393910001, now seen corresponding path program 119 times [2021-05-03 14:04:23,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:23,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383325010] [2021-05-03 14:04:23,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:23,361 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:23,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383325010] [2021-05-03 14:04:23,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338695001] [2021-05-03 14:04:23,362 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 [2021-05-03 14:04:23,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:04:23,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:23,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:23,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:23,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:23,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-05-03 14:04:23,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899070812] [2021-05-03 14:04:23,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:04:23,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:23,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:04:23,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:04:23,415 INFO L87 Difference]: Start difference. First operand 2472 states and 7252 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) [2021-05-03 14:04:23,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:23,536 INFO L93 Difference]: Finished difference Result 2775 states and 7866 transitions. [2021-05-03 14:04:23,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:04:23,537 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 [2021-05-03 14:04:23,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:23,539 INFO L225 Difference]: With dead ends: 2775 [2021-05-03 14:04:23,539 INFO L226 Difference]: Without dead ends: 2760 [2021-05-03 14:04:23,540 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 132.5ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:04:23,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2021-05-03 14:04:23,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2486. [2021-05-03 14:04:23,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 2.9287726358148896) internal successors, (7278), 2485 states have internal predecessors, (7278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:23,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 7278 transitions. [2021-05-03 14:04:23,564 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 7278 transitions. Word has length 20 [2021-05-03 14:04:23,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:23,564 INFO L480 AbstractCegarLoop]: Abstraction has 2486 states and 7278 transitions. [2021-05-03 14:04:23,564 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) [2021-05-03 14:04:23,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 7278 transitions. [2021-05-03 14:04:23,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:23,566 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:23,566 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:23,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-05-03 14:04:23,766 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:23,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:23,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1540334603, now seen corresponding path program 120 times [2021-05-03 14:04:23,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:23,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089099924] [2021-05-03 14:04:23,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:23,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:23,813 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:23,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089099924] [2021-05-03 14:04:23,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642286626] [2021-05-03 14:04:23,814 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 [2021-05-03 14:04:23,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:04:23,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:23,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:23,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:23,866 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:04:23,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:23,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-05-03 14:04:23,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442900507] [2021-05-03 14:04:23,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:23,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:23,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:23,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:23,866 INFO L87 Difference]: Start difference. First operand 2486 states and 7278 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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) [2021-05-03 14:04:23,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:23,943 INFO L93 Difference]: Finished difference Result 2905 states and 8228 transitions. [2021-05-03 14:04:23,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:04:23,943 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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 [2021-05-03 14:04:23,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:23,946 INFO L225 Difference]: With dead ends: 2905 [2021-05-03 14:04:23,946 INFO L226 Difference]: Without dead ends: 2905 [2021-05-03 14:04:23,946 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:23,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2905 states. [2021-05-03 14:04:23,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2905 to 2666. [2021-05-03 14:04:23,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2665 states have (on average 2.9448405253283303) internal successors, (7848), 2665 states have internal predecessors, (7848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:23,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 7848 transitions. [2021-05-03 14:04:23,972 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 7848 transitions. Word has length 20 [2021-05-03 14:04:23,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:23,972 INFO L480 AbstractCegarLoop]: Abstraction has 2666 states and 7848 transitions. [2021-05-03 14:04:23,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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) [2021-05-03 14:04:23,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 7848 transitions. [2021-05-03 14:04:23,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:23,974 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:23,974 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:24,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable500 [2021-05-03 14:04:24,174 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:24,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:24,175 INFO L82 PathProgramCache]: Analyzing trace with hash -889828905, now seen corresponding path program 121 times [2021-05-03 14:04:24,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:24,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051688204] [2021-05-03 14:04:24,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:24,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:24,224 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:24,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051688204] [2021-05-03 14:04:24,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005888553] [2021-05-03 14:04:24,224 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 [2021-05-03 14:04:24,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:24,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:24,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:24,278 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:24,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:24,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-05-03 14:04:24,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958510411] [2021-05-03 14:04:24,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:24,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:24,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:24,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:24,279 INFO L87 Difference]: Start difference. First operand 2666 states and 7848 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) [2021-05-03 14:04:24,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:24,390 INFO L93 Difference]: Finished difference Result 2846 states and 8143 transitions. [2021-05-03 14:04:24,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:04:24,391 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 [2021-05-03 14:04:24,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:24,394 INFO L225 Difference]: With dead ends: 2846 [2021-05-03 14:04:24,394 INFO L226 Difference]: Without dead ends: 2845 [2021-05-03 14:04:24,394 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:04:24,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2845 states. [2021-05-03 14:04:24,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2845 to 2666. [2021-05-03 14:04:24,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2665 states have (on average 2.94296435272045) internal successors, (7843), 2665 states have internal predecessors, (7843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:24,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 7843 transitions. [2021-05-03 14:04:24,420 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 7843 transitions. Word has length 20 [2021-05-03 14:04:24,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:24,420 INFO L480 AbstractCegarLoop]: Abstraction has 2666 states and 7843 transitions. [2021-05-03 14:04:24,420 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) [2021-05-03 14:04:24,420 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 7843 transitions. [2021-05-03 14:04:24,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:24,422 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:24,422 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:24,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable501,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:24,623 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:24,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:24,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1962914285, now seen corresponding path program 122 times [2021-05-03 14:04:24,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:24,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152138155] [2021-05-03 14:04:24,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:24,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:24,687 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:24,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152138155] [2021-05-03 14:04:24,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506887776] [2021-05-03 14:04:24,688 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 [2021-05-03 14:04:24,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:24,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:24,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:24,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:24,750 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 29 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:24,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:24,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-05-03 14:04:24,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452859265] [2021-05-03 14:04:24,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:04:24,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:24,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:04:24,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:24,751 INFO L87 Difference]: Start difference. First operand 2666 states and 7843 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) [2021-05-03 14:04:24,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:24,875 INFO L93 Difference]: Finished difference Result 2854 states and 8145 transitions. [2021-05-03 14:04:24,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:04:24,875 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 [2021-05-03 14:04:24,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:24,878 INFO L225 Difference]: With dead ends: 2854 [2021-05-03 14:04:24,878 INFO L226 Difference]: Without dead ends: 2849 [2021-05-03 14:04:24,878 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:04:24,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2849 states. [2021-05-03 14:04:24,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2849 to 2687. [2021-05-03 14:04:24,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2686 states have (on average 2.9389426656738644) internal successors, (7894), 2686 states have internal predecessors, (7894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:24,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 7894 transitions. [2021-05-03 14:04:24,903 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 7894 transitions. Word has length 20 [2021-05-03 14:04:24,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:24,903 INFO L480 AbstractCegarLoop]: Abstraction has 2687 states and 7894 transitions. [2021-05-03 14:04:24,903 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) [2021-05-03 14:04:24,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 7894 transitions. [2021-05-03 14:04:24,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:24,905 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:24,905 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:25,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-05-03 14:04:25,120 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:25,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:25,120 INFO L82 PathProgramCache]: Analyzing trace with hash -868822697, now seen corresponding path program 123 times [2021-05-03 14:04:25,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:25,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647634487] [2021-05-03 14:04:25,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:25,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:25,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647634487] [2021-05-03 14:04:25,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488679594] [2021-05-03 14:04:25,173 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 [2021-05-03 14:04:25,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:04:25,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:25,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:25,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:04:25,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:25,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-05-03 14:04:25,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940816234] [2021-05-03 14:04:25,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:04:25,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:25,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:04:25,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:25,226 INFO L87 Difference]: Start difference. First operand 2687 states and 7894 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) [2021-05-03 14:04:25,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:25,342 INFO L93 Difference]: Finished difference Result 3212 states and 8981 transitions. [2021-05-03 14:04:25,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:04:25,342 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 [2021-05-03 14:04:25,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:25,344 INFO L225 Difference]: With dead ends: 3212 [2021-05-03 14:04:25,345 INFO L226 Difference]: Without dead ends: 3209 [2021-05-03 14:04:25,345 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:04:25,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3209 states. [2021-05-03 14:04:25,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3209 to 2687. [2021-05-03 14:04:25,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2686 states have (on average 2.937453462397617) internal successors, (7890), 2686 states have internal predecessors, (7890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:25,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 7890 transitions. [2021-05-03 14:04:25,369 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 7890 transitions. Word has length 20 [2021-05-03 14:04:25,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:25,369 INFO L480 AbstractCegarLoop]: Abstraction has 2687 states and 7890 transitions. [2021-05-03 14:04:25,369 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) [2021-05-03 14:04:25,369 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 7890 transitions. [2021-05-03 14:04:25,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:25,371 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:25,371 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:25,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-05-03 14:04:25,572 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:25,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:25,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1311721837, now seen corresponding path program 124 times [2021-05-03 14:04:25,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:25,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450726394] [2021-05-03 14:04:25,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:25,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:25,633 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:25,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450726394] [2021-05-03 14:04:25,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45416360] [2021-05-03 14:04:25,633 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 [2021-05-03 14:04:25,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:25,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:25,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:25,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:25,687 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:25,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:25,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-05-03 14:04:25,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894276735] [2021-05-03 14:04:25,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:04:25,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:25,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:04:25,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:04:25,687 INFO L87 Difference]: Start difference. First operand 2687 states and 7890 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) [2021-05-03 14:04:25,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:25,808 INFO L93 Difference]: Finished difference Result 3217 states and 8981 transitions. [2021-05-03 14:04:25,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:04:25,809 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 [2021-05-03 14:04:25,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:25,811 INFO L225 Difference]: With dead ends: 3217 [2021-05-03 14:04:25,811 INFO L226 Difference]: Without dead ends: 3209 [2021-05-03 14:04:25,811 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 104.5ms TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:04:25,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3209 states. [2021-05-03 14:04:25,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3209 to 2709. [2021-05-03 14:04:25,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2708 states have (on average 2.9309453471196454) internal successors, (7937), 2708 states have internal predecessors, (7937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:25,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 7937 transitions. [2021-05-03 14:04:25,836 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 7937 transitions. Word has length 20 [2021-05-03 14:04:25,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:25,836 INFO L480 AbstractCegarLoop]: Abstraction has 2709 states and 7937 transitions. [2021-05-03 14:04:25,836 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) [2021-05-03 14:04:25,836 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 7937 transitions. [2021-05-03 14:04:25,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:25,837 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:25,837 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:26,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable504 [2021-05-03 14:04:26,045 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:26,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:26,045 INFO L82 PathProgramCache]: Analyzing trace with hash 2138274007, now seen corresponding path program 125 times [2021-05-03 14:04:26,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:26,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129118408] [2021-05-03 14:04:26,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:26,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:26,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129118408] [2021-05-03 14:04:26,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648594983] [2021-05-03 14:04:26,111 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 [2021-05-03 14:04:26,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:04:26,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:26,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:26,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:26,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:26,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-05-03 14:04:26,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84459688] [2021-05-03 14:04:26,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:04:26,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:26,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:04:26,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:04:26,205 INFO L87 Difference]: Start difference. First operand 2709 states and 7937 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) [2021-05-03 14:04:26,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:26,323 INFO L93 Difference]: Finished difference Result 3000 states and 8519 transitions. [2021-05-03 14:04:26,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:04:26,324 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 20 [2021-05-03 14:04:26,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:26,327 INFO L225 Difference]: With dead ends: 3000 [2021-05-03 14:04:26,327 INFO L226 Difference]: Without dead ends: 2995 [2021-05-03 14:04:26,327 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:04:26,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2021-05-03 14:04:26,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 2709. [2021-05-03 14:04:26,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2708 states have (on average 2.930576070901034) internal successors, (7936), 2708 states have internal predecessors, (7936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:26,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 7936 transitions. [2021-05-03 14:04:26,354 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 7936 transitions. Word has length 20 [2021-05-03 14:04:26,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:26,354 INFO L480 AbstractCegarLoop]: Abstraction has 2709 states and 7936 transitions. [2021-05-03 14:04:26,354 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) [2021-05-03 14:04:26,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 7936 transitions. [2021-05-03 14:04:26,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:26,356 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:26,356 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:26,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:26,556 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:26,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:26,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1713962771, now seen corresponding path program 126 times [2021-05-03 14:04:26,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:26,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857293435] [2021-05-03 14:04:26,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:26,623 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:26,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857293435] [2021-05-03 14:04:26,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18260790] [2021-05-03 14:04:26,624 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 [2021-05-03 14:04:26,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:04:26,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:26,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:26,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:26,676 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:26,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:26,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-05-03 14:04:26,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144350524] [2021-05-03 14:04:26,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:04:26,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:26,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:04:26,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:04:26,677 INFO L87 Difference]: Start difference. First operand 2709 states and 7936 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) [2021-05-03 14:04:26,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:26,788 INFO L93 Difference]: Finished difference Result 2966 states and 8462 transitions. [2021-05-03 14:04:26,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:04:26,788 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 [2021-05-03 14:04:26,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:26,791 INFO L225 Difference]: With dead ends: 2966 [2021-05-03 14:04:26,791 INFO L226 Difference]: Without dead ends: 2960 [2021-05-03 14:04:26,791 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:04:26,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2021-05-03 14:04:26,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 2709. [2021-05-03 14:04:26,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2708 states have (on average 2.9302067946824226) internal successors, (7935), 2708 states have internal predecessors, (7935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:26,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 7935 transitions. [2021-05-03 14:04:26,818 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 7935 transitions. Word has length 20 [2021-05-03 14:04:26,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:26,818 INFO L480 AbstractCegarLoop]: Abstraction has 2709 states and 7935 transitions. [2021-05-03 14:04:26,818 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) [2021-05-03 14:04:26,818 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 7935 transitions. [2021-05-03 14:04:26,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:26,819 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:26,820 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:27,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable506 [2021-05-03 14:04:27,020 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:27,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:27,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1200498409, now seen corresponding path program 127 times [2021-05-03 14:04:27,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:27,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189620202] [2021-05-03 14:04:27,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:27,108 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:27,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189620202] [2021-05-03 14:04:27,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990323232] [2021-05-03 14:04:27,109 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) [2021-05-03 14:04:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:27,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:27,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:27,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:27,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-03 14:04:27,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850101038] [2021-05-03 14:04:27,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:04:27,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:27,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:04:27,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:04:27,214 INFO L87 Difference]: Start difference. First operand 2709 states and 7935 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) [2021-05-03 14:04:27,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:27,340 INFO L93 Difference]: Finished difference Result 2994 states and 8494 transitions. [2021-05-03 14:04:27,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:04:27,341 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 [2021-05-03 14:04:27,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:27,344 INFO L225 Difference]: With dead ends: 2994 [2021-05-03 14:04:27,344 INFO L226 Difference]: Without dead ends: 2994 [2021-05-03 14:04:27,344 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 114.6ms TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:04:27,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2994 states. [2021-05-03 14:04:27,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2994 to 2744. [2021-05-03 14:04:27,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 2743 states have (on average 2.930368209989063) internal successors, (8038), 2743 states have internal predecessors, (8038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:27,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 8038 transitions. [2021-05-03 14:04:27,378 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 8038 transitions. Word has length 20 [2021-05-03 14:04:27,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:27,378 INFO L480 AbstractCegarLoop]: Abstraction has 2744 states and 8038 transitions. [2021-05-03 14:04:27,378 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) [2021-05-03 14:04:27,378 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 8038 transitions. [2021-05-03 14:04:27,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:27,380 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:27,380 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:27,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable507 [2021-05-03 14:04:27,595 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:27,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:27,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1877298135, now seen corresponding path program 128 times [2021-05-03 14:04:27,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:27,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637615517] [2021-05-03 14:04:27,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:27,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:27,691 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:27,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637615517] [2021-05-03 14:04:27,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498029668] [2021-05-03 14:04:27,692 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 [2021-05-03 14:04:27,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:27,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:27,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:27,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:27,754 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:27,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:27,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2021-05-03 14:04:27,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593477783] [2021-05-03 14:04:27,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:04:27,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:27,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:04:27,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:27,755 INFO L87 Difference]: Start difference. First operand 2744 states and 8038 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) [2021-05-03 14:04:27,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:27,904 INFO L93 Difference]: Finished difference Result 2954 states and 8469 transitions. [2021-05-03 14:04:27,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:04:27,904 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 [2021-05-03 14:04:27,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:27,907 INFO L225 Difference]: With dead ends: 2954 [2021-05-03 14:04:27,907 INFO L226 Difference]: Without dead ends: 2949 [2021-05-03 14:04:27,908 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 175.0ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:04:27,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2949 states. [2021-05-03 14:04:27,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2949 to 2744. [2021-05-03 14:04:27,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 2743 states have (on average 2.9292745169522423) internal successors, (8035), 2743 states have internal predecessors, (8035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:27,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 8035 transitions. [2021-05-03 14:04:27,935 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 8035 transitions. Word has length 20 [2021-05-03 14:04:27,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:27,935 INFO L480 AbstractCegarLoop]: Abstraction has 2744 states and 8035 transitions. [2021-05-03 14:04:27,935 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) [2021-05-03 14:04:27,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 8035 transitions. [2021-05-03 14:04:27,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:27,937 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:27,937 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:28,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:28,152 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:28,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:28,152 INFO L82 PathProgramCache]: Analyzing trace with hash -132934129, now seen corresponding path program 129 times [2021-05-03 14:04:28,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:28,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526686122] [2021-05-03 14:04:28,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:28,258 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:28,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526686122] [2021-05-03 14:04:28,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399501359] [2021-05-03 14:04:28,259 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 [2021-05-03 14:04:28,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:04:28,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:28,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:04:28,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:28,353 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:28,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:28,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-05-03 14:04:28,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932457943] [2021-05-03 14:04:28,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:04:28,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:28,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:04:28,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:28,354 INFO L87 Difference]: Start difference. First operand 2744 states and 8035 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) [2021-05-03 14:04:28,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:28,516 INFO L93 Difference]: Finished difference Result 3147 states and 8824 transitions. [2021-05-03 14:04:28,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:04:28,517 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 [2021-05-03 14:04:28,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:28,520 INFO L225 Difference]: With dead ends: 3147 [2021-05-03 14:04:28,520 INFO L226 Difference]: Without dead ends: 3132 [2021-05-03 14:04:28,520 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 184.6ms TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:04:28,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2021-05-03 14:04:28,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 2748. [2021-05-03 14:04:28,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2748 states, 2747 states have (on average 2.9257371678194395) internal successors, (8037), 2747 states have internal predecessors, (8037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:28,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2748 states to 2748 states and 8037 transitions. [2021-05-03 14:04:28,550 INFO L78 Accepts]: Start accepts. Automaton has 2748 states and 8037 transitions. Word has length 20 [2021-05-03 14:04:28,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:28,551 INFO L480 AbstractCegarLoop]: Abstraction has 2748 states and 8037 transitions. [2021-05-03 14:04:28,551 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) [2021-05-03 14:04:28,551 INFO L276 IsEmpty]: Start isEmpty. Operand 2748 states and 8037 transitions. [2021-05-03 14:04:28,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:28,553 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:28,553 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:28,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:28,768 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:28,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:28,769 INFO L82 PathProgramCache]: Analyzing trace with hash -557245365, now seen corresponding path program 130 times [2021-05-03 14:04:28,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:28,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296625835] [2021-05-03 14:04:28,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:28,841 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:28,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296625835] [2021-05-03 14:04:28,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834682674] [2021-05-03 14:04:28,841 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) [2021-05-03 14:04:28,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:28,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:28,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:28,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:28,904 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:28,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:28,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2021-05-03 14:04:28,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505891059] [2021-05-03 14:04:28,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:04:28,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:28,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:04:28,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:28,905 INFO L87 Difference]: Start difference. First operand 2748 states and 8037 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) [2021-05-03 14:04:29,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:29,036 INFO L93 Difference]: Finished difference Result 3023 states and 8605 transitions. [2021-05-03 14:04:29,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:04:29,036 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 [2021-05-03 14:04:29,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:29,039 INFO L225 Difference]: With dead ends: 3023 [2021-05-03 14:04:29,039 INFO L226 Difference]: Without dead ends: 3017 [2021-05-03 14:04:29,039 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 152.4ms TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:04:29,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3017 states. [2021-05-03 14:04:29,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3017 to 2748. [2021-05-03 14:04:29,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2748 states, 2747 states have (on average 2.925373134328358) internal successors, (8036), 2747 states have internal predecessors, (8036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:29,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2748 states to 2748 states and 8036 transitions. [2021-05-03 14:04:29,068 INFO L78 Accepts]: Start accepts. Automaton has 2748 states and 8036 transitions. Word has length 20 [2021-05-03 14:04:29,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:29,068 INFO L480 AbstractCegarLoop]: Abstraction has 2748 states and 8036 transitions. [2021-05-03 14:04:29,068 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) [2021-05-03 14:04:29,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2748 states and 8036 transitions. [2021-05-03 14:04:29,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:29,070 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:29,070 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:29,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-05-03 14:04:29,285 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:29,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:29,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1275866105, now seen corresponding path program 131 times [2021-05-03 14:04:29,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:29,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523260024] [2021-05-03 14:04:29,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:29,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523260024] [2021-05-03 14:04:29,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290446626] [2021-05-03 14:04:29,373 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 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 [2021-05-03 14:04:29,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:04:29,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:29,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:29,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:29,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:29,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 15 [2021-05-03 14:04:29,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443925484] [2021-05-03 14:04:29,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:04:29,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:29,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:04:29,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:29,448 INFO L87 Difference]: Start difference. First operand 2748 states and 8036 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) [2021-05-03 14:04:29,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:29,551 INFO L93 Difference]: Finished difference Result 3263 states and 9284 transitions. [2021-05-03 14:04:29,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:04:29,552 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 [2021-05-03 14:04:29,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:29,555 INFO L225 Difference]: With dead ends: 3263 [2021-05-03 14:04:29,555 INFO L226 Difference]: Without dead ends: 3263 [2021-05-03 14:04:29,555 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:04:29,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3263 states. [2021-05-03 14:04:29,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3263 to 3010. [2021-05-03 14:04:29,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 2.9478231970754405) internal successors, (8870), 3009 states have internal predecessors, (8870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:29,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 8870 transitions. [2021-05-03 14:04:29,587 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 8870 transitions. Word has length 20 [2021-05-03 14:04:29,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:29,587 INFO L480 AbstractCegarLoop]: Abstraction has 3010 states and 8870 transitions. [2021-05-03 14:04:29,587 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) [2021-05-03 14:04:29,587 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 8870 transitions. [2021-05-03 14:04:29,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:29,589 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:29,589 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:29,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2021-05-03 14:04:29,790 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:29,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:29,790 INFO L82 PathProgramCache]: Analyzing trace with hash -625360407, now seen corresponding path program 132 times [2021-05-03 14:04:29,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:29,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749375958] [2021-05-03 14:04:29,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:29,853 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:29,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749375958] [2021-05-03 14:04:29,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471071321] [2021-05-03 14:04:29,853 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) [2021-05-03 14:04:29,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:04:29,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:29,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:29,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:04:29,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:29,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 14 [2021-05-03 14:04:29,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235508269] [2021-05-03 14:04:29,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:04:29,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:29,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:04:29,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:04:29,924 INFO L87 Difference]: Start difference. First operand 3010 states and 8870 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) [2021-05-03 14:04:30,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:30,052 INFO L93 Difference]: Finished difference Result 3211 states and 9205 transitions. [2021-05-03 14:04:30,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:04:30,052 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 20 [2021-05-03 14:04:30,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:30,070 INFO L225 Difference]: With dead ends: 3211 [2021-05-03 14:04:30,070 INFO L226 Difference]: Without dead ends: 3210 [2021-05-03 14:04:30,071 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:04:30,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2021-05-03 14:04:30,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 3010. [2021-05-03 14:04:30,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 2.94749086075108) internal successors, (8869), 3009 states have internal predecessors, (8869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:30,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 8869 transitions. [2021-05-03 14:04:30,123 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 8869 transitions. Word has length 20 [2021-05-03 14:04:30,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:30,123 INFO L480 AbstractCegarLoop]: Abstraction has 3010 states and 8869 transitions. [2021-05-03 14:04:30,123 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) [2021-05-03 14:04:30,123 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 8869 transitions. [2021-05-03 14:04:30,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:30,125 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:30,125 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:30,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-05-03 14:04:30,340 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:30,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:30,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1698445787, now seen corresponding path program 133 times [2021-05-03 14:04:30,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:30,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305648742] [2021-05-03 14:04:30,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:30,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:30,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305648742] [2021-05-03 14:04:30,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859216195] [2021-05-03 14:04:30,416 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 [2021-05-03 14:04:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:30,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:30,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:30,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:30,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2021-05-03 14:04:30,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998695953] [2021-05-03 14:04:30,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:04:30,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:30,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:04:30,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:30,479 INFO L87 Difference]: Start difference. First operand 3010 states and 8869 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) [2021-05-03 14:04:30,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:30,634 INFO L93 Difference]: Finished difference Result 3214 states and 9207 transitions. [2021-05-03 14:04:30,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:04:30,634 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 [2021-05-03 14:04:30,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:30,638 INFO L225 Difference]: With dead ends: 3214 [2021-05-03 14:04:30,638 INFO L226 Difference]: Without dead ends: 3211 [2021-05-03 14:04:30,638 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 142.5ms TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:04:30,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2021-05-03 14:04:30,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 3017. [2021-05-03 14:04:30,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.9462864721485413) internal successors, (8886), 3016 states have internal predecessors, (8886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:30,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8886 transitions. [2021-05-03 14:04:30,674 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8886 transitions. Word has length 20 [2021-05-03 14:04:30,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:30,674 INFO L480 AbstractCegarLoop]: Abstraction has 3017 states and 8886 transitions. [2021-05-03 14:04:30,674 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) [2021-05-03 14:04:30,674 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8886 transitions. [2021-05-03 14:04:30,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:30,676 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:30,676 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:30,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable513,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:30,891 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:30,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:30,892 INFO L82 PathProgramCache]: Analyzing trace with hash -604354199, now seen corresponding path program 134 times [2021-05-03 14:04:30,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:30,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998166003] [2021-05-03 14:04:30,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:30,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:30,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998166003] [2021-05-03 14:04:30,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093688057] [2021-05-03 14:04:30,998 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 [2021-05-03 14:04:31,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:31,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:31,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:31,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:31,103 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:31,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:31,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2021-05-03 14:04:31,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900128298] [2021-05-03 14:04:31,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:04:31,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:31,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:04:31,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:31,104 INFO L87 Difference]: Start difference. First operand 3017 states and 8886 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) [2021-05-03 14:04:31,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:31,283 INFO L93 Difference]: Finished difference Result 3712 states and 10403 transitions. [2021-05-03 14:04:31,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:04:31,283 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 [2021-05-03 14:04:31,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:31,287 INFO L225 Difference]: With dead ends: 3712 [2021-05-03 14:04:31,287 INFO L226 Difference]: Without dead ends: 3709 [2021-05-03 14:04:31,287 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 153.6ms TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:04:31,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3709 states. [2021-05-03 14:04:31,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3709 to 3017. [2021-05-03 14:04:31,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.9449602122015914) internal successors, (8882), 3016 states have internal predecessors, (8882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:31,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8882 transitions. [2021-05-03 14:04:31,351 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8882 transitions. Word has length 20 [2021-05-03 14:04:31,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:31,351 INFO L480 AbstractCegarLoop]: Abstraction has 3017 states and 8882 transitions. [2021-05-03 14:04:31,352 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) [2021-05-03 14:04:31,352 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8882 transitions. [2021-05-03 14:04:31,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:31,354 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:31,354 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:31,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-05-03 14:04:31,580 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:31,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:31,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1047253339, now seen corresponding path program 135 times [2021-05-03 14:04:31,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:31,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030680886] [2021-05-03 14:04:31,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:31,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:31,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030680886] [2021-05-03 14:04:31,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001568896] [2021-05-03 14:04:31,657 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 [2021-05-03 14:04:31,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:04:31,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:31,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:31,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:04:31,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:31,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2021-05-03 14:04:31,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801984360] [2021-05-03 14:04:31,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:04:31,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:31,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:04:31,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:31,733 INFO L87 Difference]: Start difference. First operand 3017 states and 8882 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) [2021-05-03 14:04:31,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:31,871 INFO L93 Difference]: Finished difference Result 3583 states and 10063 transitions. [2021-05-03 14:04:31,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:04:31,871 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 [2021-05-03 14:04:31,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:31,875 INFO L225 Difference]: With dead ends: 3583 [2021-05-03 14:04:31,875 INFO L226 Difference]: Without dead ends: 3579 [2021-05-03 14:04:31,875 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 131.7ms TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:04:31,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3579 states. [2021-05-03 14:04:31,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3579 to 3017. [2021-05-03 14:04:31,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.944297082228117) internal successors, (8880), 3016 states have internal predecessors, (8880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:31,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8880 transitions. [2021-05-03 14:04:31,907 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8880 transitions. Word has length 20 [2021-05-03 14:04:31,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:31,907 INFO L480 AbstractCegarLoop]: Abstraction has 3017 states and 8880 transitions. [2021-05-03 14:04:31,907 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) [2021-05-03 14:04:31,907 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8880 transitions. [2021-05-03 14:04:31,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:31,909 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:31,909 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:32,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:32,121 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:32,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:32,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1892224791, now seen corresponding path program 136 times [2021-05-03 14:04:32,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:32,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541216507] [2021-05-03 14:04:32,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:32,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:32,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541216507] [2021-05-03 14:04:32,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065798905] [2021-05-03 14:04:32,193 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 [2021-05-03 14:04:32,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:32,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:32,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:32,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:32,273 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:32,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:32,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 16 [2021-05-03 14:04:32,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743670120] [2021-05-03 14:04:32,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:04:32,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:32,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:04:32,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:04:32,274 INFO L87 Difference]: Start difference. First operand 3017 states and 8880 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) [2021-05-03 14:04:32,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:32,414 INFO L93 Difference]: Finished difference Result 3595 states and 10071 transitions. [2021-05-03 14:04:32,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:04:32,414 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 20 [2021-05-03 14:04:32,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:32,418 INFO L225 Difference]: With dead ends: 3595 [2021-05-03 14:04:32,418 INFO L226 Difference]: Without dead ends: 3580 [2021-05-03 14:04:32,418 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 156.9ms TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:04:32,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3580 states. [2021-05-03 14:04:32,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3580 to 3038. [2021-05-03 14:04:32,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 2.9400724399078038) internal successors, (8929), 3037 states have internal predecessors, (8929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:32,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 8929 transitions. [2021-05-03 14:04:32,454 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 8929 transitions. Word has length 20 [2021-05-03 14:04:32,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:32,454 INFO L480 AbstractCegarLoop]: Abstraction has 3038 states and 8929 transitions. [2021-05-03 14:04:32,454 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) [2021-05-03 14:04:32,454 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 8929 transitions. [2021-05-03 14:04:32,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:32,456 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:32,456 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:32,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable516 [2021-05-03 14:04:32,656 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:32,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:32,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1978431269, now seen corresponding path program 137 times [2021-05-03 14:04:32,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:32,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921664045] [2021-05-03 14:04:32,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:32,759 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:32,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921664045] [2021-05-03 14:04:32,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777623375] [2021-05-03 14:04:32,760 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) [2021-05-03 14:04:32,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:04:32,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:32,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:32,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:32,893 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:32,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:32,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 16 [2021-05-03 14:04:32,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605421606] [2021-05-03 14:04:32,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:04:32,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:32,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:04:32,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:04:32,894 INFO L87 Difference]: Start difference. First operand 3038 states and 8929 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) [2021-05-03 14:04:33,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:33,033 INFO L93 Difference]: Finished difference Result 3383 states and 9628 transitions. [2021-05-03 14:04:33,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:04:33,033 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 20 [2021-05-03 14:04:33,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:33,038 INFO L225 Difference]: With dead ends: 3383 [2021-05-03 14:04:33,038 INFO L226 Difference]: Without dead ends: 3377 [2021-05-03 14:04:33,039 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 186.3ms TimeCoverageRelationStatistics Valid=184, Invalid=466, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:04:33,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3377 states. [2021-05-03 14:04:33,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3377 to 3038. [2021-05-03 14:04:33,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 2.939743167599605) internal successors, (8928), 3037 states have internal predecessors, (8928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:33,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 8928 transitions. [2021-05-03 14:04:33,074 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 8928 transitions. Word has length 20 [2021-05-03 14:04:33,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:33,074 INFO L480 AbstractCegarLoop]: Abstraction has 3038 states and 8928 transitions. [2021-05-03 14:04:33,074 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) [2021-05-03 14:04:33,074 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 8928 transitions. [2021-05-03 14:04:33,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:33,077 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:33,077 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:33,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:33,292 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:33,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:33,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1709684841, now seen corresponding path program 138 times [2021-05-03 14:04:33,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:33,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506420425] [2021-05-03 14:04:33,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:33,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:33,378 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:33,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506420425] [2021-05-03 14:04:33,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587691895] [2021-05-03 14:04:33,378 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) [2021-05-03 14:04:33,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:04:33,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:33,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 14:04:33,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:33,460 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 42 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:33,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:33,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 17 [2021-05-03 14:04:33,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257562443] [2021-05-03 14:04:33,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:04:33,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:33,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:04:33,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:04:33,462 INFO L87 Difference]: Start difference. First operand 3038 states and 8928 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) [2021-05-03 14:04:33,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:33,610 INFO L93 Difference]: Finished difference Result 3346 states and 9565 transitions. [2021-05-03 14:04:33,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:04:33,610 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 [2021-05-03 14:04:33,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:33,613 INFO L225 Difference]: With dead ends: 3346 [2021-05-03 14:04:33,613 INFO L226 Difference]: Without dead ends: 3339 [2021-05-03 14:04:33,614 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 180.2ms TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:04:33,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2021-05-03 14:04:33,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 3038. [2021-05-03 14:04:33,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 2.939413895291406) internal successors, (8927), 3037 states have internal predecessors, (8927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:33,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 8927 transitions. [2021-05-03 14:04:33,647 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 8927 transitions. Word has length 20 [2021-05-03 14:04:33,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:33,647 INFO L480 AbstractCegarLoop]: Abstraction has 3038 states and 8927 transitions. [2021-05-03 14:04:33,647 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) [2021-05-03 14:04:33,647 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 8927 transitions. [2021-05-03 14:04:33,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:04:33,650 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:33,650 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:33,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable518 [2021-05-03 14:04:33,865 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:33,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:33,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1876737230, now seen corresponding path program 139 times [2021-05-03 14:04:33,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:33,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893565082] [2021-05-03 14:04:33,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:33,944 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:33,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893565082] [2021-05-03 14:04:33,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144411946] [2021-05-03 14:04:33,944 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 [2021-05-03 14:04:33,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:33,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:04:33,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:34,345 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-05-03 14:04:34,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:34,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-05-03 14:04:36,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:36,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:36,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:36,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-05-03 14:04:36,250 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:36,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:36,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-05-03 14:04:36,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406504712] [2021-05-03 14:04:36,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:04:36,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:36,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:04:36,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:04:36,251 INFO L87 Difference]: Start difference. First operand 3038 states and 8927 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 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) [2021-05-03 14:04:36,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:36,491 INFO L93 Difference]: Finished difference Result 3126 states and 9098 transitions. [2021-05-03 14:04:36,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:04:36,491 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 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 [2021-05-03 14:04:36,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:36,495 INFO L225 Difference]: With dead ends: 3126 [2021-05-03 14:04:36,495 INFO L226 Difference]: Without dead ends: 3123 [2021-05-03 14:04:36,495 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 226.9ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:04:36,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3123 states. [2021-05-03 14:04:36,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3123 to 3077. [2021-05-03 14:04:36,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3077 states, 3076 states have (on average 2.935305591677503) internal successors, (9029), 3076 states have internal predecessors, (9029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:36,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3077 states to 3077 states and 9029 transitions. [2021-05-03 14:04:36,526 INFO L78 Accepts]: Start accepts. Automaton has 3077 states and 9029 transitions. Word has length 21 [2021-05-03 14:04:36,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:36,526 INFO L480 AbstractCegarLoop]: Abstraction has 3077 states and 9029 transitions. [2021-05-03 14:04:36,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 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) [2021-05-03 14:04:36,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3077 states and 9029 transitions. [2021-05-03 14:04:36,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:04:36,528 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:36,528 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:36,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:36,745 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:36,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:36,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1748440654, now seen corresponding path program 140 times [2021-05-03 14:04:36,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:36,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901985174] [2021-05-03 14:04:36,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:36,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:36,827 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:36,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901985174] [2021-05-03 14:04:36,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516038170] [2021-05-03 14:04:36,827 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 [2021-05-03 14:04:36,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:36,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:36,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:04:36,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:37,210 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-05-03 14:04:37,210 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:37,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-05-03 14:04:39,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:39,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:39,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:39,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-05-03 14:04:39,134 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:39,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:39,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-05-03 14:04:39,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648138584] [2021-05-03 14:04:39,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:04:39,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:39,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:04:39,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:04:39,134 INFO L87 Difference]: Start difference. First operand 3077 states and 9029 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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) [2021-05-03 14:04:39,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:39,355 INFO L93 Difference]: Finished difference Result 3204 states and 9307 transitions. [2021-05-03 14:04:39,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:04:39,355 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 [2021-05-03 14:04:39,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:39,358 INFO L225 Difference]: With dead ends: 3204 [2021-05-03 14:04:39,358 INFO L226 Difference]: Without dead ends: 3200 [2021-05-03 14:04:39,359 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 228.4ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:04:39,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3200 states. [2021-05-03 14:04:39,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3200 to 3145. [2021-05-03 14:04:39,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3145 states, 3144 states have (on average 2.931933842239186) internal successors, (9218), 3144 states have internal predecessors, (9218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:39,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3145 states to 3145 states and 9218 transitions. [2021-05-03 14:04:39,393 INFO L78 Accepts]: Start accepts. Automaton has 3145 states and 9218 transitions. Word has length 21 [2021-05-03 14:04:39,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:39,393 INFO L480 AbstractCegarLoop]: Abstraction has 3145 states and 9218 transitions. [2021-05-03 14:04:39,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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) [2021-05-03 14:04:39,393 INFO L276 IsEmpty]: Start isEmpty. Operand 3145 states and 9218 transitions. [2021-05-03 14:04:39,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:04:39,395 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:39,395 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:39,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1071 [2021-05-03 14:04:39,610 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:39,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:39,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1114512810, now seen corresponding path program 141 times [2021-05-03 14:04:39,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:39,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408714606] [2021-05-03 14:04:39,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:39,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:39,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408714606] [2021-05-03 14:04:39,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633351357] [2021-05-03 14:04:39,679 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 [2021-05-03 14:04:39,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:04:39,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:39,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:04:39,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:40,080 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-05-03 14:04:40,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:40,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-05-03 14:04:42,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:42,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:42,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:42,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-05-03 14:04:42,840 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:42,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:42,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-05-03 14:04:42,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389920880] [2021-05-03 14:04:42,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:04:42,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:42,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:04:42,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:04:42,841 INFO L87 Difference]: Start difference. First operand 3145 states and 9218 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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) [2021-05-03 14:04:43,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:43,053 INFO L93 Difference]: Finished difference Result 3276 states and 9505 transitions. [2021-05-03 14:04:43,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:04:43,054 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 [2021-05-03 14:04:43,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:43,058 INFO L225 Difference]: With dead ends: 3276 [2021-05-03 14:04:43,058 INFO L226 Difference]: Without dead ends: 3272 [2021-05-03 14:04:43,058 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 242.4ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:04:43,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2021-05-03 14:04:43,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 3208. [2021-05-03 14:04:43,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3208 states, 3207 states have (on average 2.9307764265668848) internal successors, (9399), 3207 states have internal predecessors, (9399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:43,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3208 states to 3208 states and 9399 transitions. [2021-05-03 14:04:43,107 INFO L78 Accepts]: Start accepts. Automaton has 3208 states and 9399 transitions. Word has length 21 [2021-05-03 14:04:43,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:43,108 INFO L480 AbstractCegarLoop]: Abstraction has 3208 states and 9399 transitions. [2021-05-03 14:04:43,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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) [2021-05-03 14:04:43,108 INFO L276 IsEmpty]: Start isEmpty. Operand 3208 states and 9399 transitions. [2021-05-03 14:04:43,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:04:43,111 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:43,111 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:43,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1597 [2021-05-03 14:04:43,313 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:43,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:43,313 INFO L82 PathProgramCache]: Analyzing trace with hash -328243022, now seen corresponding path program 142 times [2021-05-03 14:04:43,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:43,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925012026] [2021-05-03 14:04:43,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:04:43,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925012026] [2021-05-03 14:04:43,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031353594] [2021-05-03 14:04:43,373 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 [2021-05-03 14:04:43,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:43,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:43,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:04:43,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:43,728 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-05-03 14:04:43,729 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:43,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-05-03 14:04:46,078 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 1612 DAG size of output: 928 [2021-05-03 14:04:46,274 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 1612 DAG size of output: 928 [2021-05-03 14:04:46,439 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 1621 DAG size of output: 937 [2021-05-03 14:04:47,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:47,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:47,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:47,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-05-03 14:04:47,823 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:47,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:47,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-05-03 14:04:47,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222509902] [2021-05-03 14:04:47,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:04:47,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:47,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:04:47,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:04:47,824 INFO L87 Difference]: Start difference. First operand 3208 states and 9399 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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) [2021-05-03 14:04:47,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:47,971 INFO L93 Difference]: Finished difference Result 3340 states and 9684 transitions. [2021-05-03 14:04:47,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:04:47,972 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 [2021-05-03 14:04:47,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:47,976 INFO L225 Difference]: With dead ends: 3340 [2021-05-03 14:04:47,976 INFO L226 Difference]: Without dead ends: 3336 [2021-05-03 14:04:47,976 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 215.5ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:04:47,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-05-03 14:04:48,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 3260. [2021-05-03 14:04:48,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3260 states, 3259 states have (on average 2.933722000613685) internal successors, (9561), 3259 states have internal predecessors, (9561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:48,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3260 states to 3260 states and 9561 transitions. [2021-05-03 14:04:48,007 INFO L78 Accepts]: Start accepts. Automaton has 3260 states and 9561 transitions. Word has length 21 [2021-05-03 14:04:48,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:48,007 INFO L480 AbstractCegarLoop]: Abstraction has 3260 states and 9561 transitions. [2021-05-03 14:04:48,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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) [2021-05-03 14:04:48,007 INFO L276 IsEmpty]: Start isEmpty. Operand 3260 states and 9561 transitions. [2021-05-03 14:04:48,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:04:48,009 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:48,009 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:48,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2575 [2021-05-03 14:04:48,210 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:48,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:48,210 INFO L82 PathProgramCache]: Analyzing trace with hash -2104000854, now seen corresponding path program 143 times [2021-05-03 14:04:48,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:48,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650482978] [2021-05-03 14:04:48,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:48,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650482978] [2021-05-03 14:04:48,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694017995] [2021-05-03 14:04:48,265 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 [2021-05-03 14:04:48,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:04:48,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:48,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:04:48,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:48,639 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-05-03 14:04:48,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:48,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-05-03 14:04:50,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:50,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:50,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:50,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-05-03 14:04:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:50,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:50,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-05-03 14:04:50,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624623169] [2021-05-03 14:04:50,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:04:50,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:50,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:04:50,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:04:50,752 INFO L87 Difference]: Start difference. First operand 3260 states and 9561 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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) [2021-05-03 14:04:50,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:50,945 INFO L93 Difference]: Finished difference Result 3397 states and 9873 transitions. [2021-05-03 14:04:50,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:04:50,945 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 [2021-05-03 14:04:50,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:50,948 INFO L225 Difference]: With dead ends: 3397 [2021-05-03 14:04:50,948 INFO L226 Difference]: Without dead ends: 3392 [2021-05-03 14:04:50,948 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 227.8ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:04:50,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3392 states. [2021-05-03 14:04:50,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3392 to 3328. [2021-05-03 14:04:50,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3327 states have (on average 2.935076645626691) internal successors, (9765), 3327 states have internal predecessors, (9765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:50,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 9765 transitions. [2021-05-03 14:04:50,995 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 9765 transitions. Word has length 21 [2021-05-03 14:04:50,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:50,995 INFO L480 AbstractCegarLoop]: Abstraction has 3328 states and 9765 transitions. [2021-05-03 14:04:50,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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) [2021-05-03 14:04:50,995 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 9765 transitions. [2021-05-03 14:04:50,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:04:50,997 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:50,997 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:51,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3503 [2021-05-03 14:04:51,198 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:51,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:51,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1317918798, now seen corresponding path program 144 times [2021-05-03 14:04:51,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:51,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434842785] [2021-05-03 14:04:51,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:51,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:51,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434842785] [2021-05-03 14:04:51,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592064791] [2021-05-03 14:04:51,255 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 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 [2021-05-03 14:04:51,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:04:51,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:51,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:04:51,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:51,581 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-05-03 14:04:51,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:51,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-05-03 14:04:52,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:52,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:52,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:52,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-05-03 14:04:52,566 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:52,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:52,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-05-03 14:04:52,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733828178] [2021-05-03 14:04:52,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:04:52,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:52,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:04:52,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:04:52,567 INFO L87 Difference]: Start difference. First operand 3328 states and 9765 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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) [2021-05-03 14:04:52,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:52,813 INFO L93 Difference]: Finished difference Result 3484 states and 10127 transitions. [2021-05-03 14:04:52,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:04:52,813 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 [2021-05-03 14:04:52,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:52,817 INFO L225 Difference]: With dead ends: 3484 [2021-05-03 14:04:52,817 INFO L226 Difference]: Without dead ends: 3480 [2021-05-03 14:04:52,817 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 198.6ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:04:52,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2021-05-03 14:04:52,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3406. [2021-05-03 14:04:52,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3406 states, 3405 states have (on average 2.9392070484581496) internal successors, (10008), 3405 states have internal predecessors, (10008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:52,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3406 states to 3406 states and 10008 transitions. [2021-05-03 14:04:52,852 INFO L78 Accepts]: Start accepts. Automaton has 3406 states and 10008 transitions. Word has length 21 [2021-05-03 14:04:52,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:52,852 INFO L480 AbstractCegarLoop]: Abstraction has 3406 states and 10008 transitions. [2021-05-03 14:04:52,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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) [2021-05-03 14:04:52,852 INFO L276 IsEmpty]: Start isEmpty. Operand 3406 states and 10008 transitions. [2021-05-03 14:04:52,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:04:52,855 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:52,855 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:53,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4061,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:53,056 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:53,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:53,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1575788458, now seen corresponding path program 145 times [2021-05-03 14:04:53,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:53,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588680910] [2021-05-03 14:04:53,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:04:53,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588680910] [2021-05-03 14:04:53,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563868534] [2021-05-03 14:04:53,115 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 [2021-05-03 14:04:53,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:53,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:04:53,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:53,498 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-05-03 14:04:53,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:53,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-05-03 14:04:54,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:54,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:54,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:54,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-05-03 14:04:54,396 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:54,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:54,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-05-03 14:04:54,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514920434] [2021-05-03 14:04:54,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:04:54,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:54,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:04:54,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:04:54,397 INFO L87 Difference]: Start difference. First operand 3406 states and 10008 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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) [2021-05-03 14:04:54,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:54,574 INFO L93 Difference]: Finished difference Result 3580 states and 10428 transitions. [2021-05-03 14:04:54,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:04:54,575 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 [2021-05-03 14:04:54,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:54,579 INFO L225 Difference]: With dead ends: 3580 [2021-05-03 14:04:54,579 INFO L226 Difference]: Without dead ends: 3576 [2021-05-03 14:04:54,579 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 225.5ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:04:54,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3576 states. [2021-05-03 14:04:54,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3576 to 3502. [2021-05-03 14:04:54,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3502 states, 3501 states have (on average 2.9460154241645244) internal successors, (10314), 3501 states have internal predecessors, (10314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:54,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3502 states to 3502 states and 10314 transitions. [2021-05-03 14:04:54,617 INFO L78 Accepts]: Start accepts. Automaton has 3502 states and 10314 transitions. Word has length 21 [2021-05-03 14:04:54,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:54,617 INFO L480 AbstractCegarLoop]: Abstraction has 3502 states and 10314 transitions. [2021-05-03 14:04:54,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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) [2021-05-03 14:04:54,617 INFO L276 IsEmpty]: Start isEmpty. Operand 3502 states and 10314 transitions. [2021-05-03 14:04:54,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:04:54,620 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:54,620 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:54,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4386 [2021-05-03 14:04:54,829 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:54,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:54,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1086400178, now seen corresponding path program 146 times [2021-05-03 14:04:54,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:54,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148044423] [2021-05-03 14:04:54,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:54,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:54,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148044423] [2021-05-03 14:04:54,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902958765] [2021-05-03 14:04:54,887 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) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:54,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:54,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:54,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:04:54,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:55,260 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-05-03 14:04:55,260 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:55,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-05-03 14:04:56,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:56,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:56,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:56,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-05-03 14:04:56,396 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:56,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:56,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-05-03 14:04:56,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903592290] [2021-05-03 14:04:56,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:04:56,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:56,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:04:56,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:04:56,396 INFO L87 Difference]: Start difference. First operand 3502 states and 10314 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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) [2021-05-03 14:04:56,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:56,683 INFO L93 Difference]: Finished difference Result 3937 states and 11542 transitions. [2021-05-03 14:04:56,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:04:56,684 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 [2021-05-03 14:04:56,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:56,687 INFO L225 Difference]: With dead ends: 3937 [2021-05-03 14:04:56,687 INFO L226 Difference]: Without dead ends: 3934 [2021-05-03 14:04:56,687 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 241.6ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:04:56,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3934 states. [2021-05-03 14:04:56,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3934 to 3870. [2021-05-03 14:04:56,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3870 states, 3869 states have (on average 2.9581287154303437) internal successors, (11445), 3869 states have internal predecessors, (11445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:56,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 11445 transitions. [2021-05-03 14:04:56,726 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 11445 transitions. Word has length 21 [2021-05-03 14:04:56,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:56,727 INFO L480 AbstractCegarLoop]: Abstraction has 3870 states and 11445 transitions. [2021-05-03 14:04:56,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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) [2021-05-03 14:04:56,727 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 11445 transitions. [2021-05-03 14:04:56,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:04:56,729 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:56,730 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:56,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4797,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:56,930 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:56,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:56,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1199734614, now seen corresponding path program 147 times [2021-05-03 14:04:56,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:56,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942547403] [2021-05-03 14:04:56,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:56,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:56,989 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:56,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942547403] [2021-05-03 14:04:56,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706136191] [2021-05-03 14:04:56,989 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 [2021-05-03 14:04:57,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:04:57,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:57,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:04:57,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:57,329 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-05-03 14:04:57,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:57,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-05-03 14:05:01,629 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 2305 DAG size of output: 1697 [2021-05-03 14:05:01,824 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 2314 DAG size of output: 1681 [2021-05-03 14:05:02,031 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 2482 DAG size of output: 1836 [2021-05-03 14:05:02,281 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 2499 DAG size of output: 1849 [2021-05-03 14:05:02,519 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 2591 DAG size of output: 1909 [2021-05-03 14:05:02,761 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 2591 DAG size of output: 1909 [2021-05-03 14:05:03,050 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 2600 DAG size of output: 1918 [2021-05-03 14:05:03,215 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 1918 DAG size of output: 1874 [2021-05-03 14:05:03,484 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 1794 DAG size of output: 2603 [2021-05-03 14:05:03,647 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 1766 DAG size of output: 1632 [2021-05-03 14:05:03,864 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 1625 DAG size of output: 1606 [2021-05-03 14:05:04,065 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1590 DAG size of output: 1590 [2021-05-03 14:05:04,757 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 1440 DAG size of output: 1970 [2021-05-03 14:05:04,970 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 1362 DAG size of output: 1601 [2021-05-03 14:05:05,095 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 1254 DAG size of output: 1242 [2021-05-03 14:05:07,202 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 3238 DAG size of output: 1088 [2021-05-03 14:05:09,024 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 4072 DAG size of output: 1488 [2021-05-03 14:05:09,247 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 4072 DAG size of output: 1488 [2021-05-03 14:05:09,440 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 4076 DAG size of output: 1492 [2021-05-03 14:05:09,592 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 1494 DAG size of output: 1390 [2021-05-03 14:05:10,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:10,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:10,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:10,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-05-03 14:05:10,346 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:10,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:10,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-05-03 14:05:10,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660939906] [2021-05-03 14:05:10,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:05:10,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:10,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:05:10,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:05:10,346 INFO L87 Difference]: Start difference. First operand 3870 states and 11445 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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) [2021-05-03 14:05:10,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:10,568 INFO L93 Difference]: Finished difference Result 4316 states and 12694 transitions. [2021-05-03 14:05:10,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:05:10,569 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 [2021-05-03 14:05:10,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:10,578 INFO L225 Difference]: With dead ends: 4316 [2021-05-03 14:05:10,578 INFO L226 Difference]: Without dead ends: 4313 [2021-05-03 14:05:10,579 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 206.1ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:05:10,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4313 states. [2021-05-03 14:05:10,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4313 to 4248. [2021-05-03 14:05:10,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4248 states, 4247 states have (on average 2.9684483164586766) internal successors, (12607), 4247 states have internal predecessors, (12607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:10,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4248 states to 4248 states and 12607 transitions. [2021-05-03 14:05:10,624 INFO L78 Accepts]: Start accepts. Automaton has 4248 states and 12607 transitions. Word has length 21 [2021-05-03 14:05:10,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:10,624 INFO L480 AbstractCegarLoop]: Abstraction has 4248 states and 12607 transitions. [2021-05-03 14:05:10,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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) [2021-05-03 14:05:10,624 INFO L276 IsEmpty]: Start isEmpty. Operand 4248 states and 12607 transitions. [2021-05-03 14:05:10,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:05:10,627 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:10,627 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:10,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5305,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:10,828 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:10,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:10,828 INFO L82 PathProgramCache]: Analyzing trace with hash 944530866, now seen corresponding path program 148 times [2021-05-03 14:05:10,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:10,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3169215] [2021-05-03 14:05:10,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:10,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:10,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3169215] [2021-05-03 14:05:10,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146207441] [2021-05-03 14:05:10,884 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:10,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:10,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:10,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:10,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:11,215 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-05-03 14:05:11,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:11,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-05-03 14:05:14,580 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 1858 DAG size of output: 1269 [2021-05-03 14:05:16,852 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 1484 DAG size of output: 1222 [2021-05-03 14:05:17,003 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 1652 DAG size of output: 1381 [2021-05-03 14:05:17,311 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 3032 DAG size of output: 2343 [2021-05-03 14:05:17,654 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 3032 DAG size of output: 2343 [2021-05-03 14:05:17,973 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 3038 DAG size of output: 2349 [2021-05-03 14:05:18,141 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 2349 DAG size of output: 1855 [2021-05-03 14:05:18,312 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 1297 DAG size of output: 1672 [2021-05-03 14:05:18,897 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 1113 DAG size of output: 1200 [2021-05-03 14:05:20,706 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 1005 DAG size of output: 1134 [2021-05-03 14:05:21,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:21,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:21,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:21,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-05-03 14:05:21,108 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:21,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:21,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-05-03 14:05:21,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039338320] [2021-05-03 14:05:21,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:05:21,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:21,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:05:21,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:05:21,109 INFO L87 Difference]: Start difference. First operand 4248 states and 12607 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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) [2021-05-03 14:05:21,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:21,371 INFO L93 Difference]: Finished difference Result 4620 states and 13625 transitions. [2021-05-03 14:05:21,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:05:21,372 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 [2021-05-03 14:05:21,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:21,377 INFO L225 Difference]: With dead ends: 4620 [2021-05-03 14:05:21,377 INFO L226 Difference]: Without dead ends: 4617 [2021-05-03 14:05:21,377 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 206.1ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:05:21,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4617 states. [2021-05-03 14:05:21,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4617 to 4548. [2021-05-03 14:05:21,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4548 states, 4547 states have (on average 2.9762480756542775) internal successors, (13533), 4547 states have internal predecessors, (13533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:21,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4548 states to 4548 states and 13533 transitions. [2021-05-03 14:05:21,422 INFO L78 Accepts]: Start accepts. Automaton has 4548 states and 13533 transitions. Word has length 21 [2021-05-03 14:05:21,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:21,422 INFO L480 AbstractCegarLoop]: Abstraction has 4548 states and 13533 transitions. [2021-05-03 14:05:21,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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) [2021-05-03 14:05:21,423 INFO L276 IsEmpty]: Start isEmpty. Operand 4548 states and 13533 transitions. [2021-05-03 14:05:21,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:21,426 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:21,426 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:21,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8218,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:21,627 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:21,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:21,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1973759689, now seen corresponding path program 149 times [2021-05-03 14:05:21,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:21,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286167783] [2021-05-03 14:05:21,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:21,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:21,721 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:21,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286167783] [2021-05-03 14:05:21,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124476019] [2021-05-03 14:05:21,722 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 [2021-05-03 14:05:21,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:05:21,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:21,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:21,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:21,789 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:21,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:21,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:05:21,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904668505] [2021-05-03 14:05:21,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:05:21,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:21,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:05:21,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:05:21,790 INFO L87 Difference]: Start difference. First operand 4548 states and 13533 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) [2021-05-03 14:05:22,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:22,117 INFO L93 Difference]: Finished difference Result 4872 states and 14053 transitions. [2021-05-03 14:05:22,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 14:05:22,117 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 [2021-05-03 14:05:22,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:22,121 INFO L225 Difference]: With dead ends: 4872 [2021-05-03 14:05:22,122 INFO L226 Difference]: Without dead ends: 4863 [2021-05-03 14:05:22,122 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 284.1ms TimeCoverageRelationStatistics Valid=423, Invalid=837, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 14:05:22,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4863 states. [2021-05-03 14:05:22,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4863 to 4581. [2021-05-03 14:05:22,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4581 states, 4580 states have (on average 2.9753275109170305) internal successors, (13627), 4580 states have internal predecessors, (13627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:22,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4581 states to 4581 states and 13627 transitions. [2021-05-03 14:05:22,174 INFO L78 Accepts]: Start accepts. Automaton has 4581 states and 13627 transitions. Word has length 22 [2021-05-03 14:05:22,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:22,175 INFO L480 AbstractCegarLoop]: Abstraction has 4581 states and 13627 transitions. [2021-05-03 14:05:22,175 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) [2021-05-03 14:05:22,175 INFO L276 IsEmpty]: Start isEmpty. Operand 4581 states and 13627 transitions. [2021-05-03 14:05:22,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:22,178 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:22,178 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:22,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10446 [2021-05-03 14:05:22,379 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:22,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:22,379 INFO L82 PathProgramCache]: Analyzing trace with hash 510781845, now seen corresponding path program 150 times [2021-05-03 14:05:22,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:22,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018692734] [2021-05-03 14:05:22,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:22,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:22,443 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:22,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018692734] [2021-05-03 14:05:22,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836362149] [2021-05-03 14:05:22,444 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 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 [2021-05-03 14:05:22,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:05:22,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:22,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:22,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:22,503 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:22,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:22,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:05:22,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710949296] [2021-05-03 14:05:22,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:22,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:22,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:22,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:22,504 INFO L87 Difference]: Start difference. First operand 4581 states and 13627 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) [2021-05-03 14:05:22,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:22,581 INFO L93 Difference]: Finished difference Result 5002 states and 14452 transitions. [2021-05-03 14:05:22,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:05:22,581 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 [2021-05-03 14:05:22,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:22,586 INFO L225 Difference]: With dead ends: 5002 [2021-05-03 14:05:22,586 INFO L226 Difference]: Without dead ends: 5002 [2021-05-03 14:05:22,586 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:22,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5002 states. [2021-05-03 14:05:22,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5002 to 4539. [2021-05-03 14:05:22,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4539 states, 4538 states have (on average 2.9726751873071837) internal successors, (13490), 4538 states have internal predecessors, (13490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:22,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4539 states to 4539 states and 13490 transitions. [2021-05-03 14:05:22,636 INFO L78 Accepts]: Start accepts. Automaton has 4539 states and 13490 transitions. Word has length 22 [2021-05-03 14:05:22,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:22,636 INFO L480 AbstractCegarLoop]: Abstraction has 4539 states and 13490 transitions. [2021-05-03 14:05:22,636 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) [2021-05-03 14:05:22,636 INFO L276 IsEmpty]: Start isEmpty. Operand 4539 states and 13490 transitions. [2021-05-03 14:05:22,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:22,639 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:22,639 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:22,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10447 [2021-05-03 14:05:22,840 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:22,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:22,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1655986249, now seen corresponding path program 151 times [2021-05-03 14:05:22,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:22,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19839322] [2021-05-03 14:05:22,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:22,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:22,919 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:22,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19839322] [2021-05-03 14:05:22,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143367895] [2021-05-03 14:05:22,919 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 [2021-05-03 14:05:22,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:22,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:22,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:22,976 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:22,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:22,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:05:22,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374231801] [2021-05-03 14:05:22,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:22,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:22,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:22,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:22,977 INFO L87 Difference]: Start difference. First operand 4539 states and 13490 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) [2021-05-03 14:05:23,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:23,126 INFO L93 Difference]: Finished difference Result 4827 states and 13939 transitions. [2021-05-03 14:05:23,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:05:23,127 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 [2021-05-03 14:05:23,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:23,131 INFO L225 Difference]: With dead ends: 4827 [2021-05-03 14:05:23,131 INFO L226 Difference]: Without dead ends: 4825 [2021-05-03 14:05:23,131 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 124.9ms TimeCoverageRelationStatistics Valid=209, Invalid=343, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:05:23,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4825 states. [2021-05-03 14:05:23,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4825 to 4570. [2021-05-03 14:05:23,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4570 states, 4569 states have (on average 2.9739549135478223) internal successors, (13588), 4569 states have internal predecessors, (13588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:23,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4570 states to 4570 states and 13588 transitions. [2021-05-03 14:05:23,184 INFO L78 Accepts]: Start accepts. Automaton has 4570 states and 13588 transitions. Word has length 22 [2021-05-03 14:05:23,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:23,184 INFO L480 AbstractCegarLoop]: Abstraction has 4570 states and 13588 transitions. [2021-05-03 14:05:23,184 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) [2021-05-03 14:05:23,184 INFO L276 IsEmpty]: Start isEmpty. Operand 4570 states and 13588 transitions. [2021-05-03 14:05:23,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:23,187 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:23,187 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:23,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10448,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:23,388 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:23,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:23,388 INFO L82 PathProgramCache]: Analyzing trace with hash -921231987, now seen corresponding path program 152 times [2021-05-03 14:05:23,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:23,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366929119] [2021-05-03 14:05:23,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:23,450 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:23,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366929119] [2021-05-03 14:05:23,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356818181] [2021-05-03 14:05:23,451 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 [2021-05-03 14:05:23,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:23,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:23,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:23,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:23,514 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:23,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:23,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:05:23,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61047438] [2021-05-03 14:05:23,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:23,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:23,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:23,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:23,515 INFO L87 Difference]: Start difference. First operand 4570 states and 13588 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) [2021-05-03 14:05:23,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:23,580 INFO L93 Difference]: Finished difference Result 5088 states and 14673 transitions. [2021-05-03 14:05:23,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:05:23,581 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 [2021-05-03 14:05:23,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:23,585 INFO L225 Difference]: With dead ends: 5088 [2021-05-03 14:05:23,585 INFO L226 Difference]: Without dead ends: 5088 [2021-05-03 14:05:23,585 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:23,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5088 states. [2021-05-03 14:05:23,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5088 to 4572. [2021-05-03 14:05:23,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4572 states, 4571 states have (on average 2.9739663093415007) internal successors, (13594), 4571 states have internal predecessors, (13594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:23,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4572 states to 4572 states and 13594 transitions. [2021-05-03 14:05:23,636 INFO L78 Accepts]: Start accepts. Automaton has 4572 states and 13594 transitions. Word has length 22 [2021-05-03 14:05:23,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:23,637 INFO L480 AbstractCegarLoop]: Abstraction has 4572 states and 13594 transitions. [2021-05-03 14:05:23,637 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) [2021-05-03 14:05:23,637 INFO L276 IsEmpty]: Start isEmpty. Operand 4572 states and 13594 transitions. [2021-05-03 14:05:23,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:23,640 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:23,640 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:23,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10449,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:23,841 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:23,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:23,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1644687975, now seen corresponding path program 153 times [2021-05-03 14:05:23,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:23,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416520665] [2021-05-03 14:05:23,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:23,916 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:23,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416520665] [2021-05-03 14:05:23,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153379140] [2021-05-03 14:05:23,916 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 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 [2021-05-03 14:05:23,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:05:23,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:23,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:23,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:23,999 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:24,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:24,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:24,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625476832] [2021-05-03 14:05:24,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:24,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:24,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:24,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:24,000 INFO L87 Difference]: Start difference. First operand 4572 states and 13594 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) [2021-05-03 14:05:24,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:24,083 INFO L93 Difference]: Finished difference Result 5431 states and 15640 transitions. [2021-05-03 14:05:24,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:05:24,084 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 [2021-05-03 14:05:24,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:24,088 INFO L225 Difference]: With dead ends: 5431 [2021-05-03 14:05:24,088 INFO L226 Difference]: Without dead ends: 5431 [2021-05-03 14:05:24,089 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:24,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5431 states. [2021-05-03 14:05:24,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5431 to 4529. [2021-05-03 14:05:24,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4529 states, 4528 states have (on average 2.9712897526501765) internal successors, (13454), 4528 states have internal predecessors, (13454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:24,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4529 states to 4529 states and 13454 transitions. [2021-05-03 14:05:24,139 INFO L78 Accepts]: Start accepts. Automaton has 4529 states and 13454 transitions. Word has length 22 [2021-05-03 14:05:24,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:24,139 INFO L480 AbstractCegarLoop]: Abstraction has 4529 states and 13454 transitions. [2021-05-03 14:05:24,139 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) [2021-05-03 14:05:24,139 INFO L276 IsEmpty]: Start isEmpty. Operand 4529 states and 13454 transitions. [2021-05-03 14:05:24,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:24,142 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:24,142 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:24,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10450,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:24,343 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:24,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:24,343 INFO L82 PathProgramCache]: Analyzing trace with hash 213230417, now seen corresponding path program 154 times [2021-05-03 14:05:24,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:24,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972351752] [2021-05-03 14:05:24,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:24,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:24,427 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:24,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972351752] [2021-05-03 14:05:24,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818725756] [2021-05-03 14:05:24,427 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 [2021-05-03 14:05:24,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:24,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:24,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:24,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:24,482 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:24,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:24,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:05:24,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189218288] [2021-05-03 14:05:24,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:24,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:24,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:24,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:24,482 INFO L87 Difference]: Start difference. First operand 4529 states and 13454 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) [2021-05-03 14:05:24,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:24,647 INFO L93 Difference]: Finished difference Result 4816 states and 13905 transitions. [2021-05-03 14:05:24,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:05:24,647 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 [2021-05-03 14:05:24,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:24,653 INFO L225 Difference]: With dead ends: 4816 [2021-05-03 14:05:24,653 INFO L226 Difference]: Without dead ends: 4814 [2021-05-03 14:05:24,653 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 148.9ms TimeCoverageRelationStatistics Valid=208, Invalid=344, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:05:24,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4814 states. [2021-05-03 14:05:24,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4814 to 4562. [2021-05-03 14:05:24,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4562 states, 4561 states have (on average 2.9723744792808593) internal successors, (13557), 4561 states have internal predecessors, (13557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:24,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4562 states to 4562 states and 13557 transitions. [2021-05-03 14:05:24,708 INFO L78 Accepts]: Start accepts. Automaton has 4562 states and 13557 transitions. Word has length 22 [2021-05-03 14:05:24,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:24,708 INFO L480 AbstractCegarLoop]: Abstraction has 4562 states and 13557 transitions. [2021-05-03 14:05:24,708 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) [2021-05-03 14:05:24,708 INFO L276 IsEmpty]: Start isEmpty. Operand 4562 states and 13557 transitions. [2021-05-03 14:05:24,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:24,711 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:24,711 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:24,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10451,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:24,918 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:24,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:24,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1930979477, now seen corresponding path program 155 times [2021-05-03 14:05:24,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:24,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477573035] [2021-05-03 14:05:24,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:24,981 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:24,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477573035] [2021-05-03 14:05:24,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556775415] [2021-05-03 14:05:24,982 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 [2021-05-03 14:05:25,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:05:25,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:25,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:25,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:25,053 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:25,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:25,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:05:25,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783345563] [2021-05-03 14:05:25,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:25,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:25,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:25,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:25,053 INFO L87 Difference]: Start difference. First operand 4562 states and 13557 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) [2021-05-03 14:05:25,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:25,121 INFO L93 Difference]: Finished difference Result 5117 states and 14760 transitions. [2021-05-03 14:05:25,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:05:25,122 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 [2021-05-03 14:05:25,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:25,126 INFO L225 Difference]: With dead ends: 5117 [2021-05-03 14:05:25,127 INFO L226 Difference]: Without dead ends: 5117 [2021-05-03 14:05:25,127 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:25,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-05-03 14:05:25,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 4563. [2021-05-03 14:05:25,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4563 states, 4562 states have (on average 2.9723805348531345) internal successors, (13560), 4562 states have internal predecessors, (13560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:25,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 13560 transitions. [2021-05-03 14:05:25,179 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 13560 transitions. Word has length 22 [2021-05-03 14:05:25,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:25,179 INFO L480 AbstractCegarLoop]: Abstraction has 4563 states and 13560 transitions. [2021-05-03 14:05:25,180 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) [2021-05-03 14:05:25,180 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 13560 transitions. [2021-05-03 14:05:25,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:25,183 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:25,183 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:25,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10452 [2021-05-03 14:05:25,384 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:25,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:25,384 INFO L82 PathProgramCache]: Analyzing trace with hash 201932143, now seen corresponding path program 156 times [2021-05-03 14:05:25,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:25,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680973597] [2021-05-03 14:05:25,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:25,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:25,443 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:25,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680973597] [2021-05-03 14:05:25,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985103829] [2021-05-03 14:05:25,443 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 [2021-05-03 14:05:25,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:05:25,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:25,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:25,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:25,517 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:25,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:25,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:25,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351734726] [2021-05-03 14:05:25,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:25,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:25,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:25,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:25,518 INFO L87 Difference]: Start difference. First operand 4563 states and 13560 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) [2021-05-03 14:05:25,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:25,606 INFO L93 Difference]: Finished difference Result 5624 states and 16198 transitions. [2021-05-03 14:05:25,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:05:25,606 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 [2021-05-03 14:05:25,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:25,611 INFO L225 Difference]: With dead ends: 5624 [2021-05-03 14:05:25,611 INFO L226 Difference]: Without dead ends: 5624 [2021-05-03 14:05:25,611 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:25,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5624 states. [2021-05-03 14:05:25,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5624 to 4520. [2021-05-03 14:05:25,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4520 states, 4519 states have (on average 2.969240982518256) internal successors, (13418), 4519 states have internal predecessors, (13418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:25,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4520 states to 4520 states and 13418 transitions. [2021-05-03 14:05:25,665 INFO L78 Accepts]: Start accepts. Automaton has 4520 states and 13418 transitions. Word has length 22 [2021-05-03 14:05:25,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:25,665 INFO L480 AbstractCegarLoop]: Abstraction has 4520 states and 13418 transitions. [2021-05-03 14:05:25,665 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) [2021-05-03 14:05:25,665 INFO L276 IsEmpty]: Start isEmpty. Operand 4520 states and 13418 transitions. [2021-05-03 14:05:25,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:25,668 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:25,668 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:25,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10453 [2021-05-03 14:05:25,869 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:25,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:25,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1858927659, now seen corresponding path program 157 times [2021-05-03 14:05:25,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:25,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994003763] [2021-05-03 14:05:25,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:25,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:25,938 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:25,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994003763] [2021-05-03 14:05:25,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911505176] [2021-05-03 14:05:25,938 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 [2021-05-03 14:05:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:25,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:25,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:26,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:26,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:26,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27446508] [2021-05-03 14:05:26,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:26,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:26,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:26,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:26,003 INFO L87 Difference]: Start difference. First operand 4520 states and 13418 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) [2021-05-03 14:05:26,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:26,119 INFO L93 Difference]: Finished difference Result 7402 states and 21575 transitions. [2021-05-03 14:05:26,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:05:26,119 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 [2021-05-03 14:05:26,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:26,126 INFO L225 Difference]: With dead ends: 7402 [2021-05-03 14:05:26,126 INFO L226 Difference]: Without dead ends: 7402 [2021-05-03 14:05:26,126 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:05:26,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7402 states. [2021-05-03 14:05:26,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7402 to 6132. [2021-05-03 14:05:26,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6132 states, 6131 states have (on average 2.9955961507095092) internal successors, (18366), 6131 states have internal predecessors, (18366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:26,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6132 states to 6132 states and 18366 transitions. [2021-05-03 14:05:26,201 INFO L78 Accepts]: Start accepts. Automaton has 6132 states and 18366 transitions. Word has length 22 [2021-05-03 14:05:26,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:26,201 INFO L480 AbstractCegarLoop]: Abstraction has 6132 states and 18366 transitions. [2021-05-03 14:05:26,201 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) [2021-05-03 14:05:26,202 INFO L276 IsEmpty]: Start isEmpty. Operand 6132 states and 18366 transitions. [2021-05-03 14:05:26,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:26,206 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:26,206 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:26,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10454 [2021-05-03 14:05:26,407 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:26,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:26,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1562527415, now seen corresponding path program 158 times [2021-05-03 14:05:26,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:26,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986388088] [2021-05-03 14:05:26,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:26,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:26,463 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:26,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986388088] [2021-05-03 14:05:26,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169941165] [2021-05-03 14:05:26,464 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 [2021-05-03 14:05:26,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:26,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:26,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:26,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:26,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:26,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:05:26,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135825749] [2021-05-03 14:05:26,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:26,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:26,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:26,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:26,527 INFO L87 Difference]: Start difference. First operand 6132 states and 18366 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) [2021-05-03 14:05:26,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:26,671 INFO L93 Difference]: Finished difference Result 6467 states and 18987 transitions. [2021-05-03 14:05:26,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:05:26,672 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 [2021-05-03 14:05:26,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:26,677 INFO L225 Difference]: With dead ends: 6467 [2021-05-03 14:05:26,678 INFO L226 Difference]: Without dead ends: 6465 [2021-05-03 14:05:26,678 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=207, Invalid=345, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:05:26,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6465 states. [2021-05-03 14:05:26,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6465 to 6222. [2021-05-03 14:05:26,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6222 states, 6221 states have (on average 2.9975888120880887) internal successors, (18648), 6221 states have internal predecessors, (18648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:26,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6222 states to 6222 states and 18648 transitions. [2021-05-03 14:05:26,751 INFO L78 Accepts]: Start accepts. Automaton has 6222 states and 18648 transitions. Word has length 22 [2021-05-03 14:05:26,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:26,751 INFO L480 AbstractCegarLoop]: Abstraction has 6222 states and 18648 transitions. [2021-05-03 14:05:26,751 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) [2021-05-03 14:05:26,751 INFO L276 IsEmpty]: Start isEmpty. Operand 6222 states and 18648 transitions. [2021-05-03 14:05:26,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:26,755 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:26,755 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:26,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10455,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:26,955 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:26,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:26,956 INFO L82 PathProgramCache]: Analyzing trace with hash 155221645, now seen corresponding path program 159 times [2021-05-03 14:05:26,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:26,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894605000] [2021-05-03 14:05:26,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:26,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:27,020 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:27,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894605000] [2021-05-03 14:05:27,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900755045] [2021-05-03 14:05:27,021 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 [2021-05-03 14:05:27,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:05:27,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:27,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:27,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:27,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:27,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:05:27,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523817453] [2021-05-03 14:05:27,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:27,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:27,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:27,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:27,093 INFO L87 Difference]: Start difference. First operand 6222 states and 18648 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) [2021-05-03 14:05:27,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:27,164 INFO L93 Difference]: Finished difference Result 6454 states and 18938 transitions. [2021-05-03 14:05:27,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:05:27,165 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 [2021-05-03 14:05:27,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:27,170 INFO L225 Difference]: With dead ends: 6454 [2021-05-03 14:05:27,170 INFO L226 Difference]: Without dead ends: 6454 [2021-05-03 14:05:27,170 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:27,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6454 states. [2021-05-03 14:05:27,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6454 to 6210. [2021-05-03 14:05:27,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6210 states, 6209 states have (on average 2.995490417136415) internal successors, (18599), 6209 states have internal predecessors, (18599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:27,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6210 states to 6210 states and 18599 transitions. [2021-05-03 14:05:27,244 INFO L78 Accepts]: Start accepts. Automaton has 6210 states and 18599 transitions. Word has length 22 [2021-05-03 14:05:27,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:27,245 INFO L480 AbstractCegarLoop]: Abstraction has 6210 states and 18599 transitions. [2021-05-03 14:05:27,245 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) [2021-05-03 14:05:27,245 INFO L276 IsEmpty]: Start isEmpty. Operand 6210 states and 18599 transitions. [2021-05-03 14:05:27,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:27,249 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:27,249 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:27,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10456 [2021-05-03 14:05:27,450 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:27,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:27,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1573825689, now seen corresponding path program 160 times [2021-05-03 14:05:27,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:27,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4573967] [2021-05-03 14:05:27,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:27,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:27,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4573967] [2021-05-03 14:05:27,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015505343] [2021-05-03 14:05:27,520 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 [2021-05-03 14:05:27,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:27,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:27,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:27,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:27,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:27,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:05:27,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621731610] [2021-05-03 14:05:27,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:27,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:27,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:27,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:27,581 INFO L87 Difference]: Start difference. First operand 6210 states and 18599 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) [2021-05-03 14:05:27,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:27,666 INFO L93 Difference]: Finished difference Result 7159 states and 20967 transitions. [2021-05-03 14:05:27,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:05:27,667 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 [2021-05-03 14:05:27,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:27,673 INFO L225 Difference]: With dead ends: 7159 [2021-05-03 14:05:27,673 INFO L226 Difference]: Without dead ends: 7159 [2021-05-03 14:05:27,673 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:27,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7159 states. [2021-05-03 14:05:27,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7159 to 6221. [2021-05-03 14:05:27,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6221 states, 6220 states have (on average 2.995498392282958) internal successors, (18632), 6220 states have internal predecessors, (18632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:27,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6221 states to 6221 states and 18632 transitions. [2021-05-03 14:05:27,759 INFO L78 Accepts]: Start accepts. Automaton has 6221 states and 18632 transitions. Word has length 22 [2021-05-03 14:05:27,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:27,759 INFO L480 AbstractCegarLoop]: Abstraction has 6221 states and 18632 transitions. [2021-05-03 14:05:27,759 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) [2021-05-03 14:05:27,759 INFO L276 IsEmpty]: Start isEmpty. Operand 6221 states and 18632 transitions. [2021-05-03 14:05:27,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:27,763 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:27,763 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:27,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10457,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:27,964 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:27,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:27,964 INFO L82 PathProgramCache]: Analyzing trace with hash 660281805, now seen corresponding path program 161 times [2021-05-03 14:05:27,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:27,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626237586] [2021-05-03 14:05:27,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:27,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:28,022 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:28,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626237586] [2021-05-03 14:05:28,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89514517] [2021-05-03 14:05:28,023 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 [2021-05-03 14:05:28,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:05:28,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:28,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:28,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:28,083 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:28,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:28,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:05:28,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700521075] [2021-05-03 14:05:28,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:28,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:28,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:28,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:28,084 INFO L87 Difference]: Start difference. First operand 6221 states and 18632 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) [2021-05-03 14:05:28,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:28,180 INFO L93 Difference]: Finished difference Result 10072 states and 29921 transitions. [2021-05-03 14:05:28,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:05:28,181 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 [2021-05-03 14:05:28,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:28,190 INFO L225 Difference]: With dead ends: 10072 [2021-05-03 14:05:28,190 INFO L226 Difference]: Without dead ends: 10072 [2021-05-03 14:05:28,191 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:05:28,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10072 states. [2021-05-03 14:05:28,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10072 to 9194. [2021-05-03 14:05:28,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9194 states, 9193 states have (on average 3.024583922549766) internal successors, (27805), 9193 states have internal predecessors, (27805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:28,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9194 states to 9194 states and 27805 transitions. [2021-05-03 14:05:28,303 INFO L78 Accepts]: Start accepts. Automaton has 9194 states and 27805 transitions. Word has length 22 [2021-05-03 14:05:28,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:28,303 INFO L480 AbstractCegarLoop]: Abstraction has 9194 states and 27805 transitions. [2021-05-03 14:05:28,303 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) [2021-05-03 14:05:28,303 INFO L276 IsEmpty]: Start isEmpty. Operand 9194 states and 27805 transitions. [2021-05-03 14:05:28,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:28,310 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:28,310 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:28,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10458 [2021-05-03 14:05:28,510 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:28,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:28,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1198137383, now seen corresponding path program 162 times [2021-05-03 14:05:28,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:28,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616396064] [2021-05-03 14:05:28,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:28,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:28,575 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:28,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616396064] [2021-05-03 14:05:28,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601995104] [2021-05-03 14:05:28,575 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 [2021-05-03 14:05:28,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:05:28,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:28,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:28,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:28,638 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:28,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:28,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:05:28,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245592638] [2021-05-03 14:05:28,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:28,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:28,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:28,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:28,639 INFO L87 Difference]: Start difference. First operand 9194 states and 27805 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) [2021-05-03 14:05:28,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:28,795 INFO L93 Difference]: Finished difference Result 13143 states and 39385 transitions. [2021-05-03 14:05:28,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:05:28,796 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 [2021-05-03 14:05:28,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:28,812 INFO L225 Difference]: With dead ends: 13143 [2021-05-03 14:05:28,812 INFO L226 Difference]: Without dead ends: 13143 [2021-05-03 14:05:28,812 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:05:28,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13143 states. [2021-05-03 14:05:28,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13143 to 11491. [2021-05-03 14:05:28,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11491 states, 11490 states have (on average 3.0464751958224543) internal successors, (35004), 11490 states have internal predecessors, (35004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:28,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11491 states to 11491 states and 35004 transitions. [2021-05-03 14:05:28,969 INFO L78 Accepts]: Start accepts. Automaton has 11491 states and 35004 transitions. Word has length 22 [2021-05-03 14:05:28,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:28,969 INFO L480 AbstractCegarLoop]: Abstraction has 11491 states and 35004 transitions. [2021-05-03 14:05:28,969 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) [2021-05-03 14:05:28,969 INFO L276 IsEmpty]: Start isEmpty. Operand 11491 states and 35004 transitions. [2021-05-03 14:05:28,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:28,977 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:28,977 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:29,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10459 [2021-05-03 14:05:29,178 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:29,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:29,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1940843115, now seen corresponding path program 163 times [2021-05-03 14:05:29,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:29,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809252724] [2021-05-03 14:05:29,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:29,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:05:29,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809252724] [2021-05-03 14:05:29,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917180785] [2021-05-03 14:05:29,272 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 [2021-05-03 14:05:29,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:29,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:29,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:29,326 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:05:29,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:29,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:05:29,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752345660] [2021-05-03 14:05:29,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:05:29,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:29,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:05:29,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:05:29,326 INFO L87 Difference]: Start difference. First operand 11491 states and 35004 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) [2021-05-03 14:05:29,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:29,481 INFO L93 Difference]: Finished difference Result 12000 states and 36264 transitions. [2021-05-03 14:05:29,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:05:29,482 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 22 [2021-05-03 14:05:29,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:29,498 INFO L225 Difference]: With dead ends: 12000 [2021-05-03 14:05:29,498 INFO L226 Difference]: Without dead ends: 11996 [2021-05-03 14:05:29,498 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 110.5ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:05:29,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11996 states. [2021-05-03 14:05:29,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11996 to 11808. [2021-05-03 14:05:29,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11808 states, 11807 states have (on average 3.0505632252053867) internal successors, (36018), 11807 states have internal predecessors, (36018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:29,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11808 states to 11808 states and 36018 transitions. [2021-05-03 14:05:29,668 INFO L78 Accepts]: Start accepts. Automaton has 11808 states and 36018 transitions. Word has length 22 [2021-05-03 14:05:29,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:29,668 INFO L480 AbstractCegarLoop]: Abstraction has 11808 states and 36018 transitions. [2021-05-03 14:05:29,668 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) [2021-05-03 14:05:29,668 INFO L276 IsEmpty]: Start isEmpty. Operand 11808 states and 36018 transitions. [2021-05-03 14:05:29,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:29,676 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:29,677 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:29,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10460,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:29,891 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:29,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:29,891 INFO L82 PathProgramCache]: Analyzing trace with hash 469575189, now seen corresponding path program 164 times [2021-05-03 14:05:29,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:29,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354504707] [2021-05-03 14:05:29,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:29,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:29,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354504707] [2021-05-03 14:05:29,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373906804] [2021-05-03 14:05:29,946 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 [2021-05-03 14:05:29,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:29,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:29,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:29,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:30,005 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:30,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:30,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:05:30,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284295642] [2021-05-03 14:05:30,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:30,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:30,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:30,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:30,006 INFO L87 Difference]: Start difference. First operand 11808 states and 36018 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) [2021-05-03 14:05:30,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:30,133 INFO L93 Difference]: Finished difference Result 14397 states and 43404 transitions. [2021-05-03 14:05:30,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:05:30,134 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 [2021-05-03 14:05:30,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:30,151 INFO L225 Difference]: With dead ends: 14397 [2021-05-03 14:05:30,151 INFO L226 Difference]: Without dead ends: 14397 [2021-05-03 14:05:30,151 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:05:30,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14397 states. [2021-05-03 14:05:30,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14397 to 12614. [2021-05-03 14:05:30,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12614 states, 12613 states have (on average 3.0629509236502024) internal successors, (38633), 12613 states have internal predecessors, (38633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:30,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12614 states to 12614 states and 38633 transitions. [2021-05-03 14:05:30,350 INFO L78 Accepts]: Start accepts. Automaton has 12614 states and 38633 transitions. Word has length 22 [2021-05-03 14:05:30,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:30,350 INFO L480 AbstractCegarLoop]: Abstraction has 12614 states and 38633 transitions. [2021-05-03 14:05:30,350 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) [2021-05-03 14:05:30,350 INFO L276 IsEmpty]: Start isEmpty. Operand 12614 states and 38633 transitions. [2021-05-03 14:05:30,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:30,358 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:30,358 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:30,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10461,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:30,573 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:30,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:30,573 INFO L82 PathProgramCache]: Analyzing trace with hash -36771077, now seen corresponding path program 165 times [2021-05-03 14:05:30,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:30,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113430789] [2021-05-03 14:05:30,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:30,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:30,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113430789] [2021-05-03 14:05:30,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127923603] [2021-05-03 14:05:30,634 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 [2021-05-03 14:05:30,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:05:30,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:30,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:30,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:30,706 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:30,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:30,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:05:30,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744098647] [2021-05-03 14:05:30,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:30,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:30,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:30,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:30,707 INFO L87 Difference]: Start difference. First operand 12614 states and 38633 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) [2021-05-03 14:05:30,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:30,849 INFO L93 Difference]: Finished difference Result 15242 states and 46024 transitions. [2021-05-03 14:05:30,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:05:30,849 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 [2021-05-03 14:05:30,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:30,870 INFO L225 Difference]: With dead ends: 15242 [2021-05-03 14:05:30,870 INFO L226 Difference]: Without dead ends: 15242 [2021-05-03 14:05:30,870 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:05:30,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15242 states. [2021-05-03 14:05:30,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15242 to 6456. [2021-05-03 14:05:30,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6456 states, 6455 states have (on average 3.013787761425252) internal successors, (19454), 6455 states have internal predecessors, (19454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:31,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6456 states to 6456 states and 19454 transitions. [2021-05-03 14:05:31,005 INFO L78 Accepts]: Start accepts. Automaton has 6456 states and 19454 transitions. Word has length 22 [2021-05-03 14:05:31,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:31,005 INFO L480 AbstractCegarLoop]: Abstraction has 6456 states and 19454 transitions. [2021-05-03 14:05:31,005 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) [2021-05-03 14:05:31,005 INFO L276 IsEmpty]: Start isEmpty. Operand 6456 states and 19454 transitions. [2021-05-03 14:05:31,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:31,010 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:31,010 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:31,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10462 [2021-05-03 14:05:31,224 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:31,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:31,224 INFO L82 PathProgramCache]: Analyzing trace with hash 501084501, now seen corresponding path program 166 times [2021-05-03 14:05:31,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:31,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283801599] [2021-05-03 14:05:31,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:31,333 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:31,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283801599] [2021-05-03 14:05:31,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331649141] [2021-05-03 14:05:31,333 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 [2021-05-03 14:05:31,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:31,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:31,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:31,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:31,392 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:31,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:31,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:05:31,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481620296] [2021-05-03 14:05:31,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:31,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:31,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:31,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:31,393 INFO L87 Difference]: Start difference. First operand 6456 states and 19454 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) [2021-05-03 14:05:31,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:31,561 INFO L93 Difference]: Finished difference Result 9785 states and 29004 transitions. [2021-05-03 14:05:31,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:05:31,561 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 [2021-05-03 14:05:31,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:31,573 INFO L225 Difference]: With dead ends: 9785 [2021-05-03 14:05:31,573 INFO L226 Difference]: Without dead ends: 9785 [2021-05-03 14:05:31,574 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=217, Invalid=383, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:05:31,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9785 states. [2021-05-03 14:05:31,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9785 to 6500. [2021-05-03 14:05:31,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6500 states, 6499 states have (on average 3.014002154177566) internal successors, (19588), 6499 states have internal predecessors, (19588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:31,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6500 states to 6500 states and 19588 transitions. [2021-05-03 14:05:31,683 INFO L78 Accepts]: Start accepts. Automaton has 6500 states and 19588 transitions. Word has length 22 [2021-05-03 14:05:31,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:31,683 INFO L480 AbstractCegarLoop]: Abstraction has 6500 states and 19588 transitions. [2021-05-03 14:05:31,683 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) [2021-05-03 14:05:31,683 INFO L276 IsEmpty]: Start isEmpty. Operand 6500 states and 19588 transitions. [2021-05-03 14:05:31,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:31,688 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:31,688 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:31,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10463,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:31,902 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:31,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:31,903 INFO L82 PathProgramCache]: Analyzing trace with hash -776445359, now seen corresponding path program 167 times [2021-05-03 14:05:31,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:31,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430142566] [2021-05-03 14:05:31,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:31,953 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:31,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430142566] [2021-05-03 14:05:31,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288852277] [2021-05-03 14:05:31,953 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 [2021-05-03 14:05:32,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:05:32,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:32,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:32,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:32,034 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:32,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:32,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:05:32,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932096884] [2021-05-03 14:05:32,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:32,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:32,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:32,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:32,035 INFO L87 Difference]: Start difference. First operand 6500 states and 19588 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) [2021-05-03 14:05:32,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:32,201 INFO L93 Difference]: Finished difference Result 6765 states and 19991 transitions. [2021-05-03 14:05:32,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:05:32,202 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 [2021-05-03 14:05:32,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:32,210 INFO L225 Difference]: With dead ends: 6765 [2021-05-03 14:05:32,210 INFO L226 Difference]: Without dead ends: 6761 [2021-05-03 14:05:32,210 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=206, Invalid=346, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:05:32,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6761 states. [2021-05-03 14:05:32,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6761 to 6403. [2021-05-03 14:05:32,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6403 states, 6402 states have (on average 3.009215870040612) internal successors, (19265), 6402 states have internal predecessors, (19265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:32,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6403 states to 6403 states and 19265 transitions. [2021-05-03 14:05:32,294 INFO L78 Accepts]: Start accepts. Automaton has 6403 states and 19265 transitions. Word has length 22 [2021-05-03 14:05:32,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:32,294 INFO L480 AbstractCegarLoop]: Abstraction has 6403 states and 19265 transitions. [2021-05-03 14:05:32,294 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) [2021-05-03 14:05:32,295 INFO L276 IsEmpty]: Start isEmpty. Operand 6403 states and 19265 transitions. [2021-05-03 14:05:32,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:32,300 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:32,300 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:32,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10464 [2021-05-03 14:05:32,513 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:32,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:32,513 INFO L82 PathProgramCache]: Analyzing trace with hash 941303701, now seen corresponding path program 168 times [2021-05-03 14:05:32,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:32,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146480619] [2021-05-03 14:05:32,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:32,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:32,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146480619] [2021-05-03 14:05:32,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34792230] [2021-05-03 14:05:32,565 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) [2021-05-03 14:05:32,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:05:32,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:32,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:32,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:32,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:32,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:05:32,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092781532] [2021-05-03 14:05:32,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:32,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:32,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:32,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:32,632 INFO L87 Difference]: Start difference. First operand 6403 states and 19265 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) [2021-05-03 14:05:32,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:32,746 INFO L93 Difference]: Finished difference Result 6899 states and 20313 transitions. [2021-05-03 14:05:32,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:05:32,747 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 [2021-05-03 14:05:32,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:32,755 INFO L225 Difference]: With dead ends: 6899 [2021-05-03 14:05:32,755 INFO L226 Difference]: Without dead ends: 6899 [2021-05-03 14:05:32,755 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:05:32,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6899 states. [2021-05-03 14:05:32,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6899 to 6402. [2021-05-03 14:05:32,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6402 states, 6401 states have (on average 3.0073426027183254) internal successors, (19250), 6401 states have internal predecessors, (19250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:32,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6402 states to 6402 states and 19250 transitions. [2021-05-03 14:05:32,842 INFO L78 Accepts]: Start accepts. Automaton has 6402 states and 19250 transitions. Word has length 22 [2021-05-03 14:05:32,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:32,842 INFO L480 AbstractCegarLoop]: Abstraction has 6402 states and 19250 transitions. [2021-05-03 14:05:32,842 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) [2021-05-03 14:05:32,842 INFO L276 IsEmpty]: Start isEmpty. Operand 6402 states and 19250 transitions. [2021-05-03 14:05:32,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:32,847 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:32,847 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:33,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10465 [2021-05-03 14:05:33,068 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:33,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:33,068 INFO L82 PathProgramCache]: Analyzing trace with hash -787743633, now seen corresponding path program 169 times [2021-05-03 14:05:33,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:33,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535285231] [2021-05-03 14:05:33,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:33,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:33,153 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:33,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535285231] [2021-05-03 14:05:33,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492445064] [2021-05-03 14:05:33,153 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) [2021-05-03 14:05:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:33,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:33,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:33,236 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:33,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:33,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:33,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495016034] [2021-05-03 14:05:33,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:33,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:33,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:33,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:33,237 INFO L87 Difference]: Start difference. First operand 6402 states and 19250 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) [2021-05-03 14:05:33,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:33,319 INFO L93 Difference]: Finished difference Result 6620 states and 19508 transitions. [2021-05-03 14:05:33,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:05:33,320 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 [2021-05-03 14:05:33,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:33,327 INFO L225 Difference]: With dead ends: 6620 [2021-05-03 14:05:33,327 INFO L226 Difference]: Without dead ends: 6620 [2021-05-03 14:05:33,328 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:05:33,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6620 states. [2021-05-03 14:05:33,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6620 to 6370. [2021-05-03 14:05:33,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6370 states, 6369 states have (on average 3.004396294551735) internal successors, (19135), 6369 states have internal predecessors, (19135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:33,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6370 states to 6370 states and 19135 transitions. [2021-05-03 14:05:33,414 INFO L78 Accepts]: Start accepts. Automaton has 6370 states and 19135 transitions. Word has length 22 [2021-05-03 14:05:33,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:33,415 INFO L480 AbstractCegarLoop]: Abstraction has 6370 states and 19135 transitions. [2021-05-03 14:05:33,415 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) [2021-05-03 14:05:33,415 INFO L276 IsEmpty]: Start isEmpty. Operand 6370 states and 19135 transitions. [2021-05-03 14:05:33,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:33,420 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:33,420 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:33,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10466 [2021-05-03 14:05:33,635 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:33,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:33,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1446363861, now seen corresponding path program 170 times [2021-05-03 14:05:33,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:33,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658169470] [2021-05-03 14:05:33,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:33,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:33,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658169470] [2021-05-03 14:05:33,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564750032] [2021-05-03 14:05:33,704 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 [2021-05-03 14:05:33,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:33,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:33,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:33,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:33,769 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:33,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:33,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:05:33,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423807339] [2021-05-03 14:05:33,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:05:33,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:33,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:05:33,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:05:33,793 INFO L87 Difference]: Start difference. First operand 6370 states and 19135 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) [2021-05-03 14:05:33,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:33,910 INFO L93 Difference]: Finished difference Result 7662 states and 22542 transitions. [2021-05-03 14:05:33,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:05:33,910 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 [2021-05-03 14:05:33,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:33,920 INFO L225 Difference]: With dead ends: 7662 [2021-05-03 14:05:33,920 INFO L226 Difference]: Without dead ends: 7662 [2021-05-03 14:05:33,921 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:05:33,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7662 states. [2021-05-03 14:05:34,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7662 to 6264. [2021-05-03 14:05:34,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6264 states, 6263 states have (on average 2.9996806642184257) internal successors, (18787), 6263 states have internal predecessors, (18787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:34,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6264 states to 6264 states and 18787 transitions. [2021-05-03 14:05:34,014 INFO L78 Accepts]: Start accepts. Automaton has 6264 states and 18787 transitions. Word has length 22 [2021-05-03 14:05:34,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:34,015 INFO L480 AbstractCegarLoop]: Abstraction has 6264 states and 18787 transitions. [2021-05-03 14:05:34,015 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) [2021-05-03 14:05:34,015 INFO L276 IsEmpty]: Start isEmpty. Operand 6264 states and 18787 transitions. [2021-05-03 14:05:34,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:34,019 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:34,019 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:34,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10467,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:34,234 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:34,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:34,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1984219439, now seen corresponding path program 171 times [2021-05-03 14:05:34,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:34,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138584850] [2021-05-03 14:05:34,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:34,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:34,300 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:34,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138584850] [2021-05-03 14:05:34,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220385263] [2021-05-03 14:05:34,300 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 [2021-05-03 14:05:34,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:05:34,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:34,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:34,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:34,399 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:34,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:34,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:05:34,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664727702] [2021-05-03 14:05:34,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:05:34,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:34,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:05:34,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:05:34,400 INFO L87 Difference]: Start difference. First operand 6264 states and 18787 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) [2021-05-03 14:05:34,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:34,556 INFO L93 Difference]: Finished difference Result 9995 states and 29712 transitions. [2021-05-03 14:05:34,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:05:34,557 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 [2021-05-03 14:05:34,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:34,568 INFO L225 Difference]: With dead ends: 9995 [2021-05-03 14:05:34,568 INFO L226 Difference]: Without dead ends: 9995 [2021-05-03 14:05:34,569 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 119.8ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:05:34,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9995 states. [2021-05-03 14:05:34,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9995 to 7256. [2021-05-03 14:05:34,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7256 states, 7255 states have (on average 3.0132322536181944) internal successors, (21861), 7255 states have internal predecessors, (21861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:34,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7256 states to 7256 states and 21861 transitions. [2021-05-03 14:05:34,682 INFO L78 Accepts]: Start accepts. Automaton has 7256 states and 21861 transitions. Word has length 22 [2021-05-03 14:05:34,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:34,696 INFO L480 AbstractCegarLoop]: Abstraction has 7256 states and 21861 transitions. [2021-05-03 14:05:34,697 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) [2021-05-03 14:05:34,697 INFO L276 IsEmpty]: Start isEmpty. Operand 7256 states and 21861 transitions. [2021-05-03 14:05:34,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:34,702 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:34,702 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:34,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10468 [2021-05-03 14:05:34,925 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:34,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:34,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1477873173, now seen corresponding path program 172 times [2021-05-03 14:05:34,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:34,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966426847] [2021-05-03 14:05:34,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:34,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:35,001 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:35,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966426847] [2021-05-03 14:05:35,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692166161] [2021-05-03 14:05:35,001 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 [2021-05-03 14:05:35,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:35,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:35,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:35,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:35,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:35,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:05:35,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793686993] [2021-05-03 14:05:35,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:05:35,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:35,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:05:35,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:05:35,085 INFO L87 Difference]: Start difference. First operand 7256 states and 21861 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) [2021-05-03 14:05:35,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:35,323 INFO L93 Difference]: Finished difference Result 11660 states and 34640 transitions. [2021-05-03 14:05:35,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:05:35,323 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 [2021-05-03 14:05:35,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:35,338 INFO L225 Difference]: With dead ends: 11660 [2021-05-03 14:05:35,338 INFO L226 Difference]: Without dead ends: 11660 [2021-05-03 14:05:35,338 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 190.9ms TimeCoverageRelationStatistics Valid=309, Invalid=561, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:05:35,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11660 states. [2021-05-03 14:05:35,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11660 to 9258. [2021-05-03 14:05:35,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9258 states, 9257 states have (on average 3.0371610673004215) internal successors, (28115), 9257 states have internal predecessors, (28115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:35,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9258 states to 9258 states and 28115 transitions. [2021-05-03 14:05:35,481 INFO L78 Accepts]: Start accepts. Automaton has 9258 states and 28115 transitions. Word has length 22 [2021-05-03 14:05:35,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:35,481 INFO L480 AbstractCegarLoop]: Abstraction has 9258 states and 28115 transitions. [2021-05-03 14:05:35,481 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) [2021-05-03 14:05:35,481 INFO L276 IsEmpty]: Start isEmpty. Operand 9258 states and 28115 transitions. [2021-05-03 14:05:35,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:35,489 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:35,489 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:35,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10469,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:35,703 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:35,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:35,703 INFO L82 PathProgramCache]: Analyzing trace with hash -2074645977, now seen corresponding path program 173 times [2021-05-03 14:05:35,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:35,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273731805] [2021-05-03 14:05:35,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:35,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:35,760 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:05:35,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273731805] [2021-05-03 14:05:35,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732057196] [2021-05-03 14:05:35,760 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) [2021-05-03 14:05:35,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:05:35,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:35,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:35,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:35,836 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:05:35,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:35,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:05:35,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115115654] [2021-05-03 14:05:35,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:05:35,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:35,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:05:35,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:05:35,836 INFO L87 Difference]: Start difference. First operand 9258 states and 28115 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) [2021-05-03 14:05:35,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:35,990 INFO L93 Difference]: Finished difference Result 9612 states and 28912 transitions. [2021-05-03 14:05:35,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:05:35,990 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 22 [2021-05-03 14:05:35,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:36,003 INFO L225 Difference]: With dead ends: 9612 [2021-05-03 14:05:36,003 INFO L226 Difference]: Without dead ends: 9608 [2021-05-03 14:05:36,003 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:05:36,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9608 states. [2021-05-03 14:05:36,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9608 to 9445. [2021-05-03 14:05:36,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9445 states, 9444 states have (on average 3.039919525624735) internal successors, (28709), 9444 states have internal predecessors, (28709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:36,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9445 states to 9445 states and 28709 transitions. [2021-05-03 14:05:36,128 INFO L78 Accepts]: Start accepts. Automaton has 9445 states and 28709 transitions. Word has length 22 [2021-05-03 14:05:36,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:36,128 INFO L480 AbstractCegarLoop]: Abstraction has 9445 states and 28709 transitions. [2021-05-03 14:05:36,128 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) [2021-05-03 14:05:36,128 INFO L276 IsEmpty]: Start isEmpty. Operand 9445 states and 28709 transitions. [2021-05-03 14:05:36,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:36,135 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:36,135 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:36,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10470,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:36,349 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:36,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:36,350 INFO L82 PathProgramCache]: Analyzing trace with hash 367281639, now seen corresponding path program 174 times [2021-05-03 14:05:36,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:36,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043277413] [2021-05-03 14:05:36,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:36,409 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:36,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043277413] [2021-05-03 14:05:36,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55667059] [2021-05-03 14:05:36,410 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:05:36,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-03 14:05:36,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:36,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:36,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:36,478 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:36,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:36,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:05:36,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936613240] [2021-05-03 14:05:36,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:36,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:36,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:36,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:36,479 INFO L87 Difference]: Start difference. First operand 9445 states and 28709 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) [2021-05-03 14:05:36,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:36,651 INFO L93 Difference]: Finished difference Result 12460 states and 37247 transitions. [2021-05-03 14:05:36,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:05:36,652 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 [2021-05-03 14:05:36,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:36,669 INFO L225 Difference]: With dead ends: 12460 [2021-05-03 14:05:36,669 INFO L226 Difference]: Without dead ends: 12460 [2021-05-03 14:05:36,669 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 124.1ms TimeCoverageRelationStatistics Valid=216, Invalid=384, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:05:36,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12460 states. [2021-05-03 14:05:36,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12460 to 9999. [2021-05-03 14:05:36,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9999 states, 9998 states have (on average 3.049109821964393) internal successors, (30485), 9998 states have internal predecessors, (30485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:36,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9999 states to 9999 states and 30485 transitions. [2021-05-03 14:05:36,820 INFO L78 Accepts]: Start accepts. Automaton has 9999 states and 30485 transitions. Word has length 22 [2021-05-03 14:05:36,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:36,820 INFO L480 AbstractCegarLoop]: Abstraction has 9999 states and 30485 transitions. [2021-05-03 14:05:36,820 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) [2021-05-03 14:05:36,820 INFO L276 IsEmpty]: Start isEmpty. Operand 9999 states and 30485 transitions. [2021-05-03 14:05:36,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:36,828 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:36,828 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:37,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10471 [2021-05-03 14:05:37,042 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:37,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:37,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1850416577, now seen corresponding path program 175 times [2021-05-03 14:05:37,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:37,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003657831] [2021-05-03 14:05:37,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:37,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:37,147 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:37,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003657831] [2021-05-03 14:05:37,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234659951] [2021-05-03 14:05:37,147 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 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 [2021-05-03 14:05:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:37,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:37,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:37,278 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:37,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:37,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:05:37,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460798657] [2021-05-03 14:05:37,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:05:37,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:37,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:05:37,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:05:37,279 INFO L87 Difference]: Start difference. First operand 9999 states and 30485 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) [2021-05-03 14:05:37,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:37,446 INFO L93 Difference]: Finished difference Result 12909 states and 38690 transitions. [2021-05-03 14:05:37,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:05:37,446 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 [2021-05-03 14:05:37,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:37,464 INFO L225 Difference]: With dead ends: 12909 [2021-05-03 14:05:37,464 INFO L226 Difference]: Without dead ends: 12909 [2021-05-03 14:05:37,464 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 137.2ms TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:05:37,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12909 states. [2021-05-03 14:05:37,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12909 to 6060. [2021-05-03 14:05:37,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6060 states, 6059 states have (on average 3.0120481927710845) internal successors, (18250), 6059 states have internal predecessors, (18250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:37,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6060 states to 6060 states and 18250 transitions. [2021-05-03 14:05:37,584 INFO L78 Accepts]: Start accepts. Automaton has 6060 states and 18250 transitions. Word has length 22 [2021-05-03 14:05:37,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:37,584 INFO L480 AbstractCegarLoop]: Abstraction has 6060 states and 18250 transitions. [2021-05-03 14:05:37,584 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) [2021-05-03 14:05:37,585 INFO L276 IsEmpty]: Start isEmpty. Operand 6060 states and 18250 transitions. [2021-05-03 14:05:37,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:37,589 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:37,589 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:37,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10472,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:37,804 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:37,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:37,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1344070311, now seen corresponding path program 176 times [2021-05-03 14:05:37,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:37,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626670107] [2021-05-03 14:05:37,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:37,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:37,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626670107] [2021-05-03 14:05:37,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343315829] [2021-05-03 14:05:37,867 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 [2021-05-03 14:05:37,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:37,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:37,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:37,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:37,933 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:37,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:37,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:05:37,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973985352] [2021-05-03 14:05:37,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:05:37,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:37,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:05:37,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:05:37,934 INFO L87 Difference]: Start difference. First operand 6060 states and 18250 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) [2021-05-03 14:05:38,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:38,148 INFO L93 Difference]: Finished difference Result 9798 states and 28894 transitions. [2021-05-03 14:05:38,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:05:38,149 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 [2021-05-03 14:05:38,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:38,160 INFO L225 Difference]: With dead ends: 9798 [2021-05-03 14:05:38,160 INFO L226 Difference]: Without dead ends: 9798 [2021-05-03 14:05:38,160 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 171.5ms TimeCoverageRelationStatistics Valid=308, Invalid=562, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:05:38,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9798 states. [2021-05-03 14:05:38,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9798 to 5868. [2021-05-03 14:05:38,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5868 states, 5867 states have (on average 3.0093744673598093) internal successors, (17656), 5867 states have internal predecessors, (17656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:38,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5868 states to 5868 states and 17656 transitions. [2021-05-03 14:05:38,288 INFO L78 Accepts]: Start accepts. Automaton has 5868 states and 17656 transitions. Word has length 22 [2021-05-03 14:05:38,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:38,288 INFO L480 AbstractCegarLoop]: Abstraction has 5868 states and 17656 transitions. [2021-05-03 14:05:38,288 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) [2021-05-03 14:05:38,288 INFO L276 IsEmpty]: Start isEmpty. Operand 5868 states and 17656 transitions. [2021-05-03 14:05:38,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:38,293 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:38,293 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:38,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10473 [2021-05-03 14:05:38,507 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:38,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:38,508 INFO L82 PathProgramCache]: Analyzing trace with hash 2117261897, now seen corresponding path program 177 times [2021-05-03 14:05:38,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:38,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552979326] [2021-05-03 14:05:38,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:38,557 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:38,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552979326] [2021-05-03 14:05:38,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337284000] [2021-05-03 14:05:38,557 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 [2021-05-03 14:05:38,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:05:38,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:38,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:38,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:38,615 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:38,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:38,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:05:38,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587772763] [2021-05-03 14:05:38,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:38,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:38,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:38,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:38,616 INFO L87 Difference]: Start difference. First operand 5868 states and 17656 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) [2021-05-03 14:05:38,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:38,777 INFO L93 Difference]: Finished difference Result 6116 states and 18033 transitions. [2021-05-03 14:05:38,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:05:38,777 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 [2021-05-03 14:05:38,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:38,784 INFO L225 Difference]: With dead ends: 6116 [2021-05-03 14:05:38,784 INFO L226 Difference]: Without dead ends: 6112 [2021-05-03 14:05:38,784 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 111.4ms TimeCoverageRelationStatistics Valid=205, Invalid=347, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:05:38,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6112 states. [2021-05-03 14:05:38,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6112 to 5813. [2021-05-03 14:05:38,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5813 states, 5812 states have (on average 3.0051617343427393) internal successors, (17466), 5812 states have internal predecessors, (17466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:38,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5813 states to 5813 states and 17466 transitions. [2021-05-03 14:05:38,853 INFO L78 Accepts]: Start accepts. Automaton has 5813 states and 17466 transitions. Word has length 22 [2021-05-03 14:05:38,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:38,853 INFO L480 AbstractCegarLoop]: Abstraction has 5813 states and 17466 transitions. [2021-05-03 14:05:38,853 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) [2021-05-03 14:05:38,853 INFO L276 IsEmpty]: Start isEmpty. Operand 5813 states and 17466 transitions. [2021-05-03 14:05:38,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:38,858 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:38,858 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:39,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10474 [2021-05-03 14:05:39,073 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:39,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:39,074 INFO L82 PathProgramCache]: Analyzing trace with hash -459956339, now seen corresponding path program 178 times [2021-05-03 14:05:39,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:39,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669696375] [2021-05-03 14:05:39,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:39,124 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:39,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669696375] [2021-05-03 14:05:39,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387263633] [2021-05-03 14:05:39,124 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 [2021-05-03 14:05:39,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:39,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:39,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:39,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:39,203 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:39,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:39,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:05:39,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362417145] [2021-05-03 14:05:39,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:39,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:39,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:39,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:39,205 INFO L87 Difference]: Start difference. First operand 5813 states and 17466 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) [2021-05-03 14:05:39,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:39,291 INFO L93 Difference]: Finished difference Result 6374 states and 18724 transitions. [2021-05-03 14:05:39,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:05:39,291 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 [2021-05-03 14:05:39,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:39,298 INFO L225 Difference]: With dead ends: 6374 [2021-05-03 14:05:39,298 INFO L226 Difference]: Without dead ends: 6374 [2021-05-03 14:05:39,299 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=114, Invalid=158, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:05:39,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6374 states. [2021-05-03 14:05:39,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6374 to 5821. [2021-05-03 14:05:39,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5821 states, 5820 states have (on average 3.004982817869416) internal successors, (17489), 5820 states have internal predecessors, (17489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:39,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 17489 transitions. [2021-05-03 14:05:39,374 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 17489 transitions. Word has length 22 [2021-05-03 14:05:39,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:39,374 INFO L480 AbstractCegarLoop]: Abstraction has 5821 states and 17489 transitions. [2021-05-03 14:05:39,374 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) [2021-05-03 14:05:39,374 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 17489 transitions. [2021-05-03 14:05:39,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:39,378 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:39,378 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:39,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10475 [2021-05-03 14:05:39,593 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:39,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:39,593 INFO L82 PathProgramCache]: Analyzing trace with hash 2105963623, now seen corresponding path program 179 times [2021-05-03 14:05:39,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:39,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730785829] [2021-05-03 14:05:39,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:39,653 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:39,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730785829] [2021-05-03 14:05:39,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425035324] [2021-05-03 14:05:39,653 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 [2021-05-03 14:05:39,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:05:39,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:39,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:39,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:39,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:39,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:39,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834459992] [2021-05-03 14:05:39,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:39,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:39,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:39,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:39,740 INFO L87 Difference]: Start difference. First operand 5821 states and 17489 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) [2021-05-03 14:05:39,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:39,838 INFO L93 Difference]: Finished difference Result 6454 states and 18955 transitions. [2021-05-03 14:05:39,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:05:39,838 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 [2021-05-03 14:05:39,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:39,845 INFO L225 Difference]: With dead ends: 6454 [2021-05-03 14:05:39,845 INFO L226 Difference]: Without dead ends: 6454 [2021-05-03 14:05:39,845 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:05:39,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6454 states. [2021-05-03 14:05:39,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6454 to 5751. [2021-05-03 14:05:39,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5751 states, 5750 states have (on average 3.001391304347826) internal successors, (17258), 5750 states have internal predecessors, (17258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:39,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5751 states to 5751 states and 17258 transitions. [2021-05-03 14:05:39,913 INFO L78 Accepts]: Start accepts. Automaton has 5751 states and 17258 transitions. Word has length 22 [2021-05-03 14:05:39,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:39,914 INFO L480 AbstractCegarLoop]: Abstraction has 5751 states and 17258 transitions. [2021-05-03 14:05:39,914 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) [2021-05-03 14:05:39,914 INFO L276 IsEmpty]: Start isEmpty. Operand 5751 states and 17258 transitions. [2021-05-03 14:05:39,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:39,917 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:39,917 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:40,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10476 [2021-05-03 14:05:40,136 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:40,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:40,137 INFO L82 PathProgramCache]: Analyzing trace with hash 45103821, now seen corresponding path program 180 times [2021-05-03 14:05:40,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:40,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800166767] [2021-05-03 14:05:40,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:40,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:40,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800166767] [2021-05-03 14:05:40,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451107716] [2021-05-03 14:05:40,191 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 [2021-05-03 14:05:40,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:05:40,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:40,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:40,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:40,279 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:40,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:40,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:40,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513802133] [2021-05-03 14:05:40,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:40,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:40,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:40,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:40,279 INFO L87 Difference]: Start difference. First operand 5751 states and 17258 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) [2021-05-03 14:05:40,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:40,377 INFO L93 Difference]: Finished difference Result 9965 states and 29813 transitions. [2021-05-03 14:05:40,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:05:40,377 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 [2021-05-03 14:05:40,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:40,390 INFO L225 Difference]: With dead ends: 9965 [2021-05-03 14:05:40,390 INFO L226 Difference]: Without dead ends: 9965 [2021-05-03 14:05:40,391 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:40,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9965 states. [2021-05-03 14:05:40,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9965 to 9679. [2021-05-03 14:05:40,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9679 states, 9678 states have (on average 3.0377144038024384) internal successors, (29399), 9678 states have internal predecessors, (29399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:40,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9679 states to 9679 states and 29399 transitions. [2021-05-03 14:05:40,521 INFO L78 Accepts]: Start accepts. Automaton has 9679 states and 29399 transitions. Word has length 22 [2021-05-03 14:05:40,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:40,521 INFO L480 AbstractCegarLoop]: Abstraction has 9679 states and 29399 transitions. [2021-05-03 14:05:40,521 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) [2021-05-03 14:05:40,521 INFO L276 IsEmpty]: Start isEmpty. Operand 9679 states and 29399 transitions. [2021-05-03 14:05:40,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:40,527 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:40,527 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:40,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10477,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:40,741 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:40,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:40,742 INFO L82 PathProgramCache]: Analyzing trace with hash 582959399, now seen corresponding path program 181 times [2021-05-03 14:05:40,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:40,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543584144] [2021-05-03 14:05:40,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:40,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:40,836 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:40,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543584144] [2021-05-03 14:05:40,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624658060] [2021-05-03 14:05:40,836 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 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 [2021-05-03 14:05:40,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:40,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:40,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:40,921 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:40,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:40,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:05:40,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673393858] [2021-05-03 14:05:40,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:05:40,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:40,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:05:40,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:05:40,921 INFO L87 Difference]: Start difference. First operand 9679 states and 29399 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) [2021-05-03 14:05:41,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:41,059 INFO L93 Difference]: Finished difference Result 10632 states and 31706 transitions. [2021-05-03 14:05:41,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:05:41,060 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 [2021-05-03 14:05:41,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:41,072 INFO L225 Difference]: With dead ends: 10632 [2021-05-03 14:05:41,072 INFO L226 Difference]: Without dead ends: 10632 [2021-05-03 14:05:41,072 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:05:41,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2021-05-03 14:05:41,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 8622. [2021-05-03 14:05:41,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8622 states, 8621 states have (on average 3.030506901751537) internal successors, (26126), 8621 states have internal predecessors, (26126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:41,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8622 states to 8622 states and 26126 transitions. [2021-05-03 14:05:41,196 INFO L78 Accepts]: Start accepts. Automaton has 8622 states and 26126 transitions. Word has length 22 [2021-05-03 14:05:41,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:41,196 INFO L480 AbstractCegarLoop]: Abstraction has 8622 states and 26126 transitions. [2021-05-03 14:05:41,196 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) [2021-05-03 14:05:41,196 INFO L276 IsEmpty]: Start isEmpty. Operand 8622 states and 26126 transitions. [2021-05-03 14:05:41,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:41,201 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:41,201 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:41,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10478 [2021-05-03 14:05:41,401 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:41,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:41,402 INFO L82 PathProgramCache]: Analyzing trace with hash 76613133, now seen corresponding path program 182 times [2021-05-03 14:05:41,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:41,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49490315] [2021-05-03 14:05:41,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:41,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49490315] [2021-05-03 14:05:41,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616640949] [2021-05-03 14:05:41,479 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 [2021-05-03 14:05:41,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:41,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:41,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:41,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:41,551 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:41,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:41,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:05:41,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949956494] [2021-05-03 14:05:41,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:05:41,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:41,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:05:41,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:05:41,552 INFO L87 Difference]: Start difference. First operand 8622 states and 26126 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) [2021-05-03 14:05:41,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:41,744 INFO L93 Difference]: Finished difference Result 14571 states and 43929 transitions. [2021-05-03 14:05:41,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:05:41,745 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 [2021-05-03 14:05:41,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:41,763 INFO L225 Difference]: With dead ends: 14571 [2021-05-03 14:05:41,763 INFO L226 Difference]: Without dead ends: 14571 [2021-05-03 14:05:41,763 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 152.8ms TimeCoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:05:41,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14571 states. [2021-05-03 14:05:41,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14571 to 13534. [2021-05-03 14:05:41,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13534 states, 13533 states have (on average 3.05660237936895) internal successors, (41365), 13533 states have internal predecessors, (41365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:41,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13534 states to 13534 states and 41365 transitions. [2021-05-03 14:05:41,944 INFO L78 Accepts]: Start accepts. Automaton has 13534 states and 41365 transitions. Word has length 22 [2021-05-03 14:05:41,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:41,944 INFO L480 AbstractCegarLoop]: Abstraction has 13534 states and 41365 transitions. [2021-05-03 14:05:41,944 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) [2021-05-03 14:05:41,944 INFO L276 IsEmpty]: Start isEmpty. Operand 13534 states and 41365 transitions. [2021-05-03 14:05:41,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:41,951 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:41,951 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:42,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10479 [2021-05-03 14:05:42,152 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:42,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:42,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1559748071, now seen corresponding path program 183 times [2021-05-03 14:05:42,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:42,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283739801] [2021-05-03 14:05:42,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:42,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283739801] [2021-05-03 14:05:42,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174636774] [2021-05-03 14:05:42,233 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 [2021-05-03 14:05:42,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:05:42,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:42,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:42,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:42,330 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:42,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:42,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:05:42,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616936834] [2021-05-03 14:05:42,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:05:42,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:42,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:05:42,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:05:42,331 INFO L87 Difference]: Start difference. First operand 13534 states and 41365 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) [2021-05-03 14:05:42,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:42,644 INFO L93 Difference]: Finished difference Result 19456 states and 59104 transitions. [2021-05-03 14:05:42,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:05:42,644 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 [2021-05-03 14:05:42,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:42,673 INFO L225 Difference]: With dead ends: 19456 [2021-05-03 14:05:42,673 INFO L226 Difference]: Without dead ends: 19456 [2021-05-03 14:05:42,673 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 242.2ms TimeCoverageRelationStatistics Valid=411, Invalid=779, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:05:42,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19456 states. [2021-05-03 14:05:42,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19456 to 17545. [2021-05-03 14:05:42,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17545 states, 17544 states have (on average 3.0747264021887823) internal successors, (53943), 17544 states have internal predecessors, (53943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:42,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17545 states to 17545 states and 53943 transitions. [2021-05-03 14:05:42,933 INFO L78 Accepts]: Start accepts. Automaton has 17545 states and 53943 transitions. Word has length 22 [2021-05-03 14:05:42,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:42,933 INFO L480 AbstractCegarLoop]: Abstraction has 17545 states and 53943 transitions. [2021-05-03 14:05:42,933 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) [2021-05-03 14:05:42,933 INFO L276 IsEmpty]: Start isEmpty. Operand 17545 states and 53943 transitions. [2021-05-03 14:05:42,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:42,943 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:42,943 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:43,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10480,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:43,157 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:43,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:43,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1491148885, now seen corresponding path program 184 times [2021-05-03 14:05:43,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:43,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105626810] [2021-05-03 14:05:43,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:43,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:43,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105626810] [2021-05-03 14:05:43,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185731957] [2021-05-03 14:05:43,225 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 [2021-05-03 14:05:43,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:43,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:43,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:43,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:43,333 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:43,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:43,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:05:43,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618947015] [2021-05-03 14:05:43,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:05:43,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:43,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:05:43,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:05:43,333 INFO L87 Difference]: Start difference. First operand 17545 states and 53943 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) [2021-05-03 14:05:43,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:43,663 INFO L93 Difference]: Finished difference Result 24132 states and 73287 transitions. [2021-05-03 14:05:43,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:05:43,672 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 [2021-05-03 14:05:43,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:43,707 INFO L225 Difference]: With dead ends: 24132 [2021-05-03 14:05:43,707 INFO L226 Difference]: Without dead ends: 24132 [2021-05-03 14:05:43,707 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 164.9ms TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:05:43,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24132 states. [2021-05-03 14:05:43,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24132 to 13806. [2021-05-03 14:05:43,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13806 states, 13805 states have (on average 3.0678739587106123) internal successors, (42352), 13805 states have internal predecessors, (42352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:43,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13806 states to 13806 states and 42352 transitions. [2021-05-03 14:05:43,977 INFO L78 Accepts]: Start accepts. Automaton has 13806 states and 42352 transitions. Word has length 22 [2021-05-03 14:05:43,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:43,977 INFO L480 AbstractCegarLoop]: Abstraction has 13806 states and 42352 transitions. [2021-05-03 14:05:43,977 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) [2021-05-03 14:05:43,977 INFO L276 IsEmpty]: Start isEmpty. Operand 13806 states and 42352 transitions. [2021-05-03 14:05:43,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:43,985 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:43,985 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:44,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10481,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:44,200 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:44,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:44,200 INFO L82 PathProgramCache]: Analyzing trace with hash 223691707, now seen corresponding path program 185 times [2021-05-03 14:05:44,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:44,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283730123] [2021-05-03 14:05:44,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:44,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:44,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283730123] [2021-05-03 14:05:44,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216990825] [2021-05-03 14:05:44,270 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 [2021-05-03 14:05:44,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:05:44,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:44,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:44,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:44,338 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:44,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:44,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:05:44,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223561942] [2021-05-03 14:05:44,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:05:44,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:44,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:05:44,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:05:44,339 INFO L87 Difference]: Start difference. First operand 13806 states and 42352 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) [2021-05-03 14:05:44,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:44,595 INFO L93 Difference]: Finished difference Result 20948 states and 63957 transitions. [2021-05-03 14:05:44,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:05:44,596 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 [2021-05-03 14:05:44,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:44,625 INFO L225 Difference]: With dead ends: 20948 [2021-05-03 14:05:44,625 INFO L226 Difference]: Without dead ends: 20948 [2021-05-03 14:05:44,625 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 151.7ms TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:05:44,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20948 states. [2021-05-03 14:05:44,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20948 to 19052. [2021-05-03 14:05:44,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19052 states, 19051 states have (on average 3.0863996640596296) internal successors, (58799), 19051 states have internal predecessors, (58799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:44,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19052 states to 19052 states and 58799 transitions. [2021-05-03 14:05:44,926 INFO L78 Accepts]: Start accepts. Automaton has 19052 states and 58799 transitions. Word has length 22 [2021-05-03 14:05:44,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:44,926 INFO L480 AbstractCegarLoop]: Abstraction has 19052 states and 58799 transitions. [2021-05-03 14:05:44,926 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) [2021-05-03 14:05:44,926 INFO L276 IsEmpty]: Start isEmpty. Operand 19052 states and 58799 transitions. [2021-05-03 14:05:44,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:44,935 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:44,935 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:45,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10482,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:45,135 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:45,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:45,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1706826645, now seen corresponding path program 186 times [2021-05-03 14:05:45,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:45,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575407903] [2021-05-03 14:05:45,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:45,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:45,224 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:45,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575407903] [2021-05-03 14:05:45,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342498165] [2021-05-03 14:05:45,224 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 [2021-05-03 14:05:45,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:05:45,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:45,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:45,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:45,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:45,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:05:45,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435662882] [2021-05-03 14:05:45,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:05:45,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:45,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:05:45,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:05:45,304 INFO L87 Difference]: Start difference. First operand 19052 states and 58799 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) [2021-05-03 14:05:45,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:45,621 INFO L93 Difference]: Finished difference Result 28543 states and 87595 transitions. [2021-05-03 14:05:45,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:05:45,622 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 [2021-05-03 14:05:45,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:45,667 INFO L225 Difference]: With dead ends: 28543 [2021-05-03 14:05:45,668 INFO L226 Difference]: Without dead ends: 28543 [2021-05-03 14:05:45,668 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 231.7ms TimeCoverageRelationStatistics Valid=410, Invalid=780, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:05:45,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28543 states. [2021-05-03 14:05:46,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28543 to 26854. [2021-05-03 14:05:46,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26854 states, 26853 states have (on average 3.0954455740513165) internal successors, (83122), 26853 states have internal predecessors, (83122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:46,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26854 states to 26854 states and 83122 transitions. [2021-05-03 14:05:46,082 INFO L78 Accepts]: Start accepts. Automaton has 26854 states and 83122 transitions. Word has length 22 [2021-05-03 14:05:46,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:46,083 INFO L480 AbstractCegarLoop]: Abstraction has 26854 states and 83122 transitions. [2021-05-03 14:05:46,083 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) [2021-05-03 14:05:46,083 INFO L276 IsEmpty]: Start isEmpty. Operand 26854 states and 83122 transitions. [2021-05-03 14:05:46,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:46,093 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:46,093 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:46,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10483,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:46,307 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:46,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:46,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1627873617, now seen corresponding path program 187 times [2021-05-03 14:05:46,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:46,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999029383] [2021-05-03 14:05:46,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:46,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:46,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999029383] [2021-05-03 14:05:46,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609860891] [2021-05-03 14:05:46,357 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 [2021-05-03 14:05:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:46,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:46,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:46,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:46,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:05:46,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62052117] [2021-05-03 14:05:46,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:46,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:46,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:46,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:46,412 INFO L87 Difference]: Start difference. First operand 26854 states and 83122 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) [2021-05-03 14:05:46,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:46,654 INFO L93 Difference]: Finished difference Result 27245 states and 83974 transitions. [2021-05-03 14:05:46,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:05:46,655 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 [2021-05-03 14:05:46,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:46,704 INFO L225 Difference]: With dead ends: 27245 [2021-05-03 14:05:46,704 INFO L226 Difference]: Without dead ends: 27241 [2021-05-03 14:05:46,704 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 109.5ms TimeCoverageRelationStatistics Valid=204, Invalid=348, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:05:46,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27241 states. [2021-05-03 14:05:47,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27241 to 25289. [2021-05-03 14:05:47,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25289 states, 25288 states have (on average 3.0879863967099017) internal successors, (78089), 25288 states have internal predecessors, (78089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:47,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25289 states to 25289 states and 78089 transitions. [2021-05-03 14:05:47,175 INFO L78 Accepts]: Start accepts. Automaton has 25289 states and 78089 transitions. Word has length 22 [2021-05-03 14:05:47,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:47,175 INFO L480 AbstractCegarLoop]: Abstraction has 25289 states and 78089 transitions. [2021-05-03 14:05:47,175 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) [2021-05-03 14:05:47,175 INFO L276 IsEmpty]: Start isEmpty. Operand 25289 states and 78089 transitions. [2021-05-03 14:05:47,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:47,358 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:47,358 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:47,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10484,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:47,559 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:47,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:47,559 INFO L82 PathProgramCache]: Analyzing trace with hash -949344619, now seen corresponding path program 188 times [2021-05-03 14:05:47,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:47,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921188950] [2021-05-03 14:05:47,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:47,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:47,612 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:47,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921188950] [2021-05-03 14:05:47,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540769506] [2021-05-03 14:05:47,613 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 [2021-05-03 14:05:47,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:47,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:47,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:47,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:47,687 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 26 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:47,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:47,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:05:47,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848670121] [2021-05-03 14:05:47,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:47,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:47,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:47,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:47,689 INFO L87 Difference]: Start difference. First operand 25289 states and 78089 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) [2021-05-03 14:05:47,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:47,857 INFO L93 Difference]: Finished difference Result 27144 states and 83198 transitions. [2021-05-03 14:05:47,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:05:47,857 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 [2021-05-03 14:05:47,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:47,906 INFO L225 Difference]: With dead ends: 27144 [2021-05-03 14:05:47,906 INFO L226 Difference]: Without dead ends: 27144 [2021-05-03 14:05:47,907 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=126, Invalid=180, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:47,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27144 states. [2021-05-03 14:05:48,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27144 to 25336. [2021-05-03 14:05:48,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25336 states, 25335 states have (on average 3.08656009473061) internal successors, (78198), 25335 states have internal predecessors, (78198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:48,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25336 states to 25336 states and 78198 transitions. [2021-05-03 14:05:48,368 INFO L78 Accepts]: Start accepts. Automaton has 25336 states and 78198 transitions. Word has length 22 [2021-05-03 14:05:48,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:48,368 INFO L480 AbstractCegarLoop]: Abstraction has 25336 states and 78198 transitions. [2021-05-03 14:05:48,368 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) [2021-05-03 14:05:48,368 INFO L276 IsEmpty]: Start isEmpty. Operand 25336 states and 78198 transitions. [2021-05-03 14:05:48,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:48,378 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:48,378 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:48,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10485 [2021-05-03 14:05:48,593 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:48,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:48,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1616575343, now seen corresponding path program 189 times [2021-05-03 14:05:48,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:48,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966501083] [2021-05-03 14:05:48,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:48,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:48,654 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:48,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966501083] [2021-05-03 14:05:48,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335391537] [2021-05-03 14:05:48,654 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 [2021-05-03 14:05:48,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:05:48,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:48,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:48,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:48,722 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:48,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:48,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:05:48,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592210518] [2021-05-03 14:05:48,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:48,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:48,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:48,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:48,722 INFO L87 Difference]: Start difference. First operand 25336 states and 78198 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) [2021-05-03 14:05:48,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:48,911 INFO L93 Difference]: Finished difference Result 28314 states and 86669 transitions. [2021-05-03 14:05:48,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:05:48,912 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 [2021-05-03 14:05:48,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:48,964 INFO L225 Difference]: With dead ends: 28314 [2021-05-03 14:05:48,964 INFO L226 Difference]: Without dead ends: 28314 [2021-05-03 14:05:48,964 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=163, Invalid=257, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:05:48,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28314 states. [2021-05-03 14:05:49,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28314 to 22217. [2021-05-03 14:05:49,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22217 states, 22216 states have (on average 3.076026287360461) internal successors, (68337), 22216 states have internal predecessors, (68337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:49,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22217 states to 22217 states and 68337 transitions. [2021-05-03 14:05:49,408 INFO L78 Accepts]: Start accepts. Automaton has 22217 states and 68337 transitions. Word has length 22 [2021-05-03 14:05:49,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:49,408 INFO L480 AbstractCegarLoop]: Abstraction has 22217 states and 68337 transitions. [2021-05-03 14:05:49,408 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) [2021-05-03 14:05:49,409 INFO L276 IsEmpty]: Start isEmpty. Operand 22217 states and 68337 transitions. [2021-05-03 14:05:49,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:49,418 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:49,418 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:49,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10486 [2021-05-03 14:05:49,629 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:49,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:49,629 INFO L82 PathProgramCache]: Analyzing trace with hash -444284459, now seen corresponding path program 190 times [2021-05-03 14:05:49,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:49,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924974939] [2021-05-03 14:05:49,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:49,693 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:49,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924974939] [2021-05-03 14:05:49,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804279152] [2021-05-03 14:05:49,697 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 [2021-05-03 14:05:49,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:49,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:49,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:49,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:49,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:49,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:05:49,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537615787] [2021-05-03 14:05:49,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:49,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:49,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:49,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:49,779 INFO L87 Difference]: Start difference. First operand 22217 states and 68337 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) [2021-05-03 14:05:49,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:49,983 INFO L93 Difference]: Finished difference Result 40934 states and 126275 transitions. [2021-05-03 14:05:49,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:05:49,985 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 [2021-05-03 14:05:49,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:50,062 INFO L225 Difference]: With dead ends: 40934 [2021-05-03 14:05:50,062 INFO L226 Difference]: Without dead ends: 40934 [2021-05-03 14:05:50,062 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:05:50,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40934 states. [2021-05-03 14:05:50,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40934 to 32281. [2021-05-03 14:05:50,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32281 states, 32280 states have (on average 3.1012391573729863) internal successors, (100108), 32280 states have internal predecessors, (100108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:50,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32281 states to 32281 states and 100108 transitions. [2021-05-03 14:05:50,943 INFO L78 Accepts]: Start accepts. Automaton has 32281 states and 100108 transitions. Word has length 22 [2021-05-03 14:05:50,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:50,944 INFO L480 AbstractCegarLoop]: Abstraction has 32281 states and 100108 transitions. [2021-05-03 14:05:50,944 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) [2021-05-03 14:05:50,944 INFO L276 IsEmpty]: Start isEmpty. Operand 32281 states and 100108 transitions. [2021-05-03 14:05:50,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:50,953 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:50,953 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:51,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10487 [2021-05-03 14:05:51,166 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:51,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:51,166 INFO L82 PathProgramCache]: Analyzing trace with hash 93571119, now seen corresponding path program 191 times [2021-05-03 14:05:51,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:51,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384239864] [2021-05-03 14:05:51,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:51,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:51,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384239864] [2021-05-03 14:05:51,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243782662] [2021-05-03 14:05:51,226 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 [2021-05-03 14:05:51,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:05:51,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:51,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:51,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:51,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:51,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:05:51,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392920997] [2021-05-03 14:05:51,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:51,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:51,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:51,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:51,295 INFO L87 Difference]: Start difference. First operand 32281 states and 100108 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) [2021-05-03 14:05:51,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:51,487 INFO L93 Difference]: Finished difference Result 45762 states and 141598 transitions. [2021-05-03 14:05:51,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:05:51,488 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 [2021-05-03 14:05:51,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:51,569 INFO L225 Difference]: With dead ends: 45762 [2021-05-03 14:05:51,569 INFO L226 Difference]: Without dead ends: 45762 [2021-05-03 14:05:51,569 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:05:51,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45762 states. [2021-05-03 14:05:52,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45762 to 45505. [2021-05-03 14:05:52,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45505 states, 45504 states have (on average 3.1023426511954995) internal successors, (141169), 45504 states have internal predecessors, (141169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:52,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45505 states to 45505 states and 141169 transitions. [2021-05-03 14:05:52,392 INFO L78 Accepts]: Start accepts. Automaton has 45505 states and 141169 transitions. Word has length 22 [2021-05-03 14:05:52,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:52,392 INFO L480 AbstractCegarLoop]: Abstraction has 45505 states and 141169 transitions. [2021-05-03 14:05:52,392 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) [2021-05-03 14:05:52,392 INFO L276 IsEmpty]: Start isEmpty. Operand 45505 states and 141169 transitions. [2021-05-03 14:05:52,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:52,406 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:52,406 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:52,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10488 [2021-05-03 14:05:52,621 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:52,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:52,621 INFO L82 PathProgramCache]: Analyzing trace with hash -412775147, now seen corresponding path program 192 times [2021-05-03 14:05:52,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:52,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908982159] [2021-05-03 14:05:52,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:52,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:52,686 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:52,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908982159] [2021-05-03 14:05:52,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447901940] [2021-05-03 14:05:52,686 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 [2021-05-03 14:05:52,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:05:52,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:52,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:52,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:52,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:52,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:05:52,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774813368] [2021-05-03 14:05:52,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:05:52,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:52,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:05:52,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:05:52,810 INFO L87 Difference]: Start difference. First operand 45505 states and 141169 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) [2021-05-03 14:05:53,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:53,081 INFO L93 Difference]: Finished difference Result 46432 states and 143526 transitions. [2021-05-03 14:05:53,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:05:53,082 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 [2021-05-03 14:05:53,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:53,171 INFO L225 Difference]: With dead ends: 46432 [2021-05-03 14:05:53,172 INFO L226 Difference]: Without dead ends: 46432 [2021-05-03 14:05:53,172 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 125.0ms TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:05:53,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46432 states. [2021-05-03 14:05:54,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46432 to 45128. [2021-05-03 14:05:54,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45128 states, 45127 states have (on average 3.1029317260176836) internal successors, (140026), 45127 states have internal predecessors, (140026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:54,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45128 states to 45128 states and 140026 transitions. [2021-05-03 14:05:54,277 INFO L78 Accepts]: Start accepts. Automaton has 45128 states and 140026 transitions. Word has length 22 [2021-05-03 14:05:54,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:54,277 INFO L480 AbstractCegarLoop]: Abstraction has 45128 states and 140026 transitions. [2021-05-03 14:05:54,278 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) [2021-05-03 14:05:54,278 INFO L276 IsEmpty]: Start isEmpty. Operand 45128 states and 140026 transitions. [2021-05-03 14:05:54,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:54,293 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:54,293 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:54,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10489,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:54,508 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:54,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:54,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1070359791, now seen corresponding path program 193 times [2021-05-03 14:05:54,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:54,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671802739] [2021-05-03 14:05:54,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:54,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:54,902 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:54,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671802739] [2021-05-03 14:05:54,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363800570] [2021-05-03 14:05:54,902 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 [2021-05-03 14:05:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:54,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:54,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:54,968 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:54,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:54,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:05:54,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473421926] [2021-05-03 14:05:54,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:05:54,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:54,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:05:54,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:05:54,969 INFO L87 Difference]: Start difference. First operand 45128 states and 140026 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) [2021-05-03 14:05:55,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:55,446 INFO L93 Difference]: Finished difference Result 49791 states and 153978 transitions. [2021-05-03 14:05:55,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:05:55,446 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 [2021-05-03 14:05:55,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:55,530 INFO L225 Difference]: With dead ends: 49791 [2021-05-03 14:05:55,530 INFO L226 Difference]: Without dead ends: 49791 [2021-05-03 14:05:55,530 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 200.6ms TimeCoverageRelationStatistics Valid=285, Invalid=585, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:05:55,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49791 states. [2021-05-03 14:05:56,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49791 to 49280. [2021-05-03 14:05:56,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49280 states, 49279 states have (on average 3.102295095273849) internal successors, (152878), 49279 states have internal predecessors, (152878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:56,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49280 states to 49280 states and 152878 transitions. [2021-05-03 14:05:56,552 INFO L78 Accepts]: Start accepts. Automaton has 49280 states and 152878 transitions. Word has length 22 [2021-05-03 14:05:56,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:56,552 INFO L480 AbstractCegarLoop]: Abstraction has 49280 states and 152878 transitions. [2021-05-03 14:05:56,552 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) [2021-05-03 14:05:56,552 INFO L276 IsEmpty]: Start isEmpty. Operand 49280 states and 152878 transitions. [2021-05-03 14:05:56,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:56,567 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:56,567 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:56,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10490 [2021-05-03 14:05:56,781 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:56,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:56,782 INFO L82 PathProgramCache]: Analyzing trace with hash -197097387, now seen corresponding path program 194 times [2021-05-03 14:05:56,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:56,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043515217] [2021-05-03 14:05:56,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:56,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:56,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043515217] [2021-05-03 14:05:56,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842154132] [2021-05-03 14:05:56,944 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 [2021-05-03 14:05:56,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:56,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:56,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:56,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:57,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:57,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:05:57,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007503125] [2021-05-03 14:05:57,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:05:57,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:57,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:05:57,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:05:57,020 INFO L87 Difference]: Start difference. First operand 49280 states and 152878 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) [2021-05-03 14:05:57,354 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-05-03 14:05:57,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:57,644 INFO L93 Difference]: Finished difference Result 52302 states and 161626 transitions. [2021-05-03 14:05:57,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 14:05:57,645 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 [2021-05-03 14:05:57,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:57,885 INFO L225 Difference]: With dead ends: 52302 [2021-05-03 14:05:57,885 INFO L226 Difference]: Without dead ends: 52302 [2021-05-03 14:05:57,885 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 481.7ms TimeCoverageRelationStatistics Valid=525, Invalid=1035, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 14:05:57,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52302 states. [2021-05-03 14:05:58,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52302 to 51634. [2021-05-03 14:05:58,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51634 states, 51633 states have (on average 3.101311176960471) internal successors, (160130), 51633 states have internal predecessors, (160130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:58,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51634 states to 51634 states and 160130 transitions. [2021-05-03 14:05:58,888 INFO L78 Accepts]: Start accepts. Automaton has 51634 states and 160130 transitions. Word has length 22 [2021-05-03 14:05:58,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:58,888 INFO L480 AbstractCegarLoop]: Abstraction has 51634 states and 160130 transitions. [2021-05-03 14:05:58,888 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) [2021-05-03 14:05:58,888 INFO L276 IsEmpty]: Start isEmpty. Operand 51634 states and 160130 transitions. [2021-05-03 14:05:58,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:05:58,904 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:58,904 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:59,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10491,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:59,119 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:59,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:59,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1546669833, now seen corresponding path program 195 times [2021-05-03 14:05:59,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:59,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232025729] [2021-05-03 14:05:59,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:59,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232025729] [2021-05-03 14:05:59,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432650083] [2021-05-03 14:05:59,434 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) [2021-05-03 14:05:59,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:05:59,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:59,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:05:59,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:59,510 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:05:59,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:59,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:05:59,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953939615] [2021-05-03 14:05:59,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:59,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:59,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:59,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:59,511 INFO L87 Difference]: Start difference. First operand 51634 states and 160130 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) [2021-05-03 14:05:59,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:59,895 INFO L93 Difference]: Finished difference Result 52382 states and 162119 transitions. [2021-05-03 14:05:59,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:05:59,895 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 22 [2021-05-03 14:05:59,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:00,142 INFO L225 Difference]: With dead ends: 52382 [2021-05-03 14:06:00,143 INFO L226 Difference]: Without dead ends: 52376 [2021-05-03 14:06:00,143 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 407.5ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:06:00,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52376 states. [2021-05-03 14:06:00,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52376 to 52177. [2021-05-03 14:06:00,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52177 states, 52176 states have (on average 3.102135081263416) internal successors, (161857), 52176 states have internal predecessors, (161857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:01,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52177 states to 52177 states and 161857 transitions. [2021-05-03 14:06:01,069 INFO L78 Accepts]: Start accepts. Automaton has 52177 states and 161857 transitions. Word has length 22 [2021-05-03 14:06:01,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:01,069 INFO L480 AbstractCegarLoop]: Abstraction has 52177 states and 161857 transitions. [2021-05-03 14:06:01,069 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) [2021-05-03 14:06:01,069 INFO L276 IsEmpty]: Start isEmpty. Operand 52177 states and 161857 transitions. [2021-05-03 14:06:01,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:06:01,085 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:01,085 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:01,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10492,197 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:01,299 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:01,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:01,300 INFO L82 PathProgramCache]: Analyzing trace with hash 471577549, now seen corresponding path program 196 times [2021-05-03 14:06:01,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:01,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066782834] [2021-05-03 14:06:01,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:01,378 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:01,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066782834] [2021-05-03 14:06:01,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661263383] [2021-05-03 14:06:01,378 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 [2021-05-03 14:06:01,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:06:01,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:01,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:06:01,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:01,535 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:06:01,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:01,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:06:01,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868501589] [2021-05-03 14:06:01,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:06:01,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:01,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:06:01,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:06:01,535 INFO L87 Difference]: Start difference. First operand 52177 states and 161857 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) [2021-05-03 14:06:02,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:02,088 INFO L93 Difference]: Finished difference Result 71897 states and 222309 transitions. [2021-05-03 14:06:02,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:06:02,089 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 [2021-05-03 14:06:02,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:02,253 INFO L225 Difference]: With dead ends: 71897 [2021-05-03 14:06:02,253 INFO L226 Difference]: Without dead ends: 71897 [2021-05-03 14:06:02,253 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 171.5ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:06:02,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71897 states. [2021-05-03 14:06:03,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71897 to 70150. [2021-05-03 14:06:03,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70150 states, 70149 states have (on average 3.098347802534605) internal successors, (217346), 70149 states have internal predecessors, (217346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:04,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70150 states to 70150 states and 217346 transitions. [2021-05-03 14:06:04,095 INFO L78 Accepts]: Start accepts. Automaton has 70150 states and 217346 transitions. Word has length 22 [2021-05-03 14:06:04,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:04,095 INFO L480 AbstractCegarLoop]: Abstraction has 70150 states and 217346 transitions. [2021-05-03 14:06:04,096 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) [2021-05-03 14:06:04,096 INFO L276 IsEmpty]: Start isEmpty. Operand 70150 states and 217346 transitions. [2021-05-03 14:06:04,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:06:04,148 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:04,148 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:04,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10493,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:04,348 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:04,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:04,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1009433127, now seen corresponding path program 197 times [2021-05-03 14:06:04,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:04,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226014180] [2021-05-03 14:06:04,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:04,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226014180] [2021-05-03 14:06:04,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719785601] [2021-05-03 14:06:04,416 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 [2021-05-03 14:06:04,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:06:04,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:04,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:06:04,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:04,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:04,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:06:04,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508307240] [2021-05-03 14:06:04,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:06:04,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:04,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:06:04,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:04,478 INFO L87 Difference]: Start difference. First operand 70150 states and 217346 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) [2021-05-03 14:06:04,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:04,848 INFO L93 Difference]: Finished difference Result 81568 states and 251022 transitions. [2021-05-03 14:06:04,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:06:04,848 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 [2021-05-03 14:06:04,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:04,998 INFO L225 Difference]: With dead ends: 81568 [2021-05-03 14:06:04,998 INFO L226 Difference]: Without dead ends: 81568 [2021-05-03 14:06:04,998 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 103.4ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:06:05,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81568 states. [2021-05-03 14:06:06,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81568 to 71366. [2021-05-03 14:06:06,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71366 states, 71365 states have (on average 3.0934491697610875) internal successors, (220764), 71365 states have internal predecessors, (220764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:06,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71366 states to 71366 states and 220764 transitions. [2021-05-03 14:06:06,778 INFO L78 Accepts]: Start accepts. Automaton has 71366 states and 220764 transitions. Word has length 22 [2021-05-03 14:06:06,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:06,778 INFO L480 AbstractCegarLoop]: Abstraction has 71366 states and 220764 transitions. [2021-05-03 14:06:06,778 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) [2021-05-03 14:06:06,778 INFO L276 IsEmpty]: Start isEmpty. Operand 71366 states and 220764 transitions. [2021-05-03 14:06:06,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:06:06,795 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:06,795 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:07,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10494,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:07,009 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:07,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:07,010 INFO L82 PathProgramCache]: Analyzing trace with hash 503086861, now seen corresponding path program 198 times [2021-05-03 14:06:07,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:07,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894454831] [2021-05-03 14:06:07,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:07,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:07,073 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:07,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894454831] [2021-05-03 14:06:07,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516699380] [2021-05-03 14:06:07,074 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 [2021-05-03 14:06:07,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:06:07,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:07,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:06:07,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:07,137 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:07,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:07,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:06:07,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016013768] [2021-05-03 14:06:07,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:06:07,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:07,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:06:07,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:07,138 INFO L87 Difference]: Start difference. First operand 71366 states and 220764 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) [2021-05-03 14:06:07,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:07,950 INFO L93 Difference]: Finished difference Result 104720 states and 323372 transitions. [2021-05-03 14:06:07,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:06:07,951 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 [2021-05-03 14:06:07,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:08,195 INFO L225 Difference]: With dead ends: 104720 [2021-05-03 14:06:08,195 INFO L226 Difference]: Without dead ends: 104720 [2021-05-03 14:06:08,195 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 135.2ms TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:06:08,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104720 states. [2021-05-03 14:06:10,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104720 to 99727. [2021-05-03 14:06:10,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99727 states, 99726 states have (on average 3.0966046968694223) internal successors, (308812), 99726 states have internal predecessors, (308812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:11,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99727 states to 99727 states and 308812 transitions. [2021-05-03 14:06:11,183 INFO L78 Accepts]: Start accepts. Automaton has 99727 states and 308812 transitions. Word has length 22 [2021-05-03 14:06:11,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:11,183 INFO L480 AbstractCegarLoop]: Abstraction has 99727 states and 308812 transitions. [2021-05-03 14:06:11,183 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) [2021-05-03 14:06:11,184 INFO L276 IsEmpty]: Start isEmpty. Operand 99727 states and 308812 transitions. [2021-05-03 14:06:11,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:06:11,205 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:11,205 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:11,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10495 [2021-05-03 14:06:11,420 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:11,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:11,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1986221799, now seen corresponding path program 199 times [2021-05-03 14:06:11,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:11,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017250383] [2021-05-03 14:06:11,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:11,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:11,487 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:11,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017250383] [2021-05-03 14:06:11,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813566020] [2021-05-03 14:06:11,487 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 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 [2021-05-03 14:06:11,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:11,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:06:11,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:11,564 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:11,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:11,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:06:11,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520226116] [2021-05-03 14:06:11,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:06:11,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:11,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:06:11,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:11,564 INFO L87 Difference]: Start difference. First operand 99727 states and 308812 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) [2021-05-03 14:06:12,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:12,234 INFO L93 Difference]: Finished difference Result 122524 states and 378377 transitions. [2021-05-03 14:06:12,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:06:12,235 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 [2021-05-03 14:06:12,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:12,534 INFO L225 Difference]: With dead ends: 122524 [2021-05-03 14:06:12,534 INFO L226 Difference]: Without dead ends: 122524 [2021-05-03 14:06:12,535 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 218.8ms TimeCoverageRelationStatistics Valid=382, Invalid=740, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 14:06:12,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122524 states. [2021-05-03 14:06:14,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122524 to 119170. [2021-05-03 14:06:15,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119170 states, 119169 states have (on average 3.0954358935629234) internal successors, (368880), 119169 states have internal predecessors, (368880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:15,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119170 states to 119170 states and 368880 transitions. [2021-05-03 14:06:15,483 INFO L78 Accepts]: Start accepts. Automaton has 119170 states and 368880 transitions. Word has length 22 [2021-05-03 14:06:15,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:15,483 INFO L480 AbstractCegarLoop]: Abstraction has 119170 states and 368880 transitions. [2021-05-03 14:06:15,483 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) [2021-05-03 14:06:15,483 INFO L276 IsEmpty]: Start isEmpty. Operand 119170 states and 368880 transitions. [2021-05-03 14:06:15,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:06:15,506 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:15,506 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:15,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10496 [2021-05-03 14:06:15,721 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:15,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:15,721 INFO L82 PathProgramCache]: Analyzing trace with hash -2047516429, now seen corresponding path program 200 times [2021-05-03 14:06:15,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:15,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879437702] [2021-05-03 14:06:15,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:15,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:15,792 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:15,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879437702] [2021-05-03 14:06:15,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392950084] [2021-05-03 14:06:15,792 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) [2021-05-03 14:06:15,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:06:15,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:15,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:06:15,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:15,868 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:15,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:15,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:06:15,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639651584] [2021-05-03 14:06:15,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:15,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:15,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:15,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:15,869 INFO L87 Difference]: Start difference. First operand 119170 states and 368880 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) [2021-05-03 14:06:17,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:17,119 INFO L93 Difference]: Finished difference Result 149360 states and 458856 transitions. [2021-05-03 14:06:17,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:06:17,119 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 [2021-05-03 14:06:17,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:17,469 INFO L225 Difference]: With dead ends: 149360 [2021-05-03 14:06:17,469 INFO L226 Difference]: Without dead ends: 149360 [2021-05-03 14:06:17,469 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 153.7ms TimeCoverageRelationStatistics Valid=265, Invalid=491, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:06:17,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149360 states. [2021-05-03 14:06:19,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149360 to 66855. [2021-05-03 14:06:19,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66855 states, 66854 states have (on average 3.0857241152361863) internal successors, (206293), 66854 states have internal predecessors, (206293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:19,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66855 states to 66855 states and 206293 transitions. [2021-05-03 14:06:19,646 INFO L78 Accepts]: Start accepts. Automaton has 66855 states and 206293 transitions. Word has length 22 [2021-05-03 14:06:19,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:19,646 INFO L480 AbstractCegarLoop]: Abstraction has 66855 states and 206293 transitions. [2021-05-03 14:06:19,646 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) [2021-05-03 14:06:19,646 INFO L276 IsEmpty]: Start isEmpty. Operand 66855 states and 206293 transitions. [2021-05-03 14:06:19,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:06:19,664 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:19,664 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:19,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10497 [2021-05-03 14:06:19,880 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:19,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:19,880 INFO L82 PathProgramCache]: Analyzing trace with hash -564381491, now seen corresponding path program 201 times [2021-05-03 14:06:19,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:19,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082577502] [2021-05-03 14:06:19,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:19,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:19,951 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:19,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082577502] [2021-05-03 14:06:19,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134413779] [2021-05-03 14:06:19,952 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 [2021-05-03 14:06:19,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:06:19,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:19,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:06:19,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:20,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:20,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:06:20,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815057971] [2021-05-03 14:06:20,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:20,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:20,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:20,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:20,069 INFO L87 Difference]: Start difference. First operand 66855 states and 206293 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) [2021-05-03 14:06:20,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:20,624 INFO L93 Difference]: Finished difference Result 89497 states and 274720 transitions. [2021-05-03 14:06:20,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:06:20,625 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 [2021-05-03 14:06:20,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:20,812 INFO L225 Difference]: With dead ends: 89497 [2021-05-03 14:06:20,812 INFO L226 Difference]: Without dead ends: 89497 [2021-05-03 14:06:20,812 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 251.0ms TimeCoverageRelationStatistics Valid=409, Invalid=781, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:06:20,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89497 states. [2021-05-03 14:06:22,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89497 to 43123. [2021-05-03 14:06:22,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43123 states, 43122 states have (on average 3.0917397152265664) internal successors, (133322), 43122 states have internal predecessors, (133322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:22,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43123 states to 43123 states and 133322 transitions. [2021-05-03 14:06:22,565 INFO L78 Accepts]: Start accepts. Automaton has 43123 states and 133322 transitions. Word has length 22 [2021-05-03 14:06:22,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:22,565 INFO L480 AbstractCegarLoop]: Abstraction has 43123 states and 133322 transitions. [2021-05-03 14:06:22,565 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) [2021-05-03 14:06:22,565 INFO L276 IsEmpty]: Start isEmpty. Operand 43123 states and 133322 transitions. [2021-05-03 14:06:22,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:06:22,575 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:22,575 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:22,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10498 [2021-05-03 14:06:22,790 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:22,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:22,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1579474701, now seen corresponding path program 202 times [2021-05-03 14:06:22,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:22,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225565609] [2021-05-03 14:06:22,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:22,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:22,849 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:22,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225565609] [2021-05-03 14:06:22,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420196396] [2021-05-03 14:06:22,850 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) [2021-05-03 14:06:22,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:06:22,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:22,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:06:22,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:22,911 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:22,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:22,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:06:22,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839313734] [2021-05-03 14:06:22,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:06:22,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:22,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:06:22,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:22,912 INFO L87 Difference]: Start difference. First operand 43123 states and 133322 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) [2021-05-03 14:06:23,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:23,157 INFO L93 Difference]: Finished difference Result 46015 states and 141473 transitions. [2021-05-03 14:06:23,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:06:23,158 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 [2021-05-03 14:06:23,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:23,231 INFO L225 Difference]: With dead ends: 46015 [2021-05-03 14:06:23,231 INFO L226 Difference]: Without dead ends: 46015 [2021-05-03 14:06:23,231 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:06:23,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46015 states. [2021-05-03 14:06:23,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46015 to 33259. [2021-05-03 14:06:23,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33259 states, 33258 states have (on average 3.08671597811053) internal successors, (102658), 33258 states have internal predecessors, (102658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:24,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33259 states to 33259 states and 102658 transitions. [2021-05-03 14:06:24,069 INFO L78 Accepts]: Start accepts. Automaton has 33259 states and 102658 transitions. Word has length 22 [2021-05-03 14:06:24,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:24,069 INFO L480 AbstractCegarLoop]: Abstraction has 33259 states and 102658 transitions. [2021-05-03 14:06:24,070 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) [2021-05-03 14:06:24,070 INFO L276 IsEmpty]: Start isEmpty. Operand 33259 states and 102658 transitions. [2021-05-03 14:06:24,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:06:24,079 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:24,079 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:24,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10499 [2021-05-03 14:06:24,293 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:24,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:24,293 INFO L82 PathProgramCache]: Analyzing trace with hash 2117330279, now seen corresponding path program 203 times [2021-05-03 14:06:24,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:24,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460434275] [2021-05-03 14:06:24,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:24,356 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:24,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460434275] [2021-05-03 14:06:24,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876141389] [2021-05-03 14:06:24,356 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 [2021-05-03 14:06:24,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:06:24,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:24,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:06:24,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:24,429 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:24,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:24,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:06:24,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836144691] [2021-05-03 14:06:24,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:06:24,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:24,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:06:24,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:24,430 INFO L87 Difference]: Start difference. First operand 33259 states and 102658 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) [2021-05-03 14:06:24,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:24,609 INFO L93 Difference]: Finished difference Result 35745 states and 109875 transitions. [2021-05-03 14:06:24,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:06:24,609 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 [2021-05-03 14:06:24,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:24,664 INFO L225 Difference]: With dead ends: 35745 [2021-05-03 14:06:24,664 INFO L226 Difference]: Without dead ends: 35745 [2021-05-03 14:06:24,664 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:06:24,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35745 states. [2021-05-03 14:06:25,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35745 to 35523. [2021-05-03 14:06:25,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35523 states, 35522 states have (on average 3.083694611789877) internal successors, (109539), 35522 states have internal predecessors, (109539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:25,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35523 states to 35523 states and 109539 transitions. [2021-05-03 14:06:25,502 INFO L78 Accepts]: Start accepts. Automaton has 35523 states and 109539 transitions. Word has length 22 [2021-05-03 14:06:25,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:25,502 INFO L480 AbstractCegarLoop]: Abstraction has 35523 states and 109539 transitions. [2021-05-03 14:06:25,502 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) [2021-05-03 14:06:25,503 INFO L276 IsEmpty]: Start isEmpty. Operand 35523 states and 109539 transitions. [2021-05-03 14:06:25,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:06:25,513 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:25,513 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:25,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10500,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:25,727 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:25,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:25,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1610984013, now seen corresponding path program 204 times [2021-05-03 14:06:25,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:25,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068071445] [2021-05-03 14:06:25,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:25,798 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:25,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068071445] [2021-05-03 14:06:25,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258651267] [2021-05-03 14:06:25,798 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 [2021-05-03 14:06:25,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:06:25,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:25,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:06:25,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:25,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:25,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:06:25,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109582823] [2021-05-03 14:06:25,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:25,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:25,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:25,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:25,860 INFO L87 Difference]: Start difference. First operand 35523 states and 109539 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) [2021-05-03 14:06:26,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:26,291 INFO L93 Difference]: Finished difference Result 36167 states and 111049 transitions. [2021-05-03 14:06:26,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:06:26,291 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 [2021-05-03 14:06:26,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:26,350 INFO L225 Difference]: With dead ends: 36167 [2021-05-03 14:06:26,350 INFO L226 Difference]: Without dead ends: 36167 [2021-05-03 14:06:26,350 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 189.1ms TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:06:26,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36167 states. [2021-05-03 14:06:27,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36167 to 33964. [2021-05-03 14:06:27,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33964 states, 33963 states have (on average 3.083973736124606) internal successors, (104741), 33963 states have internal predecessors, (104741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:27,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33964 states to 33964 states and 104741 transitions. [2021-05-03 14:06:27,219 INFO L78 Accepts]: Start accepts. Automaton has 33964 states and 104741 transitions. Word has length 22 [2021-05-03 14:06:27,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:27,219 INFO L480 AbstractCegarLoop]: Abstraction has 33964 states and 104741 transitions. [2021-05-03 14:06:27,219 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) [2021-05-03 14:06:27,219 INFO L276 IsEmpty]: Start isEmpty. Operand 33964 states and 104741 transitions. [2021-05-03 14:06:27,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:06:27,228 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:27,228 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:27,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10501 [2021-05-03 14:06:27,441 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:27,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:27,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1200848345, now seen corresponding path program 205 times [2021-05-03 14:06:27,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:27,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755507048] [2021-05-03 14:06:27,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:27,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:27,516 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:27,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755507048] [2021-05-03 14:06:27,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498524126] [2021-05-03 14:06:27,516 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 [2021-05-03 14:06:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:27,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:06:27,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:27,599 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:27,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:27,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:06:27,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139121586] [2021-05-03 14:06:27,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:27,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:27,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:27,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:27,599 INFO L87 Difference]: Start difference. First operand 33964 states and 104741 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) [2021-05-03 14:06:27,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:27,900 INFO L93 Difference]: Finished difference Result 36419 states and 111773 transitions. [2021-05-03 14:06:27,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:06:27,900 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 [2021-05-03 14:06:27,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:27,957 INFO L225 Difference]: With dead ends: 36419 [2021-05-03 14:06:27,957 INFO L226 Difference]: Without dead ends: 36419 [2021-05-03 14:06:27,957 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 185.0ms TimeCoverageRelationStatistics Valid=284, Invalid=586, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:06:27,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36419 states. [2021-05-03 14:06:28,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36419 to 34818. [2021-05-03 14:06:28,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34818 states, 34817 states have (on average 3.083206479593302) internal successors, (107348), 34817 states have internal predecessors, (107348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:28,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34818 states to 34818 states and 107348 transitions. [2021-05-03 14:06:28,880 INFO L78 Accepts]: Start accepts. Automaton has 34818 states and 107348 transitions. Word has length 22 [2021-05-03 14:06:28,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:28,880 INFO L480 AbstractCegarLoop]: Abstraction has 34818 states and 107348 transitions. [2021-05-03 14:06:28,880 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) [2021-05-03 14:06:28,880 INFO L276 IsEmpty]: Start isEmpty. Operand 34818 states and 107348 transitions. [2021-05-03 14:06:28,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:06:28,890 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:28,890 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:29,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10502 [2021-05-03 14:06:29,104 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:29,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:29,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1826661773, now seen corresponding path program 206 times [2021-05-03 14:06:29,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:29,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725202463] [2021-05-03 14:06:29,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:29,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:29,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725202463] [2021-05-03 14:06:29,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178007997] [2021-05-03 14:06:29,183 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 [2021-05-03 14:06:29,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:06:29,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:29,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:06:29,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:29,254 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:29,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:29,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:06:29,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109845642] [2021-05-03 14:06:29,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:29,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:29,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:29,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:29,255 INFO L87 Difference]: Start difference. First operand 34818 states and 107348 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) [2021-05-03 14:06:29,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:29,654 INFO L93 Difference]: Finished difference Result 36428 states and 111724 transitions. [2021-05-03 14:06:29,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 14:06:29,655 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 [2021-05-03 14:06:29,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:29,714 INFO L225 Difference]: With dead ends: 36428 [2021-05-03 14:06:29,714 INFO L226 Difference]: Without dead ends: 36428 [2021-05-03 14:06:29,714 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 276.0ms TimeCoverageRelationStatistics Valid=524, Invalid=1036, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 14:06:29,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36428 states. [2021-05-03 14:06:30,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36428 to 34194. [2021-05-03 14:06:30,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34194 states, 34193 states have (on average 3.0853683502471267) internal successors, (105498), 34193 states have internal predecessors, (105498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:30,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34194 states to 34194 states and 105498 transitions. [2021-05-03 14:06:30,485 INFO L78 Accepts]: Start accepts. Automaton has 34194 states and 105498 transitions. Word has length 22 [2021-05-03 14:06:30,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:30,486 INFO L480 AbstractCegarLoop]: Abstraction has 34194 states and 105498 transitions. [2021-05-03 14:06:30,486 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) [2021-05-03 14:06:30,486 INFO L276 IsEmpty]: Start isEmpty. Operand 34194 states and 105498 transitions. [2021-05-03 14:06:30,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:06:30,495 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:30,495 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:30,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10503,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:30,709 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:30,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:30,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1663098905, now seen corresponding path program 207 times [2021-05-03 14:06:30,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:30,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167241681] [2021-05-03 14:06:30,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:30,757 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:30,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167241681] [2021-05-03 14:06:30,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336471555] [2021-05-03 14:06:30,757 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 [2021-05-03 14:06:30,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:06:30,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:30,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:06:30,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:30,822 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:06:30,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:30,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:06:30,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736609084] [2021-05-03 14:06:30,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:06:30,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:30,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:06:30,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:06:30,823 INFO L87 Difference]: Start difference. First operand 34194 states and 105498 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) [2021-05-03 14:06:31,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:31,111 INFO L93 Difference]: Finished difference Result 34348 states and 105669 transitions. [2021-05-03 14:06:31,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:06:31,112 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 22 [2021-05-03 14:06:31,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:31,172 INFO L225 Difference]: With dead ends: 34348 [2021-05-03 14:06:31,173 INFO L226 Difference]: Without dead ends: 34344 [2021-05-03 14:06:31,173 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 126.1ms TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:06:31,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34344 states. [2021-05-03 14:06:31,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34344 to 34194. [2021-05-03 14:06:31,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34194 states, 34193 states have (on average 3.0853098587430177) internal successors, (105496), 34193 states have internal predecessors, (105496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:32,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34194 states to 34194 states and 105496 transitions. [2021-05-03 14:06:32,050 INFO L78 Accepts]: Start accepts. Automaton has 34194 states and 105496 transitions. Word has length 22 [2021-05-03 14:06:32,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:32,050 INFO L480 AbstractCegarLoop]: Abstraction has 34194 states and 105496 transitions. [2021-05-03 14:06:32,050 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) [2021-05-03 14:06:32,050 INFO L276 IsEmpty]: Start isEmpty. Operand 34194 states and 105496 transitions. [2021-05-03 14:06:32,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:06:32,058 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:32,058 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:32,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10504 [2021-05-03 14:06:32,275 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:32,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:32,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1971295143, now seen corresponding path program 208 times [2021-05-03 14:06:32,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:32,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311682692] [2021-05-03 14:06:32,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:32,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:32,348 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:32,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311682692] [2021-05-03 14:06:32,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458466588] [2021-05-03 14:06:32,348 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 [2021-05-03 14:06:32,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:06:32,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:32,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:06:32,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:32,425 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:32,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:32,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:06:32,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196511506] [2021-05-03 14:06:32,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:06:32,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:32,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:06:32,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:06:32,426 INFO L87 Difference]: Start difference. First operand 34194 states and 105496 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) [2021-05-03 14:06:32,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:32,772 INFO L93 Difference]: Finished difference Result 37342 states and 114450 transitions. [2021-05-03 14:06:32,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:06:32,773 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 [2021-05-03 14:06:32,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:32,836 INFO L225 Difference]: With dead ends: 37342 [2021-05-03 14:06:32,836 INFO L226 Difference]: Without dead ends: 37342 [2021-05-03 14:06:32,836 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 228.6ms TimeCoverageRelationStatistics Valid=415, Invalid=775, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:06:32,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37342 states. [2021-05-03 14:06:33,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37342 to 32084. [2021-05-03 14:06:33,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32084 states, 32083 states have (on average 3.0869307733067357) internal successors, (99038), 32083 states have internal predecessors, (99038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:33,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32084 states to 32084 states and 99038 transitions. [2021-05-03 14:06:33,774 INFO L78 Accepts]: Start accepts. Automaton has 32084 states and 99038 transitions. Word has length 22 [2021-05-03 14:06:33,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:33,774 INFO L480 AbstractCegarLoop]: Abstraction has 32084 states and 99038 transitions. [2021-05-03 14:06:33,775 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) [2021-05-03 14:06:33,775 INFO L276 IsEmpty]: Start isEmpty. Operand 32084 states and 99038 transitions. [2021-05-03 14:06:33,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:06:33,782 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:33,782 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:33,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10505 [2021-05-03 14:06:33,983 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:33,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:33,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1334828289, now seen corresponding path program 209 times [2021-05-03 14:06:33,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:33,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699233732] [2021-05-03 14:06:33,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:33,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:34,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699233732] [2021-05-03 14:06:34,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862289286] [2021-05-03 14:06:34,061 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 [2021-05-03 14:06:34,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:06:34,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:34,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:06:34,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:34,137 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:34,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:34,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:06:34,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628758192] [2021-05-03 14:06:34,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:06:34,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:34,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:06:34,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:06:34,138 INFO L87 Difference]: Start difference. First operand 32084 states and 99038 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) [2021-05-03 14:06:34,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:34,520 INFO L93 Difference]: Finished difference Result 32697 states and 100396 transitions. [2021-05-03 14:06:34,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:06:34,520 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 [2021-05-03 14:06:34,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:34,574 INFO L225 Difference]: With dead ends: 32697 [2021-05-03 14:06:34,574 INFO L226 Difference]: Without dead ends: 32697 [2021-05-03 14:06:34,574 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 219.2ms TimeCoverageRelationStatistics Valid=343, Invalid=649, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:06:34,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32697 states. [2021-05-03 14:06:35,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32697 to 31320. [2021-05-03 14:06:35,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31320 states, 31319 states have (on average 3.0872313930840702) internal successors, (96689), 31319 states have internal predecessors, (96689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:35,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31320 states to 31320 states and 96689 transitions. [2021-05-03 14:06:35,113 INFO L78 Accepts]: Start accepts. Automaton has 31320 states and 96689 transitions. Word has length 22 [2021-05-03 14:06:35,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:35,113 INFO L480 AbstractCegarLoop]: Abstraction has 31320 states and 96689 transitions. [2021-05-03 14:06:35,113 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) [2021-05-03 14:06:35,113 INFO L276 IsEmpty]: Start isEmpty. Operand 31320 states and 96689 transitions. [2021-05-03 14:06:35,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:06:35,121 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:35,122 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:35,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10506,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:35,336 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:35,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:35,337 INFO L82 PathProgramCache]: Analyzing trace with hash 67371111, now seen corresponding path program 210 times [2021-05-03 14:06:35,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:35,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482039204] [2021-05-03 14:06:35,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:35,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:35,416 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:35,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482039204] [2021-05-03 14:06:35,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922031623] [2021-05-03 14:06:35,416 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 [2021-05-03 14:06:35,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:06:35,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:35,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:06:35,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:35,492 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:35,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:35,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:06:35,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454247950] [2021-05-03 14:06:35,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:06:35,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:35,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:06:35,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:06:35,493 INFO L87 Difference]: Start difference. First operand 31320 states and 96689 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) [2021-05-03 14:06:35,849 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-05-03 14:06:36,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:36,192 INFO L93 Difference]: Finished difference Result 33049 states and 101433 transitions. [2021-05-03 14:06:36,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 14:06:36,193 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 [2021-05-03 14:06:36,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:36,245 INFO L225 Difference]: With dead ends: 33049 [2021-05-03 14:06:36,245 INFO L226 Difference]: Without dead ends: 33049 [2021-05-03 14:06:36,245 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 595.9ms TimeCoverageRelationStatistics Valid=561, Invalid=1079, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 14:06:36,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33049 states. [2021-05-03 14:06:36,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33049 to 30873. [2021-05-03 14:06:36,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30873 states, 30872 states have (on average 3.089045089401399) internal successors, (95365), 30872 states have internal predecessors, (95365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:36,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30873 states to 30873 states and 95365 transitions. [2021-05-03 14:06:36,757 INFO L78 Accepts]: Start accepts. Automaton has 30873 states and 95365 transitions. Word has length 22 [2021-05-03 14:06:36,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:36,758 INFO L480 AbstractCegarLoop]: Abstraction has 30873 states and 95365 transitions. [2021-05-03 14:06:36,758 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) [2021-05-03 14:06:36,758 INFO L276 IsEmpty]: Start isEmpty. Operand 30873 states and 95365 transitions. [2021-05-03 14:06:36,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:06:36,765 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:36,766 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:36,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10507,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:36,980 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:36,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:36,980 INFO L82 PathProgramCache]: Analyzing trace with hash -658261175, now seen corresponding path program 211 times [2021-05-03 14:06:36,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:36,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280475889] [2021-05-03 14:06:36,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:36,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:37,034 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:37,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280475889] [2021-05-03 14:06:37,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089981079] [2021-05-03 14:06:37,034 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) [2021-05-03 14:06:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:37,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:06:37,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:37,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:37,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:06:37,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123054876] [2021-05-03 14:06:37,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:06:37,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:37,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:06:37,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:06:37,094 INFO L87 Difference]: Start difference. First operand 30873 states and 95365 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) [2021-05-03 14:06:37,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:37,504 INFO L93 Difference]: Finished difference Result 31092 states and 95691 transitions. [2021-05-03 14:06:37,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:06:37,505 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 [2021-05-03 14:06:37,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:37,557 INFO L225 Difference]: With dead ends: 31092 [2021-05-03 14:06:37,557 INFO L226 Difference]: Without dead ends: 31088 [2021-05-03 14:06:37,557 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:06:37,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31088 states. [2021-05-03 14:06:37,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31088 to 30908. [2021-05-03 14:06:37,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30908 states, 30907 states have (on average 3.088588345682208) internal successors, (95459), 30907 states have internal predecessors, (95459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:38,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30908 states to 30908 states and 95459 transitions. [2021-05-03 14:06:38,010 INFO L78 Accepts]: Start accepts. Automaton has 30908 states and 95459 transitions. Word has length 22 [2021-05-03 14:06:38,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:38,010 INFO L480 AbstractCegarLoop]: Abstraction has 30908 states and 95459 transitions. [2021-05-03 14:06:38,010 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) [2021-05-03 14:06:38,010 INFO L276 IsEmpty]: Start isEmpty. Operand 30908 states and 95459 transitions. [2021-05-03 14:06:38,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:06:38,018 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:38,018 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:38,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10508,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:38,233 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:38,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:38,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1059487885, now seen corresponding path program 212 times [2021-05-03 14:06:38,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:38,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344892142] [2021-05-03 14:06:38,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:38,285 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:38,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344892142] [2021-05-03 14:06:38,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126027921] [2021-05-03 14:06:38,285 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 [2021-05-03 14:06:38,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:06:38,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:38,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:06:38,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:38,353 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:38,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:38,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:06:38,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617360938] [2021-05-03 14:06:38,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:06:38,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:38,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:06:38,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:06:38,353 INFO L87 Difference]: Start difference. First operand 30908 states and 95459 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) [2021-05-03 14:06:38,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:38,544 INFO L93 Difference]: Finished difference Result 31582 states and 97082 transitions. [2021-05-03 14:06:38,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:06:38,545 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 [2021-05-03 14:06:38,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:38,596 INFO L225 Difference]: With dead ends: 31582 [2021-05-03 14:06:38,596 INFO L226 Difference]: Without dead ends: 31582 [2021-05-03 14:06:38,597 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:06:38,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31582 states. [2021-05-03 14:06:39,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31582 to 30923. [2021-05-03 14:06:39,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30923 states, 30922 states have (on average 3.0885130327921866) internal successors, (95503), 30922 states have internal predecessors, (95503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:39,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30923 states to 30923 states and 95503 transitions. [2021-05-03 14:06:39,231 INFO L78 Accepts]: Start accepts. Automaton has 30923 states and 95503 transitions. Word has length 22 [2021-05-03 14:06:39,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:39,231 INFO L480 AbstractCegarLoop]: Abstraction has 30923 states and 95503 transitions. [2021-05-03 14:06:39,231 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) [2021-05-03 14:06:39,231 INFO L276 IsEmpty]: Start isEmpty. Operand 30923 states and 95503 transitions. [2021-05-03 14:06:39,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:06:39,239 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:39,239 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:39,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10509,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:39,453 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:39,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:39,453 INFO L82 PathProgramCache]: Analyzing trace with hash -669559449, now seen corresponding path program 213 times [2021-05-03 14:06:39,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:39,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993121073] [2021-05-03 14:06:39,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:39,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:39,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993121073] [2021-05-03 14:06:39,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959607528] [2021-05-03 14:06:39,508 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 [2021-05-03 14:06:39,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:06:39,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:39,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:06:39,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:39,576 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:39,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:39,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:06:39,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791411462] [2021-05-03 14:06:39,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:06:39,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:39,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:06:39,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:39,576 INFO L87 Difference]: Start difference. First operand 30923 states and 95503 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) [2021-05-03 14:06:39,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:39,792 INFO L93 Difference]: Finished difference Result 31896 states and 97991 transitions. [2021-05-03 14:06:39,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:06:39,792 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 [2021-05-03 14:06:39,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:39,847 INFO L225 Difference]: With dead ends: 31896 [2021-05-03 14:06:39,847 INFO L226 Difference]: Without dead ends: 31896 [2021-05-03 14:06:39,847 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=193, Invalid=313, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:06:39,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31896 states. [2021-05-03 14:06:40,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31896 to 30949. [2021-05-03 14:06:40,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30949 states, 30948 states have (on average 3.0883094222566885) internal successors, (95577), 30948 states have internal predecessors, (95577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:40,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30949 states to 30949 states and 95577 transitions. [2021-05-03 14:06:40,485 INFO L78 Accepts]: Start accepts. Automaton has 30949 states and 95577 transitions. Word has length 22 [2021-05-03 14:06:40,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:40,485 INFO L480 AbstractCegarLoop]: Abstraction has 30949 states and 95577 transitions. [2021-05-03 14:06:40,485 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) [2021-05-03 14:06:40,485 INFO L276 IsEmpty]: Start isEmpty. Operand 30949 states and 95577 transitions. [2021-05-03 14:06:40,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:06:40,493 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:40,493 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:40,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10510,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:40,708 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:40,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:40,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1564548045, now seen corresponding path program 214 times [2021-05-03 14:06:40,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:40,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768904118] [2021-05-03 14:06:40,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:40,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:40,772 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:40,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768904118] [2021-05-03 14:06:40,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857901052] [2021-05-03 14:06:40,773 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 [2021-05-03 14:06:40,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:06:40,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:40,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:06:40,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:40,845 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:40,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:40,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:06:40,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347815748] [2021-05-03 14:06:40,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:40,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:40,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:40,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:40,846 INFO L87 Difference]: Start difference. First operand 30949 states and 95577 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) [2021-05-03 14:06:41,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:41,075 INFO L93 Difference]: Finished difference Result 31958 states and 98178 transitions. [2021-05-03 14:06:41,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:06:41,076 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 [2021-05-03 14:06:41,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:41,125 INFO L225 Difference]: With dead ends: 31958 [2021-05-03 14:06:41,125 INFO L226 Difference]: Without dead ends: 31958 [2021-05-03 14:06:41,125 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 126.8ms TimeCoverageRelationStatistics Valid=222, Invalid=378, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:06:41,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31958 states. [2021-05-03 14:06:41,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31958 to 30995. [2021-05-03 14:06:41,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30995 states, 30994 states have (on average 3.0880170355552687) internal successors, (95710), 30994 states have internal predecessors, (95710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:41,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30995 states to 30995 states and 95710 transitions. [2021-05-03 14:06:41,816 INFO L78 Accepts]: Start accepts. Automaton has 30995 states and 95710 transitions. Word has length 22 [2021-05-03 14:06:41,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:41,816 INFO L480 AbstractCegarLoop]: Abstraction has 30995 states and 95710 transitions. [2021-05-03 14:06:41,816 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) [2021-05-03 14:06:41,816 INFO L276 IsEmpty]: Start isEmpty. Operand 30995 states and 95710 transitions. [2021-05-03 14:06:41,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:06:41,823 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:41,823 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:42,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10511 [2021-05-03 14:06:42,037 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:42,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:42,038 INFO L82 PathProgramCache]: Analyzing trace with hash 2102403623, now seen corresponding path program 215 times [2021-05-03 14:06:42,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:42,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700866258] [2021-05-03 14:06:42,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:42,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:42,101 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:42,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700866258] [2021-05-03 14:06:42,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732135052] [2021-05-03 14:06:42,101 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 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 [2021-05-03 14:06:42,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:06:42,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:42,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:06:42,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:42,168 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:42,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:42,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:06:42,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884075135] [2021-05-03 14:06:42,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:42,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:42,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:42,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:42,181 INFO L87 Difference]: Start difference. First operand 30995 states and 95710 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) [2021-05-03 14:06:42,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:42,562 INFO L93 Difference]: Finished difference Result 36047 states and 110795 transitions. [2021-05-03 14:06:42,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:06:42,572 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 [2021-05-03 14:06:42,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:42,633 INFO L225 Difference]: With dead ends: 36047 [2021-05-03 14:06:42,633 INFO L226 Difference]: Without dead ends: 36047 [2021-05-03 14:06:42,633 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 235.2ms TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:06:42,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36047 states. [2021-05-03 14:06:43,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36047 to 35338. [2021-05-03 14:06:43,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35338 states, 35337 states have (on average 3.0890001980926507) internal successors, (109156), 35337 states have internal predecessors, (109156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:43,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35338 states to 35338 states and 109156 transitions. [2021-05-03 14:06:43,209 INFO L78 Accepts]: Start accepts. Automaton has 35338 states and 109156 transitions. Word has length 22 [2021-05-03 14:06:43,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:43,210 INFO L480 AbstractCegarLoop]: Abstraction has 35338 states and 109156 transitions. [2021-05-03 14:06:43,210 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) [2021-05-03 14:06:43,210 INFO L276 IsEmpty]: Start isEmpty. Operand 35338 states and 109156 transitions. [2021-05-03 14:06:43,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:06:43,218 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:43,218 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:43,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10512 [2021-05-03 14:06:43,432 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:43,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:43,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1596057357, now seen corresponding path program 216 times [2021-05-03 14:06:43,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:43,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443348893] [2021-05-03 14:06:43,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:43,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:43,714 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:43,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443348893] [2021-05-03 14:06:43,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279840612] [2021-05-03 14:06:43,714 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 [2021-05-03 14:06:43,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:06:43,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:43,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:06:43,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:43,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:43,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:06:43,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670163212] [2021-05-03 14:06:43,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:43,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:43,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:43,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:43,790 INFO L87 Difference]: Start difference. First operand 35338 states and 109156 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) [2021-05-03 14:06:43,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:43,999 INFO L93 Difference]: Finished difference Result 39264 states and 120741 transitions. [2021-05-03 14:06:43,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:06:43,999 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 [2021-05-03 14:06:43,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:44,063 INFO L225 Difference]: With dead ends: 39264 [2021-05-03 14:06:44,064 INFO L226 Difference]: Without dead ends: 39264 [2021-05-03 14:06:44,064 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 319.8ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:06:44,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39264 states. [2021-05-03 14:06:44,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39264 to 38914. [2021-05-03 14:06:44,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38914 states, 38913 states have (on average 3.083982216739907) internal successors, (120007), 38913 states have internal predecessors, (120007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:44,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38914 states to 38914 states and 120007 transitions. [2021-05-03 14:06:44,684 INFO L78 Accepts]: Start accepts. Automaton has 38914 states and 120007 transitions. Word has length 22 [2021-05-03 14:06:44,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:44,684 INFO L480 AbstractCegarLoop]: Abstraction has 38914 states and 120007 transitions. [2021-05-03 14:06:44,684 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) [2021-05-03 14:06:44,684 INFO L276 IsEmpty]: Start isEmpty. Operand 38914 states and 120007 transitions. [2021-05-03 14:06:44,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:06:44,694 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:44,694 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:44,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10513,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:44,905 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:44,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:44,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1215775001, now seen corresponding path program 217 times [2021-05-03 14:06:44,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:44,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684975664] [2021-05-03 14:06:44,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:45,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684975664] [2021-05-03 14:06:45,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364957822] [2021-05-03 14:06:45,236 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 [2021-05-03 14:06:45,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:45,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:06:45,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:45,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:45,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:06:45,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287798213] [2021-05-03 14:06:45,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:06:45,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:45,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:06:45,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:06:45,304 INFO L87 Difference]: Start difference. First operand 38914 states and 120007 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) [2021-05-03 14:06:45,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:45,611 INFO L93 Difference]: Finished difference Result 39365 states and 121002 transitions. [2021-05-03 14:06:45,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:06:45,612 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 [2021-05-03 14:06:45,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:45,672 INFO L225 Difference]: With dead ends: 39365 [2021-05-03 14:06:45,672 INFO L226 Difference]: Without dead ends: 39365 [2021-05-03 14:06:45,673 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 463.7ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:06:45,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39365 states. [2021-05-03 14:06:46,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39365 to 38918. [2021-05-03 14:06:46,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38918 states, 38917 states have (on average 3.0839735848086955) internal successors, (120019), 38917 states have internal predecessors, (120019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:46,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38918 states to 38918 states and 120019 transitions. [2021-05-03 14:06:46,288 INFO L78 Accepts]: Start accepts. Automaton has 38918 states and 120019 transitions. Word has length 22 [2021-05-03 14:06:46,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:46,288 INFO L480 AbstractCegarLoop]: Abstraction has 38918 states and 120019 transitions. [2021-05-03 14:06:46,288 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) [2021-05-03 14:06:46,288 INFO L276 IsEmpty]: Start isEmpty. Operand 38918 states and 120019 transitions. [2021-05-03 14:06:46,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:06:46,298 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:46,298 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:46,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10514 [2021-05-03 14:06:46,512 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:46,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:46,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1811735117, now seen corresponding path program 218 times [2021-05-03 14:06:46,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:46,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871587197] [2021-05-03 14:06:46,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:46,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:46,788 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:46,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871587197] [2021-05-03 14:06:46,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239421976] [2021-05-03 14:06:46,788 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 [2021-05-03 14:06:46,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:06:46,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:46,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:06:46,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:46,864 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:46,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:46,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:06:46,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410023673] [2021-05-03 14:06:46,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:06:46,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:46,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:06:46,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:06:46,865 INFO L87 Difference]: Start difference. First operand 38918 states and 120019 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) [2021-05-03 14:06:47,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:47,411 INFO L93 Difference]: Finished difference Result 40630 states and 124791 transitions. [2021-05-03 14:06:47,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:06:47,412 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 [2021-05-03 14:06:47,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:47,480 INFO L225 Difference]: With dead ends: 40630 [2021-05-03 14:06:47,480 INFO L226 Difference]: Without dead ends: 40630 [2021-05-03 14:06:47,480 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 529.3ms TimeCoverageRelationStatistics Valid=386, Invalid=804, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:06:47,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40630 states. [2021-05-03 14:06:48,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40630 to 40219. [2021-05-03 14:06:48,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40219 states, 40218 states have (on average 3.082301457059028) internal successors, (123964), 40218 states have internal predecessors, (123964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:48,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40219 states to 40219 states and 123964 transitions. [2021-05-03 14:06:48,373 INFO L78 Accepts]: Start accepts. Automaton has 40219 states and 123964 transitions. Word has length 22 [2021-05-03 14:06:48,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:48,373 INFO L480 AbstractCegarLoop]: Abstraction has 40219 states and 123964 transitions. [2021-05-03 14:06:48,373 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) [2021-05-03 14:06:48,373 INFO L276 IsEmpty]: Start isEmpty. Operand 40219 states and 123964 transitions. [2021-05-03 14:06:48,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:06:48,384 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:48,384 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:48,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10515,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:48,585 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:48,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:48,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1175268263, now seen corresponding path program 219 times [2021-05-03 14:06:48,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:48,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084456649] [2021-05-03 14:06:48,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:48,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:48,681 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:48,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084456649] [2021-05-03 14:06:48,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022265654] [2021-05-03 14:06:48,681 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 [2021-05-03 14:06:48,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:06:48,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:48,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:06:48,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:48,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:48,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:06:48,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303388743] [2021-05-03 14:06:48,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:06:48,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:48,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:06:48,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:06:48,758 INFO L87 Difference]: Start difference. First operand 40219 states and 123964 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) [2021-05-03 14:06:49,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:49,267 INFO L93 Difference]: Finished difference Result 42248 states and 129555 transitions. [2021-05-03 14:06:49,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 14:06:49,268 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 [2021-05-03 14:06:49,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:49,337 INFO L225 Difference]: With dead ends: 42248 [2021-05-03 14:06:49,338 INFO L226 Difference]: Without dead ends: 42248 [2021-05-03 14:06:49,338 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 365.5ms TimeCoverageRelationStatistics Valid=665, Invalid=1315, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 14:06:49,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42248 states. [2021-05-03 14:06:50,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42248 to 41433. [2021-05-03 14:06:50,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41433 states, 41432 states have (on average 3.080614018150222) internal successors, (127636), 41432 states have internal predecessors, (127636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:50,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41433 states to 41433 states and 127636 transitions. [2021-05-03 14:06:50,312 INFO L78 Accepts]: Start accepts. Automaton has 41433 states and 127636 transitions. Word has length 22 [2021-05-03 14:06:50,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:50,312 INFO L480 AbstractCegarLoop]: Abstraction has 41433 states and 127636 transitions. [2021-05-03 14:06:50,312 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) [2021-05-03 14:06:50,313 INFO L276 IsEmpty]: Start isEmpty. Operand 41433 states and 127636 transitions. [2021-05-03 14:06:50,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:06:50,324 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:50,324 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:50,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10516,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:50,539 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:50,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:50,540 INFO L82 PathProgramCache]: Analyzing trace with hash -141305647, now seen corresponding path program 220 times [2021-05-03 14:06:50,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:50,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149371146] [2021-05-03 14:06:50,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:50,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:50,604 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:50,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149371146] [2021-05-03 14:06:50,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058856931] [2021-05-03 14:06:50,604 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 [2021-05-03 14:06:50,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:06:50,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:50,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:06:50,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:50,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:50,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:06:50,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786587429] [2021-05-03 14:06:50,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:06:50,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:50,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:06:50,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:50,669 INFO L87 Difference]: Start difference. First operand 41433 states and 127636 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) [2021-05-03 14:06:51,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:51,029 INFO L93 Difference]: Finished difference Result 41740 states and 128184 transitions. [2021-05-03 14:06:51,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:06:51,030 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 [2021-05-03 14:06:51,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:51,098 INFO L225 Difference]: With dead ends: 41740 [2021-05-03 14:06:51,098 INFO L226 Difference]: Without dead ends: 41734 [2021-05-03 14:06:51,098 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 188.5ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:06:51,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41734 states. [2021-05-03 14:06:51,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41734 to 40967. [2021-05-03 14:06:51,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40967 states, 40966 states have (on average 3.0791632085143776) internal successors, (126141), 40966 states have internal predecessors, (126141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:51,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40967 states to 40967 states and 126141 transitions. [2021-05-03 14:06:51,933 INFO L78 Accepts]: Start accepts. Automaton has 40967 states and 126141 transitions. Word has length 22 [2021-05-03 14:06:51,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:51,933 INFO L480 AbstractCegarLoop]: Abstraction has 40967 states and 126141 transitions. [2021-05-03 14:06:51,933 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) [2021-05-03 14:06:51,933 INFO L276 IsEmpty]: Start isEmpty. Operand 40967 states and 126141 transitions. [2021-05-03 14:06:51,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:06:51,944 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:51,944 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:52,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10517 [2021-05-03 14:06:52,158 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:52,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:52,158 INFO L82 PathProgramCache]: Analyzing trace with hash 429354799, now seen corresponding path program 221 times [2021-05-03 14:06:52,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:52,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851577358] [2021-05-03 14:06:52,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:52,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:52,220 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:52,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851577358] [2021-05-03 14:06:52,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140483721] [2021-05-03 14:06:52,220 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) [2021-05-03 14:06:52,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:06:52,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:52,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:06:52,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:52,288 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:52,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:52,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:06:52,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928776296] [2021-05-03 14:06:52,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:06:52,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:52,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:06:52,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:52,289 INFO L87 Difference]: Start difference. First operand 40967 states and 126141 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) [2021-05-03 14:06:52,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:52,491 INFO L93 Difference]: Finished difference Result 46670 states and 143099 transitions. [2021-05-03 14:06:52,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:06:52,492 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 [2021-05-03 14:06:52,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:52,569 INFO L225 Difference]: With dead ends: 46670 [2021-05-03 14:06:52,569 INFO L226 Difference]: Without dead ends: 46670 [2021-05-03 14:06:52,569 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:06:52,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46670 states. [2021-05-03 14:06:53,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46670 to 45904. [2021-05-03 14:06:53,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45904 states, 45903 states have (on average 3.0725224930832407) internal successors, (141038), 45903 states have internal predecessors, (141038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:53,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45904 states to 45904 states and 141038 transitions. [2021-05-03 14:06:53,631 INFO L78 Accepts]: Start accepts. Automaton has 45904 states and 141038 transitions. Word has length 22 [2021-05-03 14:06:53,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:53,631 INFO L480 AbstractCegarLoop]: Abstraction has 45904 states and 141038 transitions. [2021-05-03 14:06:53,631 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) [2021-05-03 14:06:53,631 INFO L276 IsEmpty]: Start isEmpty. Operand 45904 states and 141038 transitions. [2021-05-03 14:06:53,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:06:53,644 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:53,644 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:53,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10518,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:53,859 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:53,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:53,859 INFO L82 PathProgramCache]: Analyzing trace with hash -76991467, now seen corresponding path program 222 times [2021-05-03 14:06:53,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:53,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993074468] [2021-05-03 14:06:53,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:53,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993074468] [2021-05-03 14:06:53,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112461816] [2021-05-03 14:06:53,930 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 [2021-05-03 14:06:53,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:06:53,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:53,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:06:53,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:53,993 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:53,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:53,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:06:53,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10646237] [2021-05-03 14:06:53,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:53,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:53,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:53,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:53,994 INFO L87 Difference]: Start difference. First operand 45904 states and 141038 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) [2021-05-03 14:06:54,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:54,286 INFO L93 Difference]: Finished difference Result 49343 states and 151040 transitions. [2021-05-03 14:06:54,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:06:54,287 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 [2021-05-03 14:06:54,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:54,376 INFO L225 Difference]: With dead ends: 49343 [2021-05-03 14:06:54,377 INFO L226 Difference]: Without dead ends: 49343 [2021-05-03 14:06:54,377 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 133.9ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:06:54,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49343 states. [2021-05-03 14:06:55,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49343 to 46131. [2021-05-03 14:06:55,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46131 states, 46130 states have (on average 3.0718621287665293) internal successors, (141705), 46130 states have internal predecessors, (141705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:55,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46131 states to 46131 states and 141705 transitions. [2021-05-03 14:06:55,735 INFO L78 Accepts]: Start accepts. Automaton has 46131 states and 141705 transitions. Word has length 22 [2021-05-03 14:06:55,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:55,735 INFO L480 AbstractCegarLoop]: Abstraction has 46131 states and 141705 transitions. [2021-05-03 14:06:55,735 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) [2021-05-03 14:06:55,735 INFO L276 IsEmpty]: Start isEmpty. Operand 46131 states and 141705 transitions. [2021-05-03 14:06:55,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:06:55,749 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:55,749 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:55,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10519,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:55,964 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:55,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:55,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1406143471, now seen corresponding path program 223 times [2021-05-03 14:06:55,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:55,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243314840] [2021-05-03 14:06:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:55,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:56,036 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:56,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243314840] [2021-05-03 14:06:56,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900486395] [2021-05-03 14:06:56,037 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 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 [2021-05-03 14:06:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:56,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:06:56,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:56,109 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:56,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:56,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:06:56,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374883305] [2021-05-03 14:06:56,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:56,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:56,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:56,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:56,110 INFO L87 Difference]: Start difference. First operand 46131 states and 141705 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) [2021-05-03 14:06:56,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:56,495 INFO L93 Difference]: Finished difference Result 55150 states and 168573 transitions. [2021-05-03 14:06:56,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:06:56,496 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 [2021-05-03 14:06:56,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:56,619 INFO L225 Difference]: With dead ends: 55150 [2021-05-03 14:06:56,619 INFO L226 Difference]: Without dead ends: 55150 [2021-05-03 14:06:56,620 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 180.1ms TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:06:56,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55150 states. [2021-05-03 14:06:57,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55150 to 52518. [2021-05-03 14:06:57,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52518 states, 52517 states have (on average 3.067406744482739) internal successors, (161091), 52517 states have internal predecessors, (161091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:57,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52518 states to 52518 states and 161091 transitions. [2021-05-03 14:06:57,957 INFO L78 Accepts]: Start accepts. Automaton has 52518 states and 161091 transitions. Word has length 22 [2021-05-03 14:06:57,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:57,957 INFO L480 AbstractCegarLoop]: Abstraction has 52518 states and 161091 transitions. [2021-05-03 14:06:57,957 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) [2021-05-03 14:06:57,957 INFO L276 IsEmpty]: Start isEmpty. Operand 52518 states and 161091 transitions. [2021-05-03 14:06:57,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:06:57,972 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:57,972 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:58,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10520 [2021-05-03 14:06:58,186 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:58,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:58,186 INFO L82 PathProgramCache]: Analyzing trace with hash 138686293, now seen corresponding path program 224 times [2021-05-03 14:06:58,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:58,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123740345] [2021-05-03 14:06:58,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:58,262 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:58,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123740345] [2021-05-03 14:06:58,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574825512] [2021-05-03 14:06:58,263 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 [2021-05-03 14:06:58,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:06:58,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:58,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:06:58,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:58,324 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:58,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:58,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:06:58,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200501796] [2021-05-03 14:06:58,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:58,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:58,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:58,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:58,325 INFO L87 Difference]: Start difference. First operand 52518 states and 161091 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) [2021-05-03 14:06:59,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:59,126 INFO L93 Difference]: Finished difference Result 68037 states and 207399 transitions. [2021-05-03 14:06:59,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 14:06:59,127 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 [2021-05-03 14:06:59,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:59,277 INFO L225 Difference]: With dead ends: 68037 [2021-05-03 14:06:59,277 INFO L226 Difference]: Without dead ends: 68037 [2021-05-03 14:06:59,278 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 285.5ms TimeCoverageRelationStatistics Valid=523, Invalid=1037, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 14:06:59,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68037 states. [2021-05-03 14:07:00,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68037 to 63418. [2021-05-03 14:07:00,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63418 states, 63417 states have (on average 3.060788116751029) internal successors, (194106), 63417 states have internal predecessors, (194106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:00,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63418 states to 63418 states and 194106 transitions. [2021-05-03 14:07:00,529 INFO L78 Accepts]: Start accepts. Automaton has 63418 states and 194106 transitions. Word has length 22 [2021-05-03 14:07:00,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:00,529 INFO L480 AbstractCegarLoop]: Abstraction has 63418 states and 194106 transitions. [2021-05-03 14:07:00,529 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) [2021-05-03 14:07:00,529 INFO L276 IsEmpty]: Start isEmpty. Operand 63418 states and 194106 transitions. [2021-05-03 14:07:00,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:00,545 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:00,545 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:00,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10521 [2021-05-03 14:07:00,761 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:00,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:00,761 INFO L82 PathProgramCache]: Analyzing trace with hash -353147191, now seen corresponding path program 225 times [2021-05-03 14:07:00,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:00,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148771741] [2021-05-03 14:07:00,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:00,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:00,834 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:00,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148771741] [2021-05-03 14:07:00,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901707359] [2021-05-03 14:07:00,835 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 [2021-05-03 14:07:00,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:07:00,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:00,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:00,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:00,903 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:00,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:00,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:07:00,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084630923] [2021-05-03 14:07:00,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:07:00,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:00,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:07:00,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:07:00,904 INFO L87 Difference]: Start difference. First operand 63418 states and 194106 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) [2021-05-03 14:07:01,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:01,320 INFO L93 Difference]: Finished difference Result 75602 states and 230264 transitions. [2021-05-03 14:07:01,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:07:01,321 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 [2021-05-03 14:07:01,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:01,455 INFO L225 Difference]: With dead ends: 75602 [2021-05-03 14:07:01,455 INFO L226 Difference]: Without dead ends: 75602 [2021-05-03 14:07:01,455 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 191.2ms TimeCoverageRelationStatistics Valid=342, Invalid=650, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:07:01,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75602 states. [2021-05-03 14:07:02,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75602 to 53421. [2021-05-03 14:07:02,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53421 states, 53420 states have (on average 3.0645638337701238) internal successors, (163709), 53420 states have internal predecessors, (163709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:02,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53421 states to 53421 states and 163709 transitions. [2021-05-03 14:07:02,796 INFO L78 Accepts]: Start accepts. Automaton has 53421 states and 163709 transitions. Word has length 22 [2021-05-03 14:07:02,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:02,797 INFO L480 AbstractCegarLoop]: Abstraction has 53421 states and 163709 transitions. [2021-05-03 14:07:02,797 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) [2021-05-03 14:07:02,797 INFO L276 IsEmpty]: Start isEmpty. Operand 53421 states and 163709 transitions. [2021-05-03 14:07:02,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:02,812 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:02,812 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:03,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10522,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:03,012 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:03,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:03,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1620604369, now seen corresponding path program 226 times [2021-05-03 14:07:03,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:03,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002508208] [2021-05-03 14:07:03,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:03,092 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:03,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002508208] [2021-05-03 14:07:03,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704569281] [2021-05-03 14:07:03,092 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 [2021-05-03 14:07:03,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:07:03,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:03,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:03,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:03,396 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:03,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:03,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:07:03,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382161666] [2021-05-03 14:07:03,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:07:03,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:03,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:07:03,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:07:03,397 INFO L87 Difference]: Start difference. First operand 53421 states and 163709 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) [2021-05-03 14:07:03,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:03,950 INFO L93 Difference]: Finished difference Result 68985 states and 210204 transitions. [2021-05-03 14:07:03,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 14:07:03,950 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 [2021-05-03 14:07:03,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:04,081 INFO L225 Difference]: With dead ends: 68985 [2021-05-03 14:07:04,081 INFO L226 Difference]: Without dead ends: 68985 [2021-05-03 14:07:04,081 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 560.1ms TimeCoverageRelationStatistics Valid=560, Invalid=1080, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 14:07:04,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68985 states. [2021-05-03 14:07:04,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68985 to 46695. [2021-05-03 14:07:05,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46695 states, 46694 states have (on average 3.0735426393112606) internal successors, (143516), 46694 states have internal predecessors, (143516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:05,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46695 states to 46695 states and 143516 transitions. [2021-05-03 14:07:05,134 INFO L78 Accepts]: Start accepts. Automaton has 46695 states and 143516 transitions. Word has length 22 [2021-05-03 14:07:05,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:05,134 INFO L480 AbstractCegarLoop]: Abstraction has 46695 states and 143516 transitions. [2021-05-03 14:07:05,134 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) [2021-05-03 14:07:05,134 INFO L276 IsEmpty]: Start isEmpty. Operand 46695 states and 143516 transitions. [2021-05-03 14:07:05,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:05,147 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:05,147 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:05,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10523,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:05,348 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:05,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:05,348 INFO L82 PathProgramCache]: Analyzing trace with hash 414428143, now seen corresponding path program 227 times [2021-05-03 14:07:05,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:05,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873487648] [2021-05-03 14:07:05,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:05,409 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:05,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873487648] [2021-05-03 14:07:05,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144508340] [2021-05-03 14:07:05,410 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 [2021-05-03 14:07:05,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:07:05,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:05,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:05,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:05,482 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:05,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:05,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:07:05,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458727175] [2021-05-03 14:07:05,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:05,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:05,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:05,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:05,482 INFO L87 Difference]: Start difference. First operand 46695 states and 143516 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) [2021-05-03 14:07:05,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:05,742 INFO L93 Difference]: Finished difference Result 49438 states and 151354 transitions. [2021-05-03 14:07:05,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:07:05,742 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 [2021-05-03 14:07:05,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:05,827 INFO L225 Difference]: With dead ends: 49438 [2021-05-03 14:07:05,827 INFO L226 Difference]: Without dead ends: 49438 [2021-05-03 14:07:05,827 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 114.6ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:07:05,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49438 states. [2021-05-03 14:07:06,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49438 to 36426. [2021-05-03 14:07:06,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36426 states, 36425 states have (on average 3.0824433768016473) internal successors, (112278), 36425 states have internal predecessors, (112278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:06,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36426 states to 36426 states and 112278 transitions. [2021-05-03 14:07:06,581 INFO L78 Accepts]: Start accepts. Automaton has 36426 states and 112278 transitions. Word has length 22 [2021-05-03 14:07:06,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:06,581 INFO L480 AbstractCegarLoop]: Abstraction has 36426 states and 112278 transitions. [2021-05-03 14:07:06,581 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) [2021-05-03 14:07:06,581 INFO L276 IsEmpty]: Start isEmpty. Operand 36426 states and 112278 transitions. [2021-05-03 14:07:06,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:06,589 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:06,590 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:06,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10524 [2021-05-03 14:07:06,790 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:06,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:06,790 INFO L82 PathProgramCache]: Analyzing trace with hash -91918123, now seen corresponding path program 228 times [2021-05-03 14:07:06,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:06,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539204865] [2021-05-03 14:07:06,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:06,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:06,855 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:06,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539204865] [2021-05-03 14:07:06,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160037978] [2021-05-03 14:07:06,856 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 [2021-05-03 14:07:06,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:07:06,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:06,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:06,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:06,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:06,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:07:06,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977412964] [2021-05-03 14:07:06,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:06,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:06,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:06,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:06,936 INFO L87 Difference]: Start difference. First operand 36426 states and 112278 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) [2021-05-03 14:07:07,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:07,121 INFO L93 Difference]: Finished difference Result 38526 states and 118284 transitions. [2021-05-03 14:07:07,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:07:07,121 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 [2021-05-03 14:07:07,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:07,180 INFO L225 Difference]: With dead ends: 38526 [2021-05-03 14:07:07,180 INFO L226 Difference]: Without dead ends: 38526 [2021-05-03 14:07:07,180 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:07:07,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38526 states. [2021-05-03 14:07:07,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38526 to 38139. [2021-05-03 14:07:07,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38139 states, 38138 states have (on average 3.0788976873459544) internal successors, (117423), 38138 states have internal predecessors, (117423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:07,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38139 states to 38139 states and 117423 transitions. [2021-05-03 14:07:07,983 INFO L78 Accepts]: Start accepts. Automaton has 38139 states and 117423 transitions. Word has length 22 [2021-05-03 14:07:07,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:07,983 INFO L480 AbstractCegarLoop]: Abstraction has 38139 states and 117423 transitions. [2021-05-03 14:07:07,983 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) [2021-05-03 14:07:07,983 INFO L276 IsEmpty]: Start isEmpty. Operand 38139 states and 117423 transitions. [2021-05-03 14:07:07,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:07,995 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:07,995 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:08,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10525,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:08,195 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:08,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:08,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1391216815, now seen corresponding path program 229 times [2021-05-03 14:07:08,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:08,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781735142] [2021-05-03 14:07:08,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:08,269 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:08,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781735142] [2021-05-03 14:07:08,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634013440] [2021-05-03 14:07:08,269 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 [2021-05-03 14:07:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:08,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:08,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:08,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:08,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:07:08,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309539504] [2021-05-03 14:07:08,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:07:08,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:08,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:07:08,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:07:08,337 INFO L87 Difference]: Start difference. First operand 38139 states and 117423 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) [2021-05-03 14:07:08,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:08,598 INFO L93 Difference]: Finished difference Result 38877 states and 119237 transitions. [2021-05-03 14:07:08,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:07:08,599 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 [2021-05-03 14:07:08,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:08,660 INFO L225 Difference]: With dead ends: 38877 [2021-05-03 14:07:08,661 INFO L226 Difference]: Without dead ends: 38877 [2021-05-03 14:07:08,661 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 160.2ms TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:07:08,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38877 states. [2021-05-03 14:07:09,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38877 to 37259. [2021-05-03 14:07:09,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37259 states, 37258 states have (on average 3.0800096623543936) internal successors, (114755), 37258 states have internal predecessors, (114755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:09,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37259 states to 37259 states and 114755 transitions. [2021-05-03 14:07:09,469 INFO L78 Accepts]: Start accepts. Automaton has 37259 states and 114755 transitions. Word has length 22 [2021-05-03 14:07:09,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:09,469 INFO L480 AbstractCegarLoop]: Abstraction has 37259 states and 114755 transitions. [2021-05-03 14:07:09,469 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) [2021-05-03 14:07:09,469 INFO L276 IsEmpty]: Start isEmpty. Operand 37259 states and 114755 transitions. [2021-05-03 14:07:09,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:09,478 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:09,478 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:09,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10526 [2021-05-03 14:07:09,679 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:09,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:09,679 INFO L82 PathProgramCache]: Analyzing trace with hash 123759637, now seen corresponding path program 230 times [2021-05-03 14:07:09,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:09,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095782948] [2021-05-03 14:07:09,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:09,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:09,758 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:09,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095782948] [2021-05-03 14:07:09,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958804082] [2021-05-03 14:07:09,759 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 [2021-05-03 14:07:09,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:07:09,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:09,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:09,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:09,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:09,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:07:09,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933787813] [2021-05-03 14:07:09,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:07:09,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:09,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:07:09,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:07:09,828 INFO L87 Difference]: Start difference. First operand 37259 states and 114755 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) [2021-05-03 14:07:10,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:10,157 INFO L93 Difference]: Finished difference Result 39004 states and 119600 transitions. [2021-05-03 14:07:10,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:07:10,157 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 [2021-05-03 14:07:10,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:10,214 INFO L225 Difference]: With dead ends: 39004 [2021-05-03 14:07:10,214 INFO L226 Difference]: Without dead ends: 39004 [2021-05-03 14:07:10,214 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 218.0ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:07:10,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39004 states. [2021-05-03 14:07:10,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39004 to 37661. [2021-05-03 14:07:10,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37661 states, 37660 states have (on average 3.0793414763674987) internal successors, (115968), 37660 states have internal predecessors, (115968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:11,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37661 states to 37661 states and 115968 transitions. [2021-05-03 14:07:11,009 INFO L78 Accepts]: Start accepts. Automaton has 37661 states and 115968 transitions. Word has length 22 [2021-05-03 14:07:11,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:11,009 INFO L480 AbstractCegarLoop]: Abstraction has 37661 states and 115968 transitions. [2021-05-03 14:07:11,009 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) [2021-05-03 14:07:11,010 INFO L276 IsEmpty]: Start isEmpty. Operand 37661 states and 115968 transitions. [2021-05-03 14:07:11,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:11,019 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:11,019 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:11,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10527,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:11,219 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:11,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:11,219 INFO L82 PathProgramCache]: Analyzing trace with hash -512707217, now seen corresponding path program 231 times [2021-05-03 14:07:11,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:11,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569025291] [2021-05-03 14:07:11,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:11,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569025291] [2021-05-03 14:07:11,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309996324] [2021-05-03 14:07:11,299 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 [2021-05-03 14:07:11,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:07:11,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:11,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:11,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:11,372 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:11,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:11,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:07:11,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144025534] [2021-05-03 14:07:11,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:07:11,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:11,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:07:11,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:07:11,373 INFO L87 Difference]: Start difference. First operand 37661 states and 115968 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) [2021-05-03 14:07:11,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:11,796 INFO L93 Difference]: Finished difference Result 39220 states and 120135 transitions. [2021-05-03 14:07:11,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 14:07:11,796 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 [2021-05-03 14:07:11,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:11,855 INFO L225 Difference]: With dead ends: 39220 [2021-05-03 14:07:11,855 INFO L226 Difference]: Without dead ends: 39220 [2021-05-03 14:07:11,855 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 311.2ms TimeCoverageRelationStatistics Valid=664, Invalid=1316, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 14:07:11,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39220 states. [2021-05-03 14:07:12,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39220 to 37458. [2021-05-03 14:07:12,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37458 states, 37457 states have (on average 3.08011853592119) internal successors, (115372), 37457 states have internal predecessors, (115372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:12,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37458 states to 37458 states and 115372 transitions. [2021-05-03 14:07:12,637 INFO L78 Accepts]: Start accepts. Automaton has 37458 states and 115372 transitions. Word has length 22 [2021-05-03 14:07:12,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:12,637 INFO L480 AbstractCegarLoop]: Abstraction has 37458 states and 115372 transitions. [2021-05-03 14:07:12,637 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) [2021-05-03 14:07:12,637 INFO L276 IsEmpty]: Start isEmpty. Operand 37458 states and 115372 transitions. [2021-05-03 14:07:12,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:12,646 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:12,647 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:12,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10528 [2021-05-03 14:07:12,847 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:12,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:12,847 INFO L82 PathProgramCache]: Analyzing trace with hash -2054510059, now seen corresponding path program 232 times [2021-05-03 14:07:12,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:12,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560162051] [2021-05-03 14:07:12,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:12,898 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:12,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560162051] [2021-05-03 14:07:12,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964247952] [2021-05-03 14:07:12,898 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 [2021-05-03 14:07:12,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:07:12,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:12,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:12,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:12,953 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:12,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:12,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:07:12,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355848898] [2021-05-03 14:07:12,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:07:12,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:12,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:07:12,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:07:12,954 INFO L87 Difference]: Start difference. First operand 37458 states and 115372 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) [2021-05-03 14:07:13,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:13,226 INFO L93 Difference]: Finished difference Result 37627 states and 115565 transitions. [2021-05-03 14:07:13,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:07:13,227 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 [2021-05-03 14:07:13,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:13,284 INFO L225 Difference]: With dead ends: 37627 [2021-05-03 14:07:13,285 INFO L226 Difference]: Without dead ends: 37623 [2021-05-03 14:07:13,285 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 127.6ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:07:13,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37623 states. [2021-05-03 14:07:13,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37623 to 37458. [2021-05-03 14:07:14,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37458 states, 37457 states have (on average 3.0800117468030006) internal successors, (115368), 37457 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) [2021-05-03 14:07:14,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37458 states to 37458 states and 115368 transitions. [2021-05-03 14:07:14,122 INFO L78 Accepts]: Start accepts. Automaton has 37458 states and 115368 transitions. Word has length 22 [2021-05-03 14:07:14,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:14,122 INFO L480 AbstractCegarLoop]: Abstraction has 37458 states and 115368 transitions. [2021-05-03 14:07:14,122 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) [2021-05-03 14:07:14,122 INFO L276 IsEmpty]: Start isEmpty. Operand 37458 states and 115368 transitions. [2021-05-03 14:07:14,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:14,132 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:14,132 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:14,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10529,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:14,333 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:14,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:14,333 INFO L82 PathProgramCache]: Analyzing trace with hash -324040043, now seen corresponding path program 233 times [2021-05-03 14:07:14,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:14,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288925982] [2021-05-03 14:07:14,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:14,412 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:14,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288925982] [2021-05-03 14:07:14,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518065550] [2021-05-03 14:07:14,413 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 [2021-05-03 14:07:14,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:07:14,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:14,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:14,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:14,488 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:14,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:14,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:07:14,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765777724] [2021-05-03 14:07:14,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:07:14,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:14,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:07:14,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:07:14,489 INFO L87 Difference]: Start difference. First operand 37458 states and 115368 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) [2021-05-03 14:07:14,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:14,857 INFO L93 Difference]: Finished difference Result 44126 states and 134929 transitions. [2021-05-03 14:07:14,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:07:14,858 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 [2021-05-03 14:07:14,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:14,924 INFO L225 Difference]: With dead ends: 44126 [2021-05-03 14:07:14,925 INFO L226 Difference]: Without dead ends: 44126 [2021-05-03 14:07:14,925 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 258.1ms TimeCoverageRelationStatistics Valid=509, Invalid=973, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 14:07:14,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44126 states. [2021-05-03 14:07:15,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44126 to 42198. [2021-05-03 14:07:15,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42198 states, 42197 states have (on average 3.0731331611251984) internal successors, (129677), 42197 states have internal predecessors, (129677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:15,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42198 states to 42198 states and 129677 transitions. [2021-05-03 14:07:15,771 INFO L78 Accepts]: Start accepts. Automaton has 42198 states and 129677 transitions. Word has length 22 [2021-05-03 14:07:15,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:15,771 INFO L480 AbstractCegarLoop]: Abstraction has 42198 states and 129677 transitions. [2021-05-03 14:07:15,771 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) [2021-05-03 14:07:15,771 INFO L276 IsEmpty]: Start isEmpty. Operand 42198 states and 129677 transitions. [2021-05-03 14:07:15,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:15,783 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:15,783 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:15,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10530 [2021-05-03 14:07:15,985 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:15,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:15,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1420323963, now seen corresponding path program 234 times [2021-05-03 14:07:15,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:15,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368680022] [2021-05-03 14:07:15,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:15,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:16,057 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:16,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368680022] [2021-05-03 14:07:16,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163910545] [2021-05-03 14:07:16,058 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 [2021-05-03 14:07:16,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:07:16,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:16,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:16,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:16,123 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:16,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:16,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:07:16,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778769943] [2021-05-03 14:07:16,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:07:16,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:16,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:07:16,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:07:16,124 INFO L87 Difference]: Start difference. First operand 42198 states and 129677 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) [2021-05-03 14:07:16,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:16,456 INFO L93 Difference]: Finished difference Result 46244 states and 141435 transitions. [2021-05-03 14:07:16,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:07:16,457 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 [2021-05-03 14:07:16,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:16,535 INFO L225 Difference]: With dead ends: 46244 [2021-05-03 14:07:16,535 INFO L226 Difference]: Without dead ends: 46244 [2021-05-03 14:07:16,535 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 204.7ms TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:07:16,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46244 states. [2021-05-03 14:07:17,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46244 to 45504. [2021-05-03 14:07:17,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45504 states, 45503 states have (on average 3.068566907676417) internal successors, (139629), 45503 states have internal predecessors, (139629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:17,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45504 states to 45504 states and 139629 transitions. [2021-05-03 14:07:17,389 INFO L78 Accepts]: Start accepts. Automaton has 45504 states and 139629 transitions. Word has length 22 [2021-05-03 14:07:17,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:17,389 INFO L480 AbstractCegarLoop]: Abstraction has 45504 states and 139629 transitions. [2021-05-03 14:07:17,389 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) [2021-05-03 14:07:17,390 INFO L276 IsEmpty]: Start isEmpty. Operand 45504 states and 139629 transitions. [2021-05-03 14:07:17,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:17,403 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:17,403 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:17,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10531 [2021-05-03 14:07:17,604 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:17,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:17,604 INFO L82 PathProgramCache]: Analyzing trace with hash 783857109, now seen corresponding path program 235 times [2021-05-03 14:07:17,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:17,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894611506] [2021-05-03 14:07:17,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:17,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:17,682 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:17,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894611506] [2021-05-03 14:07:17,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690650872] [2021-05-03 14:07:17,682 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 [2021-05-03 14:07:17,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:17,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:17,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:17,748 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:17,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:17,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:07:17,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071915357] [2021-05-03 14:07:17,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:07:17,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:17,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:07:17,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:07:17,749 INFO L87 Difference]: Start difference. First operand 45504 states and 139629 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) [2021-05-03 14:07:18,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:18,179 INFO L93 Difference]: Finished difference Result 47891 states and 146334 transitions. [2021-05-03 14:07:18,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 14:07:18,179 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 [2021-05-03 14:07:18,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:18,246 INFO L225 Difference]: With dead ends: 47891 [2021-05-03 14:07:18,247 INFO L226 Difference]: Without dead ends: 47891 [2021-05-03 14:07:18,247 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 287.0ms TimeCoverageRelationStatistics Valid=614, Invalid=1192, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 14:07:18,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47891 states. [2021-05-03 14:07:18,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47891 to 46839. [2021-05-03 14:07:19,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46839 states, 46838 states have (on average 3.066612579529442) internal successors, (143634), 46838 states have internal predecessors, (143634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:19,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46839 states to 46839 states and 143634 transitions. [2021-05-03 14:07:19,134 INFO L78 Accepts]: Start accepts. Automaton has 46839 states and 143634 transitions. Word has length 22 [2021-05-03 14:07:19,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:19,134 INFO L480 AbstractCegarLoop]: Abstraction has 46839 states and 143634 transitions. [2021-05-03 14:07:19,134 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) [2021-05-03 14:07:19,134 INFO L276 IsEmpty]: Start isEmpty. Operand 46839 states and 143634 transitions. [2021-05-03 14:07:19,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:19,151 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:19,151 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:19,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10532 [2021-05-03 14:07:19,351 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:19,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:19,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1486004305, now seen corresponding path program 236 times [2021-05-03 14:07:19,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:19,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799808860] [2021-05-03 14:07:19,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:19,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:19,404 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:19,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799808860] [2021-05-03 14:07:19,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500784456] [2021-05-03 14:07:19,404 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 [2021-05-03 14:07:19,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:07:19,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:19,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:19,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:19,459 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:19,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:19,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:07:19,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974391710] [2021-05-03 14:07:19,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:07:19,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:19,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:07:19,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:07:19,459 INFO L87 Difference]: Start difference. First operand 46839 states and 143634 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) [2021-05-03 14:07:19,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:19,721 INFO L93 Difference]: Finished difference Result 47040 states and 143931 transitions. [2021-05-03 14:07:19,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:07:19,721 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 [2021-05-03 14:07:19,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:19,796 INFO L225 Difference]: With dead ends: 47040 [2021-05-03 14:07:19,796 INFO L226 Difference]: Without dead ends: 47036 [2021-05-03 14:07:19,796 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:07:19,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47036 states. [2021-05-03 14:07:20,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47036 to 46875. [2021-05-03 14:07:20,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46875 states, 46874 states have (on average 3.066646755130776) internal successors, (143746), 46874 states have internal predecessors, (143746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:20,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46875 states to 46875 states and 143746 transitions. [2021-05-03 14:07:20,699 INFO L78 Accepts]: Start accepts. Automaton has 46875 states and 143746 transitions. Word has length 22 [2021-05-03 14:07:20,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:20,699 INFO L480 AbstractCegarLoop]: Abstraction has 46875 states and 143746 transitions. [2021-05-03 14:07:20,699 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) [2021-05-03 14:07:20,699 INFO L276 IsEmpty]: Start isEmpty. Operand 46875 states and 143746 transitions. [2021-05-03 14:07:20,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:20,713 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:20,713 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:20,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10533,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:20,913 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:20,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:20,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1091213931, now seen corresponding path program 237 times [2021-05-03 14:07:20,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:20,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304870368] [2021-05-03 14:07:20,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:20,967 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:20,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304870368] [2021-05-03 14:07:20,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535448299] [2021-05-03 14:07:20,967 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 [2021-05-03 14:07:20,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:07:20,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:20,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:20,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:21,028 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:21,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:21,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:07:21,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603936462] [2021-05-03 14:07:21,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:07:21,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:21,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:07:21,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:07:21,029 INFO L87 Difference]: Start difference. First operand 46875 states and 143746 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) [2021-05-03 14:07:21,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:21,231 INFO L93 Difference]: Finished difference Result 47717 states and 145917 transitions. [2021-05-03 14:07:21,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:07:21,232 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 [2021-05-03 14:07:21,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:21,309 INFO L225 Difference]: With dead ends: 47717 [2021-05-03 14:07:21,309 INFO L226 Difference]: Without dead ends: 47717 [2021-05-03 14:07:21,309 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=150, Invalid=230, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:07:21,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47717 states. [2021-05-03 14:07:22,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47717 to 46880. [2021-05-03 14:07:22,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46880 states, 46879 states have (on average 3.066639646750144) internal successors, (143761), 46879 states have internal predecessors, (143761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:22,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46880 states to 46880 states and 143761 transitions. [2021-05-03 14:07:22,178 INFO L78 Accepts]: Start accepts. Automaton has 46880 states and 143761 transitions. Word has length 22 [2021-05-03 14:07:22,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:22,178 INFO L480 AbstractCegarLoop]: Abstraction has 46880 states and 143761 transitions. [2021-05-03 14:07:22,178 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) [2021-05-03 14:07:22,178 INFO L276 IsEmpty]: Start isEmpty. Operand 46880 states and 143761 transitions. [2021-05-03 14:07:22,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:22,193 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:22,193 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:22,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10534 [2021-05-03 14:07:22,393 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:22,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:22,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1474706031, now seen corresponding path program 238 times [2021-05-03 14:07:22,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:22,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920186033] [2021-05-03 14:07:22,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:22,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:22,448 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:22,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920186033] [2021-05-03 14:07:22,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637432027] [2021-05-03 14:07:22,448 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 [2021-05-03 14:07:22,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:07:22,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:22,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:22,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:22,513 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:22,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:22,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:07:22,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563790833] [2021-05-03 14:07:22,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:07:22,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:22,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:07:22,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:07:22,514 INFO L87 Difference]: Start difference. First operand 46880 states and 143761 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) [2021-05-03 14:07:22,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:22,931 INFO L93 Difference]: Finished difference Result 48348 states and 147772 transitions. [2021-05-03 14:07:22,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:07:22,931 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 [2021-05-03 14:07:22,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:22,997 INFO L225 Difference]: With dead ends: 48348 [2021-05-03 14:07:22,997 INFO L226 Difference]: Without dead ends: 48348 [2021-05-03 14:07:22,997 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 115.4ms TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:07:23,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48348 states. [2021-05-03 14:07:23,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48348 to 46887. [2021-05-03 14:07:23,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46887 states, 46886 states have (on average 3.066608369236019) internal successors, (143781), 46886 states have internal predecessors, (143781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:23,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46887 states to 46887 states and 143781 transitions. [2021-05-03 14:07:23,666 INFO L78 Accepts]: Start accepts. Automaton has 46887 states and 143781 transitions. Word has length 22 [2021-05-03 14:07:23,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:23,666 INFO L480 AbstractCegarLoop]: Abstraction has 46887 states and 143781 transitions. [2021-05-03 14:07:23,666 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) [2021-05-03 14:07:23,666 INFO L276 IsEmpty]: Start isEmpty. Operand 46887 states and 143781 transitions. [2021-05-03 14:07:23,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:23,682 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:23,682 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:23,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10535 [2021-05-03 14:07:23,882 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:23,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:23,882 INFO L82 PathProgramCache]: Analyzing trace with hash -586153771, now seen corresponding path program 239 times [2021-05-03 14:07:23,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:23,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744922224] [2021-05-03 14:07:23,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:23,939 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:23,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744922224] [2021-05-03 14:07:23,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824519836] [2021-05-03 14:07:23,939 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 [2021-05-03 14:07:23,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:07:23,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:23,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:23,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:24,009 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:24,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:24,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:07:24,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999642805] [2021-05-03 14:07:24,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:07:24,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:24,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:07:24,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:07:24,010 INFO L87 Difference]: Start difference. First operand 46887 states and 143781 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) [2021-05-03 14:07:24,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:24,461 INFO L93 Difference]: Finished difference Result 64639 states and 196977 transitions. [2021-05-03 14:07:24,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:07:24,462 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 [2021-05-03 14:07:24,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:24,579 INFO L225 Difference]: With dead ends: 64639 [2021-05-03 14:07:24,579 INFO L226 Difference]: Without dead ends: 64639 [2021-05-03 14:07:24,579 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=253, Invalid=449, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:07:24,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64639 states. [2021-05-03 14:07:25,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64639 to 61565. [2021-05-03 14:07:25,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61565 states, 61564 states have (on average 3.058508219089078) internal successors, (188294), 61564 states have internal predecessors, (188294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:25,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61565 states to 61565 states and 188294 transitions. [2021-05-03 14:07:25,728 INFO L78 Accepts]: Start accepts. Automaton has 61565 states and 188294 transitions. Word has length 22 [2021-05-03 14:07:25,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:25,728 INFO L480 AbstractCegarLoop]: Abstraction has 61565 states and 188294 transitions. [2021-05-03 14:07:25,728 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) [2021-05-03 14:07:25,728 INFO L276 IsEmpty]: Start isEmpty. Operand 61565 states and 188294 transitions. [2021-05-03 14:07:25,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:25,746 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:25,746 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:25,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10536,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:25,947 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:25,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:25,947 INFO L82 PathProgramCache]: Analyzing trace with hash -48298193, now seen corresponding path program 240 times [2021-05-03 14:07:25,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:25,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720348901] [2021-05-03 14:07:25,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:26,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720348901] [2021-05-03 14:07:26,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255804678] [2021-05-03 14:07:26,009 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 [2021-05-03 14:07:26,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:07:26,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:26,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:26,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:26,082 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:26,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:26,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:07:26,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738929963] [2021-05-03 14:07:26,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:26,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:26,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:26,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:26,083 INFO L87 Difference]: Start difference. First operand 61565 states and 188294 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) [2021-05-03 14:07:26,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:26,423 INFO L93 Difference]: Finished difference Result 64066 states and 195284 transitions. [2021-05-03 14:07:26,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:07:26,424 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 [2021-05-03 14:07:26,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:26,525 INFO L225 Difference]: With dead ends: 64066 [2021-05-03 14:07:26,525 INFO L226 Difference]: Without dead ends: 64066 [2021-05-03 14:07:26,525 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 144.4ms TimeCoverageRelationStatistics Valid=268, Invalid=488, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:07:26,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64066 states. [2021-05-03 14:07:27,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64066 to 61726. [2021-05-03 14:07:27,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61726 states, 61725 states have (on average 3.0580639935196436) internal successors, (188759), 61725 states have internal predecessors, (188759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:27,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61726 states to 61726 states and 188759 transitions. [2021-05-03 14:07:27,785 INFO L78 Accepts]: Start accepts. Automaton has 61726 states and 188759 transitions. Word has length 22 [2021-05-03 14:07:27,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:27,785 INFO L480 AbstractCegarLoop]: Abstraction has 61726 states and 188759 transitions. [2021-05-03 14:07:27,785 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) [2021-05-03 14:07:27,786 INFO L276 IsEmpty]: Start isEmpty. Operand 61726 states and 188759 transitions. [2021-05-03 14:07:27,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:27,804 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:27,804 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:28,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10537,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:28,004 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:28,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:28,005 INFO L82 PathProgramCache]: Analyzing trace with hash -554644459, now seen corresponding path program 241 times [2021-05-03 14:07:28,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:28,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159518806] [2021-05-03 14:07:28,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:28,067 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:28,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159518806] [2021-05-03 14:07:28,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764323125] [2021-05-03 14:07:28,068 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 [2021-05-03 14:07:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:28,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:28,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:28,131 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:28,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:28,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:07:28,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512669077] [2021-05-03 14:07:28,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:28,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:28,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:28,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:28,132 INFO L87 Difference]: Start difference. First operand 61726 states and 188759 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) [2021-05-03 14:07:28,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:28,657 INFO L93 Difference]: Finished difference Result 73057 states and 222493 transitions. [2021-05-03 14:07:28,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:07:28,657 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 [2021-05-03 14:07:28,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:28,796 INFO L225 Difference]: With dead ends: 73057 [2021-05-03 14:07:28,796 INFO L226 Difference]: Without dead ends: 73057 [2021-05-03 14:07:28,796 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 130.6ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:07:28,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73057 states. [2021-05-03 14:07:29,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73057 to 71622. [2021-05-03 14:07:29,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71622 states, 71621 states have (on average 3.051926111056813) internal successors, (218582), 71621 states have internal predecessors, (218582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:30,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71622 states to 71622 states and 218582 transitions. [2021-05-03 14:07:30,070 INFO L78 Accepts]: Start accepts. Automaton has 71622 states and 218582 transitions. Word has length 22 [2021-05-03 14:07:30,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:30,070 INFO L480 AbstractCegarLoop]: Abstraction has 71622 states and 218582 transitions. [2021-05-03 14:07:30,070 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) [2021-05-03 14:07:30,070 INFO L276 IsEmpty]: Start isEmpty. Operand 71622 states and 218582 transitions. [2021-05-03 14:07:30,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:30,087 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:30,087 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:30,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10538 [2021-05-03 14:07:30,313 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:30,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:30,313 INFO L82 PathProgramCache]: Analyzing trace with hash 928490479, now seen corresponding path program 242 times [2021-05-03 14:07:30,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:30,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218895838] [2021-05-03 14:07:30,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:30,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218895838] [2021-05-03 14:07:30,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333670282] [2021-05-03 14:07:30,382 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 [2021-05-03 14:07:30,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:07:30,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:30,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:30,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:30,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:30,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:07:30,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466295947] [2021-05-03 14:07:30,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:30,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:30,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:30,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:30,449 INFO L87 Difference]: Start difference. First operand 71622 states and 218582 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) [2021-05-03 14:07:30,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:30,775 INFO L93 Difference]: Finished difference Result 76219 states and 232111 transitions. [2021-05-03 14:07:30,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:07:30,776 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 [2021-05-03 14:07:30,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:30,911 INFO L225 Difference]: With dead ends: 76219 [2021-05-03 14:07:30,911 INFO L226 Difference]: Without dead ends: 76219 [2021-05-03 14:07:30,911 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:07:30,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76219 states. [2021-05-03 14:07:32,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76219 to 75735. [2021-05-03 14:07:32,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75735 states, 75734 states have (on average 3.0491588982491353) internal successors, (230925), 75734 states have internal predecessors, (230925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:32,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75735 states to 75735 states and 230925 transitions. [2021-05-03 14:07:32,584 INFO L78 Accepts]: Start accepts. Automaton has 75735 states and 230925 transitions. Word has length 22 [2021-05-03 14:07:32,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:32,585 INFO L480 AbstractCegarLoop]: Abstraction has 75735 states and 230925 transitions. [2021-05-03 14:07:32,585 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) [2021-05-03 14:07:32,585 INFO L276 IsEmpty]: Start isEmpty. Operand 75735 states and 230925 transitions. [2021-05-03 14:07:32,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:32,603 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:32,603 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:32,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10539,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:32,803 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:32,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:32,804 INFO L82 PathProgramCache]: Analyzing trace with hash -338966699, now seen corresponding path program 243 times [2021-05-03 14:07:32,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:32,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482625730] [2021-05-03 14:07:32,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:32,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:32,879 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:32,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482625730] [2021-05-03 14:07:32,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886663864] [2021-05-03 14:07:32,879 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 [2021-05-03 14:07:32,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:07:32,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:32,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:32,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:32,947 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:32,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:32,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:07:32,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077546205] [2021-05-03 14:07:32,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:07:32,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:32,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:07:32,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:07:32,947 INFO L87 Difference]: Start difference. First operand 75735 states and 230925 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) [2021-05-03 14:07:33,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:33,358 INFO L93 Difference]: Finished difference Result 76769 states and 233709 transitions. [2021-05-03 14:07:33,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:07:33,359 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 [2021-05-03 14:07:33,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:33,504 INFO L225 Difference]: With dead ends: 76769 [2021-05-03 14:07:33,504 INFO L226 Difference]: Without dead ends: 76769 [2021-05-03 14:07:33,504 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 181.0ms TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:07:33,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76769 states. [2021-05-03 14:07:34,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76769 to 75772. [2021-05-03 14:07:34,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75772 states, 75771 states have (on average 3.0491348932969076) internal successors, (231036), 75771 states have internal predecessors, (231036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:35,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75772 states to 75772 states and 231036 transitions. [2021-05-03 14:07:35,395 INFO L78 Accepts]: Start accepts. Automaton has 75772 states and 231036 transitions. Word has length 22 [2021-05-03 14:07:35,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:35,395 INFO L480 AbstractCegarLoop]: Abstraction has 75772 states and 231036 transitions. [2021-05-03 14:07:35,395 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) [2021-05-03 14:07:35,395 INFO L276 IsEmpty]: Start isEmpty. Operand 75772 states and 231036 transitions. [2021-05-03 14:07:35,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:35,422 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:35,422 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:35,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10540 [2021-05-03 14:07:35,638 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:35,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:35,638 INFO L82 PathProgramCache]: Analyzing trace with hash -975433553, now seen corresponding path program 244 times [2021-05-03 14:07:35,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:35,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31181467] [2021-05-03 14:07:35,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:35,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:35,750 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:35,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31181467] [2021-05-03 14:07:35,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253844469] [2021-05-03 14:07:35,750 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 [2021-05-03 14:07:35,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:07:35,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:35,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:35,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:35,829 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:35,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:35,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:07:35,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101873206] [2021-05-03 14:07:35,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:07:35,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:35,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:07:35,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:07:35,830 INFO L87 Difference]: Start difference. First operand 75772 states and 231036 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) [2021-05-03 14:07:36,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:36,341 INFO L93 Difference]: Finished difference Result 77589 states and 236129 transitions. [2021-05-03 14:07:36,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:07:36,342 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 [2021-05-03 14:07:36,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:36,488 INFO L225 Difference]: With dead ends: 77589 [2021-05-03 14:07:36,488 INFO L226 Difference]: Without dead ends: 77589 [2021-05-03 14:07:36,488 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 275.8ms TimeCoverageRelationStatistics Valid=427, Invalid=905, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 14:07:36,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77589 states. [2021-05-03 14:07:37,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77589 to 76898. [2021-05-03 14:07:37,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76898 states, 76897 states have (on average 3.048415412824948) internal successors, (234414), 76897 states have internal predecessors, (234414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:37,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76898 states to 76898 states and 234414 transitions. [2021-05-03 14:07:37,974 INFO L78 Accepts]: Start accepts. Automaton has 76898 states and 234414 transitions. Word has length 22 [2021-05-03 14:07:37,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:37,975 INFO L480 AbstractCegarLoop]: Abstraction has 76898 states and 234414 transitions. [2021-05-03 14:07:37,975 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) [2021-05-03 14:07:37,975 INFO L276 IsEmpty]: Start isEmpty. Operand 76898 states and 234414 transitions. [2021-05-03 14:07:37,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:37,995 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:37,995 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:38,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10541,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:38,196 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:38,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:38,196 INFO L82 PathProgramCache]: Analyzing trace with hash 768930453, now seen corresponding path program 245 times [2021-05-03 14:07:38,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:38,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290761955] [2021-05-03 14:07:38,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:38,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:38,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290761955] [2021-05-03 14:07:38,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347275258] [2021-05-03 14:07:38,288 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 [2021-05-03 14:07:38,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:07:38,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:38,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:38,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:38,362 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:38,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:38,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:07:38,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774017311] [2021-05-03 14:07:38,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:07:38,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:38,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:07:38,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:07:38,362 INFO L87 Difference]: Start difference. First operand 76898 states and 234414 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) [2021-05-03 14:07:39,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:39,168 INFO L93 Difference]: Finished difference Result 78959 states and 240117 transitions. [2021-05-03 14:07:39,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 14:07:39,168 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 [2021-05-03 14:07:39,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:39,309 INFO L225 Difference]: With dead ends: 78959 [2021-05-03 14:07:39,309 INFO L226 Difference]: Without dead ends: 78959 [2021-05-03 14:07:39,309 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 337.5ms TimeCoverageRelationStatistics Valid=664, Invalid=1316, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 14:07:39,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78959 states. [2021-05-03 14:07:40,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78959 to 77340. [2021-05-03 14:07:40,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77340 states, 77339 states have (on average 3.048138713973545) internal successors, (235740), 77339 states have internal predecessors, (235740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:40,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77340 states to 77340 states and 235740 transitions. [2021-05-03 14:07:40,735 INFO L78 Accepts]: Start accepts. Automaton has 77340 states and 235740 transitions. Word has length 22 [2021-05-03 14:07:40,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:40,735 INFO L480 AbstractCegarLoop]: Abstraction has 77340 states and 235740 transitions. [2021-05-03 14:07:40,735 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) [2021-05-03 14:07:40,735 INFO L276 IsEmpty]: Start isEmpty. Operand 77340 states and 235740 transitions. [2021-05-03 14:07:40,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:40,755 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:40,756 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:40,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10542 [2021-05-03 14:07:40,956 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:40,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:40,956 INFO L82 PathProgramCache]: Analyzing trace with hash -928937975, now seen corresponding path program 246 times [2021-05-03 14:07:40,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:40,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677682683] [2021-05-03 14:07:40,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:41,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677682683] [2021-05-03 14:07:41,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186424096] [2021-05-03 14:07:41,048 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 [2021-05-03 14:07:41,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:07:41,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:41,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:41,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:41,110 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:41,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:41,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-05-03 14:07:41,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084971697] [2021-05-03 14:07:41,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:07:41,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:41,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:07:41,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:07:41,111 INFO L87 Difference]: Start difference. First operand 77340 states and 235740 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) [2021-05-03 14:07:41,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:41,948 INFO L93 Difference]: Finished difference Result 77569 states and 236048 transitions. [2021-05-03 14:07:41,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 14:07:41,948 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 [2021-05-03 14:07:41,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:42,076 INFO L225 Difference]: With dead ends: 77569 [2021-05-03 14:07:42,076 INFO L226 Difference]: Without dead ends: 77563 [2021-05-03 14:07:42,076 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 273.8ms TimeCoverageRelationStatistics Valid=380, Invalid=742, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 14:07:42,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77563 states. [2021-05-03 14:07:43,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77563 to 77255. [2021-05-03 14:07:43,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77255 states, 77254 states have (on average 3.0479198488104178) internal successors, (235464), 77254 states have internal predecessors, (235464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:43,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77255 states to 77255 states and 235464 transitions. [2021-05-03 14:07:43,453 INFO L78 Accepts]: Start accepts. Automaton has 77255 states and 235464 transitions. Word has length 22 [2021-05-03 14:07:43,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:43,453 INFO L480 AbstractCegarLoop]: Abstraction has 77255 states and 235464 transitions. [2021-05-03 14:07:43,454 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) [2021-05-03 14:07:43,454 INFO L276 IsEmpty]: Start isEmpty. Operand 77255 states and 235464 transitions. [2021-05-03 14:07:43,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:43,476 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:43,476 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:43,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10543,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:43,684 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:43,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:43,684 INFO L82 PathProgramCache]: Analyzing trace with hash -879550451, now seen corresponding path program 247 times [2021-05-03 14:07:43,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:43,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346421167] [2021-05-03 14:07:43,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:43,757 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:43,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346421167] [2021-05-03 14:07:43,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566375361] [2021-05-03 14:07:43,757 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 [2021-05-03 14:07:43,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:43,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:43,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:43,831 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:43,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:43,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-05-03 14:07:43,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733931899] [2021-05-03 14:07:43,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:07:43,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:43,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:07:43,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:07:43,832 INFO L87 Difference]: Start difference. First operand 77255 states and 235464 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) [2021-05-03 14:07:44,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:44,379 INFO L93 Difference]: Finished difference Result 105545 states and 320390 transitions. [2021-05-03 14:07:44,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:07:44,380 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 [2021-05-03 14:07:44,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:44,605 INFO L225 Difference]: With dead ends: 105545 [2021-05-03 14:07:44,605 INFO L226 Difference]: Without dead ends: 105545 [2021-05-03 14:07:44,606 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 223.9ms TimeCoverageRelationStatistics Valid=404, Invalid=786, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:07:44,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105545 states. [2021-05-03 14:07:46,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105545 to 103725. [2021-05-03 14:07:46,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103725 states, 103724 states have (on average 3.03849639427712) internal successors, (315165), 103724 states have internal predecessors, (315165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:46,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103725 states to 103725 states and 315165 transitions. [2021-05-03 14:07:46,770 INFO L78 Accepts]: Start accepts. Automaton has 103725 states and 315165 transitions. Word has length 22 [2021-05-03 14:07:46,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:46,770 INFO L480 AbstractCegarLoop]: Abstraction has 103725 states and 315165 transitions. [2021-05-03 14:07:46,770 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) [2021-05-03 14:07:46,770 INFO L276 IsEmpty]: Start isEmpty. Operand 103725 states and 315165 transitions. [2021-05-03 14:07:46,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:46,800 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:46,800 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:47,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10544 [2021-05-03 14:07:47,001 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:47,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:47,001 INFO L82 PathProgramCache]: Analyzing trace with hash 603584487, now seen corresponding path program 248 times [2021-05-03 14:07:47,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:47,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148957110] [2021-05-03 14:07:47,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:47,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:47,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148957110] [2021-05-03 14:07:47,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642406558] [2021-05-03 14:07:47,085 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 [2021-05-03 14:07:47,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:07:47,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:47,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:47,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:47,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:47,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-03 14:07:47,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529341081] [2021-05-03 14:07:47,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:07:47,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:47,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:07:47,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:07:47,163 INFO L87 Difference]: Start difference. First operand 103725 states and 315165 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) [2021-05-03 14:07:48,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:48,068 INFO L93 Difference]: Finished difference Result 114469 states and 347083 transitions. [2021-05-03 14:07:48,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:07:48,069 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 [2021-05-03 14:07:48,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:48,322 INFO L225 Difference]: With dead ends: 114469 [2021-05-03 14:07:48,322 INFO L226 Difference]: Without dead ends: 114469 [2021-05-03 14:07:48,323 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 249.0ms TimeCoverageRelationStatistics Valid=445, Invalid=887, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 14:07:48,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114469 states. [2021-05-03 14:07:49,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114469 to 89851. [2021-05-03 14:07:50,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89851 states, 89850 states have (on average 3.041469115191987) internal successors, (273276), 89850 states have internal predecessors, (273276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:50,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89851 states to 89851 states and 273276 transitions. [2021-05-03 14:07:50,474 INFO L78 Accepts]: Start accepts. Automaton has 89851 states and 273276 transitions. Word has length 22 [2021-05-03 14:07:50,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:50,474 INFO L480 AbstractCegarLoop]: Abstraction has 89851 states and 273276 transitions. [2021-05-03 14:07:50,474 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) [2021-05-03 14:07:50,474 INFO L276 IsEmpty]: Start isEmpty. Operand 89851 states and 273276 transitions. [2021-05-03 14:07:50,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:50,497 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:50,497 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:50,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10545 [2021-05-03 14:07:50,698 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:50,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:50,698 INFO L82 PathProgramCache]: Analyzing trace with hash -663872691, now seen corresponding path program 249 times [2021-05-03 14:07:50,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:50,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191227003] [2021-05-03 14:07:50,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:50,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191227003] [2021-05-03 14:07:50,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545719538] [2021-05-03 14:07:50,784 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 [2021-05-03 14:07:50,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:07:50,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:50,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:50,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:50,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:50,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-03 14:07:50,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077798802] [2021-05-03 14:07:50,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:07:50,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:50,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:07:50,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:07:50,862 INFO L87 Difference]: Start difference. First operand 89851 states and 273276 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) [2021-05-03 14:07:51,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:51,554 INFO L93 Difference]: Finished difference Result 104983 states and 318293 transitions. [2021-05-03 14:07:51,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 14:07:51,555 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 [2021-05-03 14:07:51,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:51,766 INFO L225 Difference]: With dead ends: 104983 [2021-05-03 14:07:51,766 INFO L226 Difference]: Without dead ends: 104983 [2021-05-03 14:07:51,766 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 336.3ms TimeCoverageRelationStatistics Valid=732, Invalid=1430, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 14:07:51,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104983 states. [2021-05-03 14:07:53,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104983 to 90067. [2021-05-03 14:07:53,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90067 states, 90066 states have (on average 3.0419581196011816) internal successors, (273977), 90066 states have internal predecessors, (273977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:53,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90067 states to 90067 states and 273977 transitions. [2021-05-03 14:07:53,760 INFO L78 Accepts]: Start accepts. Automaton has 90067 states and 273977 transitions. Word has length 22 [2021-05-03 14:07:53,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:53,760 INFO L480 AbstractCegarLoop]: Abstraction has 90067 states and 273977 transitions. [2021-05-03 14:07:53,760 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) [2021-05-03 14:07:53,760 INFO L276 IsEmpty]: Start isEmpty. Operand 90067 states and 273977 transitions. [2021-05-03 14:07:53,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:53,782 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:53,783 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:53,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10546 [2021-05-03 14:07:53,983 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:53,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:53,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1300339545, now seen corresponding path program 250 times [2021-05-03 14:07:53,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:53,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105317424] [2021-05-03 14:07:53,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:53,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:54,075 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:54,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105317424] [2021-05-03 14:07:54,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713323957] [2021-05-03 14:07:54,075 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 [2021-05-03 14:07:54,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:07:54,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:54,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:54,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:54,154 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:54,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:54,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-03 14:07:54,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716772759] [2021-05-03 14:07:54,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:07:54,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:54,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:07:54,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:07:54,155 INFO L87 Difference]: Start difference. First operand 90067 states and 273977 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) [2021-05-03 14:07:54,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:54,979 INFO L93 Difference]: Finished difference Result 104672 states and 317280 transitions. [2021-05-03 14:07:54,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 14:07:54,980 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 [2021-05-03 14:07:54,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:55,192 INFO L225 Difference]: With dead ends: 104672 [2021-05-03 14:07:55,192 INFO L226 Difference]: Without dead ends: 104672 [2021-05-03 14:07:55,192 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 448.4ms TimeCoverageRelationStatistics Valid=993, Invalid=1977, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 14:07:55,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104672 states. [2021-05-03 14:07:56,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104672 to 90821. [2021-05-03 14:07:56,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90821 states, 90820 states have (on average 3.041995155252147) internal successors, (276274), 90820 states have internal predecessors, (276274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:57,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90821 states to 90821 states and 276274 transitions. [2021-05-03 14:07:57,220 INFO L78 Accepts]: Start accepts. Automaton has 90821 states and 276274 transitions. Word has length 22 [2021-05-03 14:07:57,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:57,220 INFO L480 AbstractCegarLoop]: Abstraction has 90821 states and 276274 transitions. [2021-05-03 14:07:57,220 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) [2021-05-03 14:07:57,220 INFO L276 IsEmpty]: Start isEmpty. Operand 90821 states and 276274 transitions. [2021-05-03 14:07:57,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:57,244 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:57,244 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:57,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10547 [2021-05-03 14:07:57,445 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:57,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:57,445 INFO L82 PathProgramCache]: Analyzing trace with hash 632691635, now seen corresponding path program 251 times [2021-05-03 14:07:57,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:57,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809349174] [2021-05-03 14:07:57,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:57,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:57,528 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:57,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809349174] [2021-05-03 14:07:57,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137125320] [2021-05-03 14:07:57,529 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 [2021-05-03 14:07:57,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:07:57,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:57,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:57,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:57,606 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:57,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:57,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-03 14:07:57,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048069159] [2021-05-03 14:07:57,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:07:57,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:57,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:07:57,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:07:57,607 INFO L87 Difference]: Start difference. First operand 90821 states and 276274 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) [2021-05-03 14:07:58,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:58,624 INFO L93 Difference]: Finished difference Result 105621 states and 320343 transitions. [2021-05-03 14:07:58,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 14:07:58,625 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 [2021-05-03 14:07:58,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:58,842 INFO L225 Difference]: With dead ends: 105621 [2021-05-03 14:07:58,843 INFO L226 Difference]: Without dead ends: 105621 [2021-05-03 14:07:58,843 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 324.5ms TimeCoverageRelationStatistics Valid=670, Invalid=1310, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 14:07:58,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105621 states. [2021-05-03 14:08:00,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105621 to 87948. [2021-05-03 14:08:00,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87948 states, 87947 states have (on average 3.0435716965899915) internal successors, (267673), 87947 states have internal predecessors, (267673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:00,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87948 states to 87948 states and 267673 transitions. [2021-05-03 14:08:00,693 INFO L78 Accepts]: Start accepts. Automaton has 87948 states and 267673 transitions. Word has length 22 [2021-05-03 14:08:00,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:00,693 INFO L480 AbstractCegarLoop]: Abstraction has 87948 states and 267673 transitions. [2021-05-03 14:08:00,693 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) [2021-05-03 14:08:00,693 INFO L276 IsEmpty]: Start isEmpty. Operand 87948 states and 267673 transitions. [2021-05-03 14:08:00,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:00,721 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:00,721 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:00,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10548,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:00,937 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:00,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:00,943 INFO L82 PathProgramCache]: Analyzing trace with hash -3775219, now seen corresponding path program 252 times [2021-05-03 14:08:00,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:00,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417720857] [2021-05-03 14:08:00,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:00,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:01,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417720857] [2021-05-03 14:08:01,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727351582] [2021-05-03 14:08:01,213 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) [2021-05-03 14:08:01,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:08:01,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:01,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:01,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:01,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:01,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-03 14:08:01,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654012035] [2021-05-03 14:08:01,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:08:01,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:01,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:08:01,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:08:01,320 INFO L87 Difference]: Start difference. First operand 87948 states and 267673 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) [2021-05-03 14:08:01,964 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-05-03 14:08:02,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:02,449 INFO L93 Difference]: Finished difference Result 96355 states and 292373 transitions. [2021-05-03 14:08:02,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 14:08:02,455 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 [2021-05-03 14:08:02,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:02,667 INFO L225 Difference]: With dead ends: 96355 [2021-05-03 14:08:02,667 INFO L226 Difference]: Without dead ends: 96355 [2021-05-03 14:08:02,669 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 931.3ms TimeCoverageRelationStatistics Valid=929, Invalid=1827, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 14:08:02,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96355 states. [2021-05-03 14:08:04,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96355 to 89848. [2021-05-03 14:08:04,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89848 states, 89847 states have (on average 3.042728193484479) internal successors, (273380), 89847 states have internal predecessors, (273380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:05,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89848 states to 89848 states and 273380 transitions. [2021-05-03 14:08:05,120 INFO L78 Accepts]: Start accepts. Automaton has 89848 states and 273380 transitions. Word has length 22 [2021-05-03 14:08:05,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:05,120 INFO L480 AbstractCegarLoop]: Abstraction has 89848 states and 273380 transitions. [2021-05-03 14:08:05,120 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) [2021-05-03 14:08:05,120 INFO L276 IsEmpty]: Start isEmpty. Operand 89848 states and 273380 transitions. [2021-05-03 14:08:05,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:05,149 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:05,149 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:05,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10549,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:05,365 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:05,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:05,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1342276787, now seen corresponding path program 253 times [2021-05-03 14:08:05,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:05,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693825653] [2021-05-03 14:08:05,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:05,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:05,443 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:05,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693825653] [2021-05-03 14:08:05,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035592785] [2021-05-03 14:08:05,443 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 [2021-05-03 14:08:05,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:05,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:05,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:05,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:05,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-05-03 14:08:05,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861186298] [2021-05-03 14:08:05,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:08:05,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:05,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:08:05,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:08:05,556 INFO L87 Difference]: Start difference. First operand 89848 states and 273380 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) [2021-05-03 14:08:06,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:06,116 INFO L93 Difference]: Finished difference Result 91563 states and 278140 transitions. [2021-05-03 14:08:06,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:08:06,116 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 [2021-05-03 14:08:06,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:06,301 INFO L225 Difference]: With dead ends: 91563 [2021-05-03 14:08:06,301 INFO L226 Difference]: Without dead ends: 91563 [2021-05-03 14:08:06,302 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 251.5ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:08:06,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91563 states. [2021-05-03 14:08:07,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91563 to 85666. [2021-05-03 14:08:07,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85666 states, 85665 states have (on average 3.044347166287282) internal successors, (260794), 85665 states have internal predecessors, (260794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:08,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85666 states to 85666 states and 260794 transitions. [2021-05-03 14:08:08,632 INFO L78 Accepts]: Start accepts. Automaton has 85666 states and 260794 transitions. Word has length 22 [2021-05-03 14:08:08,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:08,632 INFO L480 AbstractCegarLoop]: Abstraction has 85666 states and 260794 transitions. [2021-05-03 14:08:08,632 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) [2021-05-03 14:08:08,632 INFO L276 IsEmpty]: Start isEmpty. Operand 85666 states and 260794 transitions. [2021-05-03 14:08:08,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:08,655 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:08,655 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:08,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10550 [2021-05-03 14:08:08,870 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:08,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:08,870 INFO L82 PathProgramCache]: Analyzing trace with hash 140858151, now seen corresponding path program 254 times [2021-05-03 14:08:08,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:08,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498250926] [2021-05-03 14:08:08,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:08,953 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:08:08,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498250926] [2021-05-03 14:08:08,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346993623] [2021-05-03 14:08:08,954 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 [2021-05-03 14:08:08,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:08:08,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:08,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:08,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:08:09,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:09,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-05-03 14:08:09,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993965741] [2021-05-03 14:08:09,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:08:09,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:09,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:08:09,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:08:09,054 INFO L87 Difference]: Start difference. First operand 85666 states and 260794 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) [2021-05-03 14:08:09,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:09,598 INFO L93 Difference]: Finished difference Result 90021 states and 273590 transitions. [2021-05-03 14:08:09,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:08:09,599 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 [2021-05-03 14:08:09,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:09,772 INFO L225 Difference]: With dead ends: 90021 [2021-05-03 14:08:09,773 INFO L226 Difference]: Without dead ends: 90021 [2021-05-03 14:08:09,773 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 244.5ms TimeCoverageRelationStatistics Valid=323, Invalid=733, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:08:09,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90021 states. [2021-05-03 14:08:11,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90021 to 89587. [2021-05-03 14:08:11,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89587 states, 89586 states have (on average 3.0424173419954013) internal successors, (272558), 89586 states have internal predecessors, (272558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:11,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89587 states to 89587 states and 272558 transitions. [2021-05-03 14:08:11,847 INFO L78 Accepts]: Start accepts. Automaton has 89587 states and 272558 transitions. Word has length 22 [2021-05-03 14:08:11,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:11,847 INFO L480 AbstractCegarLoop]: Abstraction has 89587 states and 272558 transitions. [2021-05-03 14:08:11,848 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) [2021-05-03 14:08:11,848 INFO L276 IsEmpty]: Start isEmpty. Operand 89587 states and 272558 transitions. [2021-05-03 14:08:11,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:11,872 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:11,872 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:12,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10551,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:12,087 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:12,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:12,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1126599027, now seen corresponding path program 255 times [2021-05-03 14:08:12,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:12,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080715731] [2021-05-03 14:08:12,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:12,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:12,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080715731] [2021-05-03 14:08:12,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963946258] [2021-05-03 14:08:12,180 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:08:12,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:08:12,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:12,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:12,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:12,277 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:12,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:12,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-03 14:08:12,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141169906] [2021-05-03 14:08:12,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:08:12,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:12,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:08:12,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:08:12,281 INFO L87 Difference]: Start difference. First operand 89587 states and 272558 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) [2021-05-03 14:08:12,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:12,916 INFO L93 Difference]: Finished difference Result 91085 states and 276674 transitions. [2021-05-03 14:08:12,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:08:12,924 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 [2021-05-03 14:08:12,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:13,116 INFO L225 Difference]: With dead ends: 91085 [2021-05-03 14:08:13,117 INFO L226 Difference]: Without dead ends: 91085 [2021-05-03 14:08:13,117 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 332.8ms TimeCoverageRelationStatistics Valid=542, Invalid=1098, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 14:08:13,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91085 states. [2021-05-03 14:08:14,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91085 to 87184. [2021-05-03 14:08:15,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87184 states, 87183 states have (on average 3.043563538763291) internal successors, (265347), 87183 states have internal predecessors, (265347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:15,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87184 states to 87184 states and 265347 transitions. [2021-05-03 14:08:15,252 INFO L78 Accepts]: Start accepts. Automaton has 87184 states and 265347 transitions. Word has length 22 [2021-05-03 14:08:15,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:15,252 INFO L480 AbstractCegarLoop]: Abstraction has 87184 states and 265347 transitions. [2021-05-03 14:08:15,252 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) [2021-05-03 14:08:15,252 INFO L276 IsEmpty]: Start isEmpty. Operand 87184 states and 265347 transitions. [2021-05-03 14:08:15,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:15,278 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:15,278 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:15,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10552 [2021-05-03 14:08:15,494 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:15,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:15,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1763065881, now seen corresponding path program 256 times [2021-05-03 14:08:15,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:15,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533136345] [2021-05-03 14:08:15,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:15,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533136345] [2021-05-03 14:08:15,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237157914] [2021-05-03 14:08:15,625 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 [2021-05-03 14:08:15,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:08:15,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:15,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:15,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:15,722 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:15,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:15,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-03 14:08:15,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475748311] [2021-05-03 14:08:15,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:08:15,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:15,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:08:15,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:08:15,723 INFO L87 Difference]: Start difference. First operand 87184 states and 265347 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) [2021-05-03 14:08:16,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:16,455 INFO L93 Difference]: Finished difference Result 89148 states and 270843 transitions. [2021-05-03 14:08:16,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 14:08:16,465 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 [2021-05-03 14:08:16,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:16,639 INFO L225 Difference]: With dead ends: 89148 [2021-05-03 14:08:16,639 INFO L226 Difference]: Without dead ends: 89148 [2021-05-03 14:08:16,639 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 434.7ms TimeCoverageRelationStatistics Valid=790, Invalid=1562, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 14:08:16,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89148 states. [2021-05-03 14:08:18,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89148 to 87528. [2021-05-03 14:08:18,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87528 states, 87527 states have (on average 3.0433923246541066) internal successors, (266379), 87527 states have internal predecessors, (266379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:18,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87528 states to 87528 states and 266379 transitions. [2021-05-03 14:08:18,799 INFO L78 Accepts]: Start accepts. Automaton has 87528 states and 266379 transitions. Word has length 22 [2021-05-03 14:08:18,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:18,799 INFO L480 AbstractCegarLoop]: Abstraction has 87528 states and 266379 transitions. [2021-05-03 14:08:18,799 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) [2021-05-03 14:08:18,799 INFO L276 IsEmpty]: Start isEmpty. Operand 87528 states and 266379 transitions. [2021-05-03 14:08:18,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:18,825 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:18,825 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:19,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10553 [2021-05-03 14:08:19,040 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:19,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:19,040 INFO L82 PathProgramCache]: Analyzing trace with hash -18701875, now seen corresponding path program 257 times [2021-05-03 14:08:19,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:19,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549492588] [2021-05-03 14:08:19,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:19,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549492588] [2021-05-03 14:08:19,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578600504] [2021-05-03 14:08:19,145 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 [2021-05-03 14:08:19,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:08:19,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:19,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:19,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:19,229 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:19,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:19,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-03 14:08:19,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080682523] [2021-05-03 14:08:19,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:08:19,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:19,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:08:19,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:08:19,230 INFO L87 Difference]: Start difference. First operand 87528 states and 266379 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) [2021-05-03 14:08:20,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:20,001 INFO L93 Difference]: Finished difference Result 89118 states and 270691 transitions. [2021-05-03 14:08:20,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 14:08:20,002 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 [2021-05-03 14:08:20,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:20,163 INFO L225 Difference]: With dead ends: 89118 [2021-05-03 14:08:20,163 INFO L226 Difference]: Without dead ends: 89118 [2021-05-03 14:08:20,163 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 452.1ms TimeCoverageRelationStatistics Valid=807, Invalid=1643, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 14:08:20,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89118 states. [2021-05-03 14:08:21,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89118 to 87510. [2021-05-03 14:08:22,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87510 states, 87509 states have (on average 3.043401250157127) internal successors, (266325), 87509 states have internal predecessors, (266325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:22,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87510 states to 87510 states and 266325 transitions. [2021-05-03 14:08:22,300 INFO L78 Accepts]: Start accepts. Automaton has 87510 states and 266325 transitions. Word has length 22 [2021-05-03 14:08:22,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:22,300 INFO L480 AbstractCegarLoop]: Abstraction has 87510 states and 266325 transitions. [2021-05-03 14:08:22,300 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) [2021-05-03 14:08:22,300 INFO L276 IsEmpty]: Start isEmpty. Operand 87510 states and 266325 transitions. [2021-05-03 14:08:22,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:22,326 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:22,326 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:22,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10554 [2021-05-03 14:08:22,541 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:22,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:22,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1303353945, now seen corresponding path program 258 times [2021-05-03 14:08:22,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:22,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753745221] [2021-05-03 14:08:22,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:22,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:22,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753745221] [2021-05-03 14:08:22,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159021039] [2021-05-03 14:08:22,643 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 [2021-05-03 14:08:22,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-03 14:08:22,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:22,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:22,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:22,709 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:22,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:22,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-05-03 14:08:22,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174610055] [2021-05-03 14:08:22,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:08:22,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:22,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:08:22,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:08:22,709 INFO L87 Difference]: Start difference. First operand 87510 states and 266325 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) [2021-05-03 14:08:23,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:23,331 INFO L93 Difference]: Finished difference Result 87690 states and 266541 transitions. [2021-05-03 14:08:23,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:08:23,332 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 [2021-05-03 14:08:23,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:23,511 INFO L225 Difference]: With dead ends: 87690 [2021-05-03 14:08:23,511 INFO L226 Difference]: Without dead ends: 87686 [2021-05-03 14:08:23,511 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 248.0ms TimeCoverageRelationStatistics Valid=313, Invalid=617, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:08:23,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87686 states. [2021-05-03 14:08:25,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87686 to 87508. [2021-05-03 14:08:25,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87508 states, 87507 states have (on average 3.0434250974207777) internal successors, (266321), 87507 states have internal predecessors, (266321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:25,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87508 states to 87508 states and 266321 transitions. [2021-05-03 14:08:25,785 INFO L78 Accepts]: Start accepts. Automaton has 87508 states and 266321 transitions. Word has length 22 [2021-05-03 14:08:25,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:25,785 INFO L480 AbstractCegarLoop]: Abstraction has 87508 states and 266321 transitions. [2021-05-03 14:08:25,785 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) [2021-05-03 14:08:25,785 INFO L276 IsEmpty]: Start isEmpty. Operand 87508 states and 266321 transitions. [2021-05-03 14:08:25,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:25,815 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:25,815 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:26,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10555,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:26,030 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:26,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:26,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1535013223, now seen corresponding path program 259 times [2021-05-03 14:08:26,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:26,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772848780] [2021-05-03 14:08:26,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:26,132 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:26,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772848780] [2021-05-03 14:08:26,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93478314] [2021-05-03 14:08:26,133 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 [2021-05-03 14:08:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:26,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:26,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:26,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:26,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-05-03 14:08:26,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403874007] [2021-05-03 14:08:26,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:08:26,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:26,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:08:26,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:08:26,236 INFO L87 Difference]: Start difference. First operand 87508 states and 266321 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) [2021-05-03 14:08:27,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:27,025 INFO L93 Difference]: Finished difference Result 97092 states and 294572 transitions. [2021-05-03 14:08:27,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 14:08:27,037 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 [2021-05-03 14:08:27,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:27,245 INFO L225 Difference]: With dead ends: 97092 [2021-05-03 14:08:27,245 INFO L226 Difference]: Without dead ends: 97092 [2021-05-03 14:08:27,245 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 443.6ms TimeCoverageRelationStatistics Valid=799, Invalid=1651, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 14:08:27,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97092 states. [2021-05-03 14:08:29,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97092 to 93336. [2021-05-03 14:08:29,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93336 states, 93335 states have (on average 3.0407457009696257) internal successors, (283808), 93335 states have internal predecessors, (283808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:29,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93336 states to 93336 states and 283808 transitions. [2021-05-03 14:08:29,693 INFO L78 Accepts]: Start accepts. Automaton has 93336 states and 283808 transitions. Word has length 22 [2021-05-03 14:08:29,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:29,693 INFO L480 AbstractCegarLoop]: Abstraction has 93336 states and 283808 transitions. [2021-05-03 14:08:29,693 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) [2021-05-03 14:08:29,693 INFO L276 IsEmpty]: Start isEmpty. Operand 93336 states and 283808 transitions. [2021-05-03 14:08:29,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:29,727 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:29,727 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:29,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10556 [2021-05-03 14:08:29,946 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:29,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:29,947 INFO L82 PathProgramCache]: Analyzing trace with hash -224277439, now seen corresponding path program 260 times [2021-05-03 14:08:29,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:29,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851239615] [2021-05-03 14:08:29,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:29,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:30,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851239615] [2021-05-03 14:08:30,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246674562] [2021-05-03 14:08:30,057 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 [2021-05-03 14:08:30,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:08:30,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:30,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:30,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:30,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:30,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-05-03 14:08:30,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449022840] [2021-05-03 14:08:30,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:08:30,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:30,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:08:30,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:08:30,260 INFO L87 Difference]: Start difference. First operand 93336 states and 283808 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) [2021-05-03 14:08:31,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:31,039 INFO L93 Difference]: Finished difference Result 97575 states and 296111 transitions. [2021-05-03 14:08:31,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 14:08:31,039 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 [2021-05-03 14:08:31,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:31,763 INFO L225 Difference]: With dead ends: 97575 [2021-05-03 14:08:31,763 INFO L226 Difference]: Without dead ends: 97575 [2021-05-03 14:08:31,763 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 423.6ms TimeCoverageRelationStatistics Valid=669, Invalid=1401, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 14:08:31,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97575 states. [2021-05-03 14:08:33,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97575 to 96000. [2021-05-03 14:08:33,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96000 states, 95999 states have (on average 3.0396149959895418) internal successors, (291800), 95999 states have internal predecessors, (291800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:33,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96000 states to 96000 states and 291800 transitions. [2021-05-03 14:08:33,640 INFO L78 Accepts]: Start accepts. Automaton has 96000 states and 291800 transitions. Word has length 22 [2021-05-03 14:08:33,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:33,640 INFO L480 AbstractCegarLoop]: Abstraction has 96000 states and 291800 transitions. [2021-05-03 14:08:33,640 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) [2021-05-03 14:08:33,640 INFO L276 IsEmpty]: Start isEmpty. Operand 96000 states and 291800 transitions. [2021-05-03 14:08:33,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:33,674 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:33,674 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:33,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10557,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:33,889 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:33,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:33,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1520086567, now seen corresponding path program 261 times [2021-05-03 14:08:33,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:33,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624978251] [2021-05-03 14:08:33,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:33,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:34,004 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:34,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624978251] [2021-05-03 14:08:34,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841294797] [2021-05-03 14:08:34,004 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 [2021-05-03 14:08:34,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:08:34,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:34,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:34,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:34,120 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:34,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:34,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-05-03 14:08:34,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012535153] [2021-05-03 14:08:34,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:08:34,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:34,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:08:34,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:08:34,121 INFO L87 Difference]: Start difference. First operand 96000 states and 291800 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) [2021-05-03 14:08:35,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:35,224 INFO L93 Difference]: Finished difference Result 98465 states and 298743 transitions. [2021-05-03 14:08:35,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 14:08:35,225 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 [2021-05-03 14:08:35,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:35,427 INFO L225 Difference]: With dead ends: 98465 [2021-05-03 14:08:35,427 INFO L226 Difference]: Without dead ends: 98465 [2021-05-03 14:08:35,427 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 413.0ms TimeCoverageRelationStatistics Valid=691, Invalid=1471, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 14:08:35,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98465 states. [2021-05-03 14:08:37,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98465 to 96553. [2021-05-03 14:08:37,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96553 states, 96552 states have (on average 3.0393881017482807) internal successors, (293459), 96552 states have internal predecessors, (293459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:37,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96553 states to 96553 states and 293459 transitions. [2021-05-03 14:08:37,428 INFO L78 Accepts]: Start accepts. Automaton has 96553 states and 293459 transitions. Word has length 22 [2021-05-03 14:08:37,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:37,428 INFO L480 AbstractCegarLoop]: Abstraction has 96553 states and 293459 transitions. [2021-05-03 14:08:37,428 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) [2021-05-03 14:08:37,428 INFO L276 IsEmpty]: Start isEmpty. Operand 96553 states and 293459 transitions. [2021-05-03 14:08:37,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:37,878 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:37,878 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:38,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10558,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:38,079 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:38,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:38,079 INFO L82 PathProgramCache]: Analyzing trace with hash -761242551, now seen corresponding path program 262 times [2021-05-03 14:08:38,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:38,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994243538] [2021-05-03 14:08:38,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:38,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994243538] [2021-05-03 14:08:38,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604903436] [2021-05-03 14:08:38,188 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) [2021-05-03 14:08:38,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:08:38,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:38,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:38,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:38,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:38,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 16 [2021-05-03 14:08:38,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530778407] [2021-05-03 14:08:38,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:08:38,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:38,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:08:38,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:08:38,259 INFO L87 Difference]: Start difference. First operand 96553 states and 293459 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) [2021-05-03 14:08:38,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:38,821 INFO L93 Difference]: Finished difference Result 96926 states and 294310 transitions. [2021-05-03 14:08:38,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:08:38,821 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 [2021-05-03 14:08:38,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:39,033 INFO L225 Difference]: With dead ends: 96926 [2021-05-03 14:08:39,033 INFO L226 Difference]: Without dead ends: 96924 [2021-05-03 14:08:39,034 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 211.6ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:08:39,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96924 states. [2021-05-03 14:08:41,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96924 to 96774. [2021-05-03 14:08:41,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96774 states, 96773 states have (on average 3.0395564878633503) internal successors, (294147), 96773 states have internal predecessors, (294147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:41,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96774 states to 96774 states and 294147 transitions. [2021-05-03 14:08:41,351 INFO L78 Accepts]: Start accepts. Automaton has 96774 states and 294147 transitions. Word has length 22 [2021-05-03 14:08:41,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:41,351 INFO L480 AbstractCegarLoop]: Abstraction has 96774 states and 294147 transitions. [2021-05-03 14:08:41,351 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) [2021-05-03 14:08:41,351 INFO L276 IsEmpty]: Start isEmpty. Operand 96774 states and 294147 transitions. [2021-05-03 14:08:41,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:41,385 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:41,385 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:41,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10559 [2021-05-03 14:08:41,595 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:41,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:41,595 INFO L82 PathProgramCache]: Analyzing trace with hash 956506509, now seen corresponding path program 263 times [2021-05-03 14:08:41,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:41,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122157977] [2021-05-03 14:08:41,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:41,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:41,697 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:41,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122157977] [2021-05-03 14:08:41,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442182208] [2021-05-03 14:08:41,697 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 [2021-05-03 14:08:41,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:08:41,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:41,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:41,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:41,794 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:08:41,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:41,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 16 [2021-05-03 14:08:41,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258908246] [2021-05-03 14:08:41,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:08:41,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:41,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:08:41,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:08:41,794 INFO L87 Difference]: Start difference. First operand 96774 states and 294147 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) [2021-05-03 14:08:42,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:42,330 INFO L93 Difference]: Finished difference Result 98650 states and 299438 transitions. [2021-05-03 14:08:42,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:08:42,332 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 [2021-05-03 14:08:42,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:42,555 INFO L225 Difference]: With dead ends: 98650 [2021-05-03 14:08:42,555 INFO L226 Difference]: Without dead ends: 98650 [2021-05-03 14:08:42,556 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 204.2ms TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:08:42,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98650 states. [2021-05-03 14:08:44,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98650 to 96776. [2021-05-03 14:08:44,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96776 states, 96775 states have (on average 3.0395556703694138) internal successors, (294153), 96775 states have internal predecessors, (294153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:44,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96776 states to 96776 states and 294153 transitions. [2021-05-03 14:08:44,988 INFO L78 Accepts]: Start accepts. Automaton has 96776 states and 294153 transitions. Word has length 22 [2021-05-03 14:08:44,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:44,988 INFO L480 AbstractCegarLoop]: Abstraction has 96776 states and 294153 transitions. [2021-05-03 14:08:44,988 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) [2021-05-03 14:08:44,988 INFO L276 IsEmpty]: Start isEmpty. Operand 96776 states and 294153 transitions. [2021-05-03 14:08:45,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:45,020 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:45,021 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:45,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10560,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:45,235 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:45,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:45,235 INFO L82 PathProgramCache]: Analyzing trace with hash -772540825, now seen corresponding path program 264 times [2021-05-03 14:08:45,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:45,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997619823] [2021-05-03 14:08:45,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:45,338 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:45,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997619823] [2021-05-03 14:08:45,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726306277] [2021-05-03 14:08:45,339 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 [2021-05-03 14:08:45,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:08:45,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:45,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:45,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:45,431 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:45,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:45,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2021-05-03 14:08:45,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016318623] [2021-05-03 14:08:45,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:08:45,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:45,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:08:45,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:08:45,432 INFO L87 Difference]: Start difference. First operand 96776 states and 294153 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) [2021-05-03 14:08:46,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:46,042 INFO L93 Difference]: Finished difference Result 100367 states and 304534 transitions. [2021-05-03 14:08:46,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:08:46,052 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 22 [2021-05-03 14:08:46,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:46,292 INFO L225 Difference]: With dead ends: 100367 [2021-05-03 14:08:46,292 INFO L226 Difference]: Without dead ends: 100367 [2021-05-03 14:08:46,292 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 265.4ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:08:46,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100367 states. [2021-05-03 14:08:48,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100367 to 96786. [2021-05-03 14:08:48,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96786 states, 96785 states have (on average 3.0395515834065194) internal successors, (294183), 96785 states have internal predecessors, (294183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:48,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96786 states to 96786 states and 294183 transitions. [2021-05-03 14:08:48,687 INFO L78 Accepts]: Start accepts. Automaton has 96786 states and 294183 transitions. Word has length 22 [2021-05-03 14:08:48,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:48,687 INFO L480 AbstractCegarLoop]: Abstraction has 96786 states and 294183 transitions. [2021-05-03 14:08:48,687 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) [2021-05-03 14:08:48,687 INFO L276 IsEmpty]: Start isEmpty. Operand 96786 states and 294183 transitions. [2021-05-03 14:08:48,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:48,719 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:48,719 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:48,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10561 [2021-05-03 14:08:48,929 INFO L428 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:48,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:48,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1461566669, now seen corresponding path program 265 times [2021-05-03 14:08:48,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:48,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799352738] [2021-05-03 14:08:48,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:49,028 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:49,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799352738] [2021-05-03 14:08:49,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002272745] [2021-05-03 14:08:49,028 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) [2021-05-03 14:08:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:49,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:49,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:49,120 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:49,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:49,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2021-05-03 14:08:49,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187283222] [2021-05-03 14:08:49,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:08:49,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:49,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:08:49,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:08:49,121 INFO L87 Difference]: Start difference. First operand 96786 states and 294183 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) [2021-05-03 14:08:49,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:49,825 INFO L93 Difference]: Finished difference Result 103852 states and 314875 transitions. [2021-05-03 14:08:49,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 14:08:49,826 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 22 [2021-05-03 14:08:49,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:50,694 INFO L225 Difference]: With dead ends: 103852 [2021-05-03 14:08:50,694 INFO L226 Difference]: Without dead ends: 103852 [2021-05-03 14:08:50,694 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 299.0ms TimeCoverageRelationStatistics Valid=443, Invalid=963, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 14:08:50,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103852 states. [2021-05-03 14:08:52,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103852 to 100467. [2021-05-03 14:08:52,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100467 states, 100466 states have (on average 3.0390181753030876) internal successors, (305318), 100466 states have internal predecessors, (305318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:53,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100467 states to 100467 states and 305318 transitions. [2021-05-03 14:08:53,016 INFO L78 Accepts]: Start accepts. Automaton has 100467 states and 305318 transitions. Word has length 22 [2021-05-03 14:08:53,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:53,016 INFO L480 AbstractCegarLoop]: Abstraction has 100467 states and 305318 transitions. [2021-05-03 14:08:53,016 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) [2021-05-03 14:08:53,016 INFO L276 IsEmpty]: Start isEmpty. Operand 100467 states and 305318 transitions. [2021-05-03 14:08:53,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:53,070 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:53,070 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:53,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10562 [2021-05-03 14:08:53,289 INFO L428 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:53,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:53,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1999422247, now seen corresponding path program 266 times [2021-05-03 14:08:53,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:53,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928108287] [2021-05-03 14:08:53,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:53,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928108287] [2021-05-03 14:08:53,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782225519] [2021-05-03 14:08:53,429 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 [2021-05-03 14:08:53,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:08:53,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:53,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:53,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:53,550 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:08:53,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:53,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2021-05-03 14:08:53,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333803503] [2021-05-03 14:08:53,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:08:53,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:53,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:08:53,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:08:53,551 INFO L87 Difference]: Start difference. First operand 100467 states and 305318 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) [2021-05-03 14:08:54,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:54,341 INFO L93 Difference]: Finished difference Result 117624 states and 356391 transitions. [2021-05-03 14:08:54,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 14:08:54,341 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 22 [2021-05-03 14:08:54,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:54,608 INFO L225 Difference]: With dead ends: 117624 [2021-05-03 14:08:54,608 INFO L226 Difference]: Without dead ends: 117624 [2021-05-03 14:08:54,608 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 380.8ms TimeCoverageRelationStatistics Valid=533, Invalid=1189, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 14:08:54,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117624 states. [2021-05-03 14:08:57,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117624 to 114603. [2021-05-03 14:08:57,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114603 states, 114602 states have (on average 3.0346416292909373) internal successors, (347776), 114602 states have internal predecessors, (347776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:57,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114603 states to 114603 states and 347776 transitions. [2021-05-03 14:08:57,453 INFO L78 Accepts]: Start accepts. Automaton has 114603 states and 347776 transitions. Word has length 22 [2021-05-03 14:08:57,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:57,453 INFO L480 AbstractCegarLoop]: Abstraction has 114603 states and 347776 transitions. [2021-05-03 14:08:57,453 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) [2021-05-03 14:08:57,453 INFO L276 IsEmpty]: Start isEmpty. Operand 114603 states and 347776 transitions. [2021-05-03 14:08:57,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:57,490 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:57,490 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:57,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10563 [2021-05-03 14:08:57,705 INFO L428 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:57,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:57,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1493075981, now seen corresponding path program 267 times [2021-05-03 14:08:57,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:57,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138969755] [2021-05-03 14:08:57,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:57,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:57,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138969755] [2021-05-03 14:08:57,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300152364] [2021-05-03 14:08:57,806 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 [2021-05-03 14:08:57,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:08:57,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:57,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:57,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:57,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:57,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-05-03 14:08:57,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74672192] [2021-05-03 14:08:57,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:08:57,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:57,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:08:57,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:08:57,918 INFO L87 Difference]: Start difference. First operand 114603 states and 347776 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-05-03 14:08:59,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:59,071 INFO L93 Difference]: Finished difference Result 117101 states and 354865 transitions. [2021-05-03 14:08:59,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 14:08:59,072 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 [2021-05-03 14:08:59,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:59,334 INFO L225 Difference]: With dead ends: 117101 [2021-05-03 14:08:59,335 INFO L226 Difference]: Without dead ends: 117101 [2021-05-03 14:08:59,335 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 364.4ms TimeCoverageRelationStatistics Valid=552, Invalid=1254, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 14:08:59,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117101 states. [2021-05-03 14:09:01,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117101 to 114723. [2021-05-03 14:09:01,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114723 states, 114722 states have (on average 3.034596677184847) internal successors, (348135), 114722 states have internal predecessors, (348135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:02,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114723 states to 114723 states and 348135 transitions. [2021-05-03 14:09:02,061 INFO L78 Accepts]: Start accepts. Automaton has 114723 states and 348135 transitions. Word has length 22 [2021-05-03 14:09:02,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:02,061 INFO L480 AbstractCegarLoop]: Abstraction has 114723 states and 348135 transitions. [2021-05-03 14:09:02,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-05-03 14:09:02,061 INFO L276 IsEmpty]: Start isEmpty. Operand 114723 states and 348135 transitions. [2021-05-03 14:09:02,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:02,095 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:02,095 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:02,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10564 [2021-05-03 14:09:02,310 INFO L428 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:02,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:02,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1318756377, now seen corresponding path program 268 times [2021-05-03 14:09:02,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:02,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945783517] [2021-05-03 14:09:02,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:02,414 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:02,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945783517] [2021-05-03 14:09:02,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933891934] [2021-05-03 14:09:02,414 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 [2021-05-03 14:09:02,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:02,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:02,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:02,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:02,549 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:02,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:02,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-05-03 14:09:02,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117442516] [2021-05-03 14:09:02,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:09:02,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:02,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:09:02,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:09:02,550 INFO L87 Difference]: Start difference. First operand 114723 states and 348135 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-05-03 14:09:03,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:03,339 INFO L93 Difference]: Finished difference Result 129613 states and 392477 transitions. [2021-05-03 14:09:03,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:09:03,340 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 [2021-05-03 14:09:03,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:04,028 INFO L225 Difference]: With dead ends: 129613 [2021-05-03 14:09:04,028 INFO L226 Difference]: Without dead ends: 129613 [2021-05-03 14:09:04,028 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 339.9ms TimeCoverageRelationStatistics Valid=441, Invalid=1041, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 14:09:04,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129613 states. [2021-05-03 14:09:06,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129613 to 128238. [2021-05-03 14:09:06,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128238 states, 128237 states have (on average 3.0310128901954974) internal successors, (388688), 128237 states have internal predecessors, (388688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:06,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128238 states to 128238 states and 388688 transitions. [2021-05-03 14:09:06,767 INFO L78 Accepts]: Start accepts. Automaton has 128238 states and 388688 transitions. Word has length 22 [2021-05-03 14:09:06,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:06,767 INFO L480 AbstractCegarLoop]: Abstraction has 128238 states and 388688 transitions. [2021-05-03 14:09:06,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-05-03 14:09:06,767 INFO L276 IsEmpty]: Start isEmpty. Operand 128238 states and 388688 transitions. [2021-05-03 14:09:06,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:06,807 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:06,807 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:07,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10565,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:07,021 INFO L428 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:07,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:07,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1708753741, now seen corresponding path program 269 times [2021-05-03 14:09:07,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:07,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300631434] [2021-05-03 14:09:07,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:07,125 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:07,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300631434] [2021-05-03 14:09:07,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101577470] [2021-05-03 14:09:07,126 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 [2021-05-03 14:09:07,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:09:07,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:07,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:07,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:07,225 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:07,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:07,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-05-03 14:09:07,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839425580] [2021-05-03 14:09:07,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:09:07,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:07,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:09:07,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:09:07,226 INFO L87 Difference]: Start difference. First operand 128238 states and 388688 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-05-03 14:09:07,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:07,948 INFO L93 Difference]: Finished difference Result 131498 states and 398224 transitions. [2021-05-03 14:09:07,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:09:07,949 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 [2021-05-03 14:09:07,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:08,253 INFO L225 Difference]: With dead ends: 131498 [2021-05-03 14:09:08,253 INFO L226 Difference]: Without dead ends: 131498 [2021-05-03 14:09:08,254 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 316.4ms TimeCoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 14:09:08,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131498 states. [2021-05-03 14:09:11,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131498 to 130639. [2021-05-03 14:09:11,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130639 states, 130638 states have (on average 3.0304429032900075) internal successors, (395891), 130638 states have internal predecessors, (395891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:11,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130639 states to 130639 states and 395891 transitions. [2021-05-03 14:09:11,599 INFO L78 Accepts]: Start accepts. Automaton has 130639 states and 395891 transitions. Word has length 22 [2021-05-03 14:09:11,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:11,599 INFO L480 AbstractCegarLoop]: Abstraction has 130639 states and 395891 transitions. [2021-05-03 14:09:11,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-05-03 14:09:11,599 INFO L276 IsEmpty]: Start isEmpty. Operand 130639 states and 395891 transitions. [2021-05-03 14:09:11,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:11,633 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:11,633 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:11,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10566 [2021-05-03 14:09:11,848 INFO L428 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:11,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:11,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1072286887, now seen corresponding path program 270 times [2021-05-03 14:09:11,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:11,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870291717] [2021-05-03 14:09:11,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:11,979 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:11,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870291717] [2021-05-03 14:09:11,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640699986] [2021-05-03 14:09:11,979 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 [2021-05-03 14:09:12,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:09:12,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:12,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:12,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:12,088 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:12,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:12,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2021-05-03 14:09:12,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825067729] [2021-05-03 14:09:12,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:09:12,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:12,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:09:12,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:09:12,089 INFO L87 Difference]: Start difference. First operand 130639 states and 395891 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) [2021-05-03 14:09:12,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:12,989 INFO L93 Difference]: Finished difference Result 132410 states and 400904 transitions. [2021-05-03 14:09:12,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:09:12,990 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 [2021-05-03 14:09:12,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:13,286 INFO L225 Difference]: With dead ends: 132410 [2021-05-03 14:09:13,286 INFO L226 Difference]: Without dead ends: 132410 [2021-05-03 14:09:13,286 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 427.9ms TimeCoverageRelationStatistics Valid=552, Invalid=1254, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 14:09:13,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132410 states. [2021-05-03 14:09:15,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132410 to 130698. [2021-05-03 14:09:16,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130698 states, 130697 states have (on average 3.030429160577519) internal successors, (396068), 130697 states have internal predecessors, (396068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:16,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130698 states to 130698 states and 396068 transitions. [2021-05-03 14:09:16,917 INFO L78 Accepts]: Start accepts. Automaton has 130698 states and 396068 transitions. Word has length 22 [2021-05-03 14:09:16,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:16,917 INFO L480 AbstractCegarLoop]: Abstraction has 130698 states and 396068 transitions. [2021-05-03 14:09:16,917 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) [2021-05-03 14:09:16,917 INFO L276 IsEmpty]: Start isEmpty. Operand 130698 states and 396068 transitions. [2021-05-03 14:09:16,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:16,961 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:16,961 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:17,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10567,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:17,175 INFO L428 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:17,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:17,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1478316403, now seen corresponding path program 271 times [2021-05-03 14:09:17,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:17,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729679956] [2021-05-03 14:09:17,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:17,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:17,288 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:17,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729679956] [2021-05-03 14:09:17,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100217748] [2021-05-03 14:09:17,289 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) [2021-05-03 14:09:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:17,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:17,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:17,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:17,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2021-05-03 14:09:17,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966367230] [2021-05-03 14:09:17,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:09:17,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:17,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:09:17,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:09:17,396 INFO L87 Difference]: Start difference. First operand 130698 states and 396068 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) [2021-05-03 14:09:18,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:18,179 INFO L93 Difference]: Finished difference Result 132757 states and 401917 transitions. [2021-05-03 14:09:18,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:09:18,180 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 [2021-05-03 14:09:18,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:18,495 INFO L225 Difference]: With dead ends: 132757 [2021-05-03 14:09:18,495 INFO L226 Difference]: Without dead ends: 132757 [2021-05-03 14:09:18,495 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 364.1ms TimeCoverageRelationStatistics Valid=507, Invalid=1215, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 14:09:18,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132757 states. [2021-05-03 14:09:21,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132757 to 131013. [2021-05-03 14:09:21,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131013 states, 131012 states have (on average 3.0303559979238543) internal successors, (397013), 131012 states have internal predecessors, (397013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:22,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131013 states to 131013 states and 397013 transitions. [2021-05-03 14:09:22,101 INFO L78 Accepts]: Start accepts. Automaton has 131013 states and 397013 transitions. Word has length 22 [2021-05-03 14:09:22,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:22,101 INFO L480 AbstractCegarLoop]: Abstraction has 131013 states and 397013 transitions. [2021-05-03 14:09:22,101 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) [2021-05-03 14:09:22,101 INFO L276 IsEmpty]: Start isEmpty. Operand 131013 states and 397013 transitions. [2021-05-03 14:09:22,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:22,132 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:22,132 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:22,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10568 [2021-05-03 14:09:22,333 INFO L428 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:22,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:22,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1057360231, now seen corresponding path program 272 times [2021-05-03 14:09:22,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:22,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709239885] [2021-05-03 14:09:22,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:22,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:22,448 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:22,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709239885] [2021-05-03 14:09:22,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46249990] [2021-05-03 14:09:22,449 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 [2021-05-03 14:09:22,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:22,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:22,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:22,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:22,560 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:22,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:22,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2021-05-03 14:09:22,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226738264] [2021-05-03 14:09:22,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:09:22,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:22,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:09:22,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:09:22,560 INFO L87 Difference]: Start difference. First operand 131013 states and 397013 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) [2021-05-03 14:09:23,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:23,462 INFO L93 Difference]: Finished difference Result 135540 states and 410128 transitions. [2021-05-03 14:09:23,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 14:09:23,465 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 [2021-05-03 14:09:23,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:23,770 INFO L225 Difference]: With dead ends: 135540 [2021-05-03 14:09:23,770 INFO L226 Difference]: Without dead ends: 135540 [2021-05-03 14:09:23,770 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 474.4ms TimeCoverageRelationStatistics Valid=851, Invalid=1905, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 14:09:23,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135540 states. [2021-05-03 14:09:26,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135540 to 131079. [2021-05-03 14:09:26,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131079 states, 131078 states have (on average 3.0303407131631546) internal successors, (397211), 131078 states have internal predecessors, (397211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:27,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131079 states to 131079 states and 397211 transitions. [2021-05-03 14:09:27,000 INFO L78 Accepts]: Start accepts. Automaton has 131079 states and 397211 transitions. Word has length 22 [2021-05-03 14:09:27,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:27,001 INFO L480 AbstractCegarLoop]: Abstraction has 131079 states and 397211 transitions. [2021-05-03 14:09:27,001 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) [2021-05-03 14:09:27,001 INFO L276 IsEmpty]: Start isEmpty. Operand 131079 states and 397211 transitions. [2021-05-03 14:09:27,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:09:27,044 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:27,044 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:27,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10569,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:27,245 INFO L428 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:27,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:27,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1384664402, now seen corresponding path program 273 times [2021-05-03 14:09:27,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:27,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658806404] [2021-05-03 14:09:27,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:27,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:27,357 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 55 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:27,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658806404] [2021-05-03 14:09:27,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115831813] [2021-05-03 14:09:27,357 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 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 [2021-05-03 14:09:27,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:09:27,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:27,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:09:27,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 66 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:27,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:27,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-05-03 14:09:27,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076736944] [2021-05-03 14:09:27,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:09:27,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:27,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:09:27,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:09:27,437 INFO L87 Difference]: Start difference. First operand 131079 states and 397211 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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) [2021-05-03 14:09:28,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:28,066 INFO L93 Difference]: Finished difference Result 131316 states and 397574 transitions. [2021-05-03 14:09:28,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:09:28,066 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 24 [2021-05-03 14:09:28,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:28,338 INFO L225 Difference]: With dead ends: 131316 [2021-05-03 14:09:28,338 INFO L226 Difference]: Without dead ends: 131310 [2021-05-03 14:09:28,338 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 205.5ms TimeCoverageRelationStatistics Valid=342, Invalid=650, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:09:28,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131310 states. [2021-05-03 14:09:30,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131310 to 131104. [2021-05-03 14:09:30,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131104 states, 131103 states have (on average 3.0301594929177824) internal successors, (397263), 131103 states have internal predecessors, (397263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:31,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131104 states to 131104 states and 397263 transitions. [2021-05-03 14:09:31,452 INFO L78 Accepts]: Start accepts. Automaton has 131104 states and 397263 transitions. Word has length 24 [2021-05-03 14:09:31,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:31,452 INFO L480 AbstractCegarLoop]: Abstraction has 131104 states and 397263 transitions. [2021-05-03 14:09:31,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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) [2021-05-03 14:09:31,452 INFO L276 IsEmpty]: Start isEmpty. Operand 131104 states and 397263 transitions. [2021-05-03 14:09:31,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:09:31,497 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:31,497 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:31,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10570,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:31,698 INFO L428 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:31,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:31,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1036551628, now seen corresponding path program 274 times [2021-05-03 14:09:31,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:31,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602030377] [2021-05-03 14:09:31,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:31,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:31,782 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 57 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:31,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602030377] [2021-05-03 14:09:31,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917792412] [2021-05-03 14:09:31,782 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 [2021-05-03 14:09:31,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:31,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:31,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 14:09:31,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:31,897 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 77 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:31,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:31,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 19 [2021-05-03 14:09:31,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755089855] [2021-05-03 14:09:31,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:09:31,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:31,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:09:31,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:09:31,898 INFO L87 Difference]: Start difference. First operand 131104 states and 397263 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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) [2021-05-03 14:09:32,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:32,510 INFO L93 Difference]: Finished difference Result 131229 states and 397402 transitions. [2021-05-03 14:09:32,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:09:32,510 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 24 [2021-05-03 14:09:32,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:32,758 INFO L225 Difference]: With dead ends: 131229 [2021-05-03 14:09:32,758 INFO L226 Difference]: Without dead ends: 131229 [2021-05-03 14:09:32,758 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 190.8ms TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:09:32,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131229 states. [2021-05-03 14:09:34,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131229 to 131082. [2021-05-03 14:09:35,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131082 states, 131081 states have (on average 3.0302637300600392) internal successors, (397210), 131081 states have internal predecessors, (397210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:35,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131082 states to 131082 states and 397210 transitions. [2021-05-03 14:09:35,463 INFO L78 Accepts]: Start accepts. Automaton has 131082 states and 397210 transitions. Word has length 24 [2021-05-03 14:09:35,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:35,463 INFO L480 AbstractCegarLoop]: Abstraction has 131082 states and 397210 transitions. [2021-05-03 14:09:35,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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) [2021-05-03 14:09:35,463 INFO L276 IsEmpty]: Start isEmpty. Operand 131082 states and 397210 transitions. [2021-05-03 14:09:35,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:09:35,508 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:35,508 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:35,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10571,276 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:35,709 INFO L428 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:35,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:35,709 INFO L82 PathProgramCache]: Analyzing trace with hash -757952152, now seen corresponding path program 275 times [2021-05-03 14:09:35,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:35,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772847717] [2021-05-03 14:09:35,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:35,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:36,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772847717] [2021-05-03 14:09:36,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170715049] [2021-05-03 14:09:36,140 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 [2021-05-03 14:09:36,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:09:36,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:36,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:36,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 75 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:09:36,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:36,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 19 [2021-05-03 14:09:36,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345223165] [2021-05-03 14:09:36,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:09:36,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:36,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:09:36,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:09:36,313 INFO L87 Difference]: Start difference. First operand 131082 states and 397210 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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) [2021-05-03 14:09:36,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:36,897 INFO L93 Difference]: Finished difference Result 131237 states and 397440 transitions. [2021-05-03 14:09:36,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:09:36,897 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 24 [2021-05-03 14:09:36,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:37,179 INFO L225 Difference]: With dead ends: 131237 [2021-05-03 14:09:37,179 INFO L226 Difference]: Without dead ends: 131237 [2021-05-03 14:09:37,179 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 539.0ms TimeCoverageRelationStatistics Valid=252, Invalid=618, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:09:37,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131237 states. [2021-05-03 14:09:39,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131237 to 131093. [2021-05-03 14:09:39,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131093 states, 131092 states have (on average 3.0302077930003355) internal successors, (397236), 131092 states have internal predecessors, (397236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:39,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131093 states to 131093 states and 397236 transitions. [2021-05-03 14:09:39,810 INFO L78 Accepts]: Start accepts. Automaton has 131093 states and 397236 transitions. Word has length 24 [2021-05-03 14:09:39,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:39,810 INFO L480 AbstractCegarLoop]: Abstraction has 131093 states and 397236 transitions. [2021-05-03 14:09:39,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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) [2021-05-03 14:09:39,810 INFO L276 IsEmpty]: Start isEmpty. Operand 131093 states and 397236 transitions. [2021-05-03 14:09:39,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:09:39,856 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:39,856 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:40,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10572 [2021-05-03 14:09:40,057 INFO L428 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:40,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:40,057 INFO L82 PathProgramCache]: Analyzing trace with hash -711302988, now seen corresponding path program 276 times [2021-05-03 14:09:40,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:40,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757786254] [2021-05-03 14:09:40,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:40,141 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:40,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757786254] [2021-05-03 14:09:40,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104136033] [2021-05-03 14:09:40,142 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 [2021-05-03 14:09:40,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:09:40,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:40,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:09:40,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:40,211 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 51 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:40,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:40,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:09:40,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226792349] [2021-05-03 14:09:40,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:09:40,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:40,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:09:40,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:09:40,212 INFO L87 Difference]: Start difference. First operand 131093 states and 397236 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) [2021-05-03 14:09:41,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:41,167 INFO L93 Difference]: Finished difference Result 131154 states and 397359 transitions. [2021-05-03 14:09:41,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:09:41,167 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 24 [2021-05-03 14:09:41,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:41,431 INFO L225 Difference]: With dead ends: 131154 [2021-05-03 14:09:41,432 INFO L226 Difference]: Without dead ends: 131153 [2021-05-03 14:09:41,432 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 139.5ms TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:09:41,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131153 states. [2021-05-03 14:09:43,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131153 to 131093. [2021-05-03 14:09:43,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131093 states, 131092 states have (on average 3.030184908308669) internal successors, (397233), 131092 states have internal predecessors, (397233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:43,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131093 states to 131093 states and 397233 transitions. [2021-05-03 14:09:43,978 INFO L78 Accepts]: Start accepts. Automaton has 131093 states and 397233 transitions. Word has length 24 [2021-05-03 14:09:43,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:43,978 INFO L480 AbstractCegarLoop]: Abstraction has 131093 states and 397233 transitions. [2021-05-03 14:09:43,978 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) [2021-05-03 14:09:43,978 INFO L276 IsEmpty]: Start isEmpty. Operand 131093 states and 397233 transitions. [2021-05-03 14:09:44,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:09:44,017 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:44,017 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:44,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10573 [2021-05-03 14:09:44,217 INFO L428 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:44,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:44,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1157400778, now seen corresponding path program 277 times [2021-05-03 14:09:44,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:44,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524349954] [2021-05-03 14:09:44,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:44,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:44,286 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:09:44,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524349954] [2021-05-03 14:09:44,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236848979] [2021-05-03 14:09:44,286 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 [2021-05-03 14:09:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:44,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:09:44,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:44,357 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:09:44,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:44,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:09:44,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086770932] [2021-05-03 14:09:44,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:09:44,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:44,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:09:44,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:09:44,358 INFO L87 Difference]: Start difference. First operand 131093 states and 397233 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) [2021-05-03 14:09:45,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:45,346 INFO L93 Difference]: Finished difference Result 131454 states and 397901 transitions. [2021-05-03 14:09:45,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:09:45,347 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 24 [2021-05-03 14:09:45,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:45,628 INFO L225 Difference]: With dead ends: 131454 [2021-05-03 14:09:45,629 INFO L226 Difference]: Without dead ends: 131452 [2021-05-03 14:09:45,629 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=150, Invalid=230, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:09:45,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131452 states. [2021-05-03 14:09:47,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131452 to 131181. [2021-05-03 14:09:47,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131181 states, 131180 states have (on average 3.0299893276414087) internal successors, (397474), 131180 states have internal predecessors, (397474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:48,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131181 states to 131181 states and 397474 transitions. [2021-05-03 14:09:48,193 INFO L78 Accepts]: Start accepts. Automaton has 131181 states and 397474 transitions. Word has length 24 [2021-05-03 14:09:48,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:48,193 INFO L480 AbstractCegarLoop]: Abstraction has 131181 states and 397474 transitions. [2021-05-03 14:09:48,193 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) [2021-05-03 14:09:48,193 INFO L276 IsEmpty]: Start isEmpty. Operand 131181 states and 397474 transitions. [2021-05-03 14:09:48,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:09:48,238 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:48,238 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:48,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10574 [2021-05-03 14:09:48,439 INFO L428 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:48,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:48,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1392111828, now seen corresponding path program 278 times [2021-05-03 14:09:48,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:48,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926818799] [2021-05-03 14:09:48,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:48,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:09:48,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926818799] [2021-05-03 14:09:48,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635112315] [2021-05-03 14:09:48,509 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 [2021-05-03 14:09:48,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:48,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:48,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 14:09:48,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:48,579 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:09:48,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:48,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-03 14:09:48,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930774096] [2021-05-03 14:09:48,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:09:48,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:48,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:09:48,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:09:48,580 INFO L87 Difference]: Start difference. First operand 131181 states and 397474 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) [2021-05-03 14:09:49,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:49,583 INFO L93 Difference]: Finished difference Result 131473 states and 397928 transitions. [2021-05-03 14:09:49,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:09:49,597 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 24 [2021-05-03 14:09:49,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:49,860 INFO L225 Difference]: With dead ends: 131473 [2021-05-03 14:09:49,860 INFO L226 Difference]: Without dead ends: 131464 [2021-05-03 14:09:49,860 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 134.5ms TimeCoverageRelationStatistics Valid=205, Invalid=445, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:09:49,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131464 states. [2021-05-03 14:09:51,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131464 to 131129. [2021-05-03 14:09:51,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131129 states, 131128 states have (on average 3.030046976999573) internal successors, (397324), 131128 states have internal predecessors, (397324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:52,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131129 states to 131129 states and 397324 transitions. [2021-05-03 14:09:52,296 INFO L78 Accepts]: Start accepts. Automaton has 131129 states and 397324 transitions. Word has length 24 [2021-05-03 14:09:52,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:52,296 INFO L480 AbstractCegarLoop]: Abstraction has 131129 states and 397324 transitions. [2021-05-03 14:09:52,296 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) [2021-05-03 14:09:52,296 INFO L276 IsEmpty]: Start isEmpty. Operand 131129 states and 397324 transitions. [2021-05-03 14:09:52,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:09:52,344 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:52,344 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:52,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10575 [2021-05-03 14:09:52,549 INFO L428 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:52,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:52,549 INFO L82 PathProgramCache]: Analyzing trace with hash 318501480, now seen corresponding path program 279 times [2021-05-03 14:09:52,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:52,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540897310] [2021-05-03 14:09:52,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:52,624 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:52,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540897310] [2021-05-03 14:09:52,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427957127] [2021-05-03 14:09:52,624 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 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 [2021-05-03 14:09:52,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:09:52,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:52,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:09:52,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:52,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:52,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:09:52,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719448784] [2021-05-03 14:09:52,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:09:52,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:52,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:09:52,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:09:52,691 INFO L87 Difference]: Start difference. First operand 131129 states and 397324 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) [2021-05-03 14:09:53,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:53,263 INFO L93 Difference]: Finished difference Result 131345 states and 397633 transitions. [2021-05-03 14:09:53,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:09:53,264 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 24 [2021-05-03 14:09:53,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:53,545 INFO L225 Difference]: With dead ends: 131345 [2021-05-03 14:09:53,546 INFO L226 Difference]: Without dead ends: 131343 [2021-05-03 14:09:53,546 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:09:54,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131343 states. [2021-05-03 14:09:56,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131343 to 131121. [2021-05-03 14:09:56,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131121 states, 131120 states have (on average 3.0300030506406346) internal successors, (397294), 131120 states have internal predecessors, (397294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:56,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131121 states to 131121 states and 397294 transitions. [2021-05-03 14:09:56,717 INFO L78 Accepts]: Start accepts. Automaton has 131121 states and 397294 transitions. Word has length 24 [2021-05-03 14:09:56,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:56,717 INFO L480 AbstractCegarLoop]: Abstraction has 131121 states and 397294 transitions. [2021-05-03 14:09:56,717 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) [2021-05-03 14:09:56,717 INFO L276 IsEmpty]: Start isEmpty. Operand 131121 states and 397294 transitions. [2021-05-03 14:09:56,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:09:56,781 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:56,781 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:56,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10576 [2021-05-03 14:09:56,997 INFO L428 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:56,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:56,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1807906476, now seen corresponding path program 280 times [2021-05-03 14:09:56,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:56,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535229045] [2021-05-03 14:09:56,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:57,093 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:57,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535229045] [2021-05-03 14:09:57,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347689571] [2021-05-03 14:09:57,093 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 [2021-05-03 14:09:57,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:57,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:57,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:57,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:57,165 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 58 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:09:57,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:57,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2021-05-03 14:09:57,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220747637] [2021-05-03 14:09:57,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:09:57,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:57,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:09:57,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:09:57,168 INFO L87 Difference]: Start difference. First operand 131121 states and 397294 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) [2021-05-03 14:09:57,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:57,882 INFO L93 Difference]: Finished difference Result 131339 states and 397604 transitions. [2021-05-03 14:09:57,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 14:09:57,883 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 24 [2021-05-03 14:09:57,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:58,156 INFO L225 Difference]: With dead ends: 131339 [2021-05-03 14:09:58,157 INFO L226 Difference]: Without dead ends: 131336 [2021-05-03 14:09:58,157 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 179.5ms TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:09:58,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131336 states. [2021-05-03 14:10:00,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131336 to 131113. [2021-05-03 14:10:00,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131113 states, 131112 states have (on average 3.0299667459881627) internal successors, (397265), 131112 states have internal predecessors, (397265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:01,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131113 states to 131113 states and 397265 transitions. [2021-05-03 14:10:01,074 INFO L78 Accepts]: Start accepts. Automaton has 131113 states and 397265 transitions. Word has length 24 [2021-05-03 14:10:01,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:01,074 INFO L480 AbstractCegarLoop]: Abstraction has 131113 states and 397265 transitions. [2021-05-03 14:10:01,074 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) [2021-05-03 14:10:01,074 INFO L276 IsEmpty]: Start isEmpty. Operand 131113 states and 397265 transitions. [2021-05-03 14:10:01,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:10:01,119 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:01,119 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:01,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10577,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:01,320 INFO L428 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:01,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:01,320 INFO L82 PathProgramCache]: Analyzing trace with hash 734821096, now seen corresponding path program 281 times [2021-05-03 14:10:01,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:01,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424518420] [2021-05-03 14:10:01,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:01,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:01,412 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 39 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:01,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424518420] [2021-05-03 14:10:01,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877967266] [2021-05-03 14:10:01,413 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 [2021-05-03 14:10:01,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-03 14:10:01,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:01,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:01,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:01,480 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 59 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:10:01,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:01,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-05-03 14:10:01,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230576329] [2021-05-03 14:10:01,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:10:01,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:01,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:10:01,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:01,481 INFO L87 Difference]: Start difference. First operand 131113 states and 397265 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) [2021-05-03 14:10:02,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:02,167 INFO L93 Difference]: Finished difference Result 131264 states and 397507 transitions. [2021-05-03 14:10:02,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:10:02,167 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 24 [2021-05-03 14:10:02,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:02,477 INFO L225 Difference]: With dead ends: 131264 [2021-05-03 14:10:02,477 INFO L226 Difference]: Without dead ends: 131259 [2021-05-03 14:10:02,477 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 185.5ms TimeCoverageRelationStatistics Valid=332, Invalid=724, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:10:02,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131259 states. [2021-05-03 14:10:04,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131259 to 131113. [2021-05-03 14:10:05,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131113 states, 131112 states have (on average 3.029920983586552) internal successors, (397259), 131112 states have internal predecessors, (397259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:05,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131113 states to 131113 states and 397259 transitions. [2021-05-03 14:10:05,801 INFO L78 Accepts]: Start accepts. Automaton has 131113 states and 397259 transitions. Word has length 24 [2021-05-03 14:10:05,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:05,801 INFO L480 AbstractCegarLoop]: Abstraction has 131113 states and 397259 transitions. [2021-05-03 14:10:05,801 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) [2021-05-03 14:10:05,801 INFO L276 IsEmpty]: Start isEmpty. Operand 131113 states and 397259 transitions. [2021-05-03 14:10:05,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:10:05,850 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:05,850 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:06,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10578 [2021-05-03 14:10:06,064 INFO L428 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:06,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:06,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1943482834, now seen corresponding path program 282 times [2021-05-03 14:10:06,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:06,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358892692] [2021-05-03 14:10:06,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:06,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 26 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:10:06,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358892692] [2021-05-03 14:10:06,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20916090] [2021-05-03 14:10:06,132 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 [2021-05-03 14:10:06,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-03 14:10:06,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:06,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:10:06,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:06,233 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:10:06,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:06,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:10:06,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106914234] [2021-05-03 14:10:06,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:10:06,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:06,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:10:06,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:10:06,234 INFO L87 Difference]: Start difference. First operand 131113 states and 397259 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) [2021-05-03 14:10:06,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:06,805 INFO L93 Difference]: Finished difference Result 131472 states and 397913 transitions. [2021-05-03 14:10:06,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:10:06,806 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 24 [2021-05-03 14:10:06,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:07,114 INFO L225 Difference]: With dead ends: 131472 [2021-05-03 14:10:07,115 INFO L226 Difference]: Without dead ends: 131470 [2021-05-03 14:10:07,115 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:10:07,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131470 states. [2021-05-03 14:10:09,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131470 to 131189. [2021-05-03 14:10:09,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131189 states, 131188 states have (on average 3.0296902155684973) internal successors, (397459), 131188 states have internal predecessors, (397459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:10,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131189 states to 131189 states and 397459 transitions. [2021-05-03 14:10:10,285 INFO L78 Accepts]: Start accepts. Automaton has 131189 states and 397459 transitions. Word has length 24 [2021-05-03 14:10:10,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:10,285 INFO L480 AbstractCegarLoop]: Abstraction has 131189 states and 397459 transitions. [2021-05-03 14:10:10,285 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) [2021-05-03 14:10:10,285 INFO L276 IsEmpty]: Start isEmpty. Operand 131189 states and 397459 transitions. [2021-05-03 14:10:10,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:10:10,338 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:10,338 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:10,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10579,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:10,553 INFO L428 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:10,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:10,553 INFO L82 PathProgramCache]: Analyzing trace with hash -606029772, now seen corresponding path program 283 times [2021-05-03 14:10:10,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:10,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599893021] [2021-05-03 14:10:10,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:10:11,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599893021] [2021-05-03 14:10:11,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101297016] [2021-05-03 14:10:11,109 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 [2021-05-03 14:10:11,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:11,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 14:10:11,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:11,261 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 50 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:10:11,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:11,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-03 14:10:11,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125775047] [2021-05-03 14:10:11,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:10:11,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:11,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:10:11,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:10:11,264 INFO L87 Difference]: Start difference. First operand 131189 states and 397459 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) [2021-05-03 14:10:11,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:11,860 INFO L93 Difference]: Finished difference Result 131509 states and 397970 transitions. [2021-05-03 14:10:11,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:10:11,861 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 24 [2021-05-03 14:10:11,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:12,173 INFO L225 Difference]: With dead ends: 131509 [2021-05-03 14:10:12,173 INFO L226 Difference]: Without dead ends: 131502 [2021-05-03 14:10:12,173 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 582.7ms TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:10:12,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131502 states. [2021-05-03 14:10:14,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131502 to 131146. [2021-05-03 14:10:14,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131146 states, 131145 states have (on average 3.029646574402379) internal successors, (397323), 131145 states have internal predecessors, (397323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:15,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131146 states to 131146 states and 397323 transitions. [2021-05-03 14:10:15,192 INFO L78 Accepts]: Start accepts. Automaton has 131146 states and 397323 transitions. Word has length 24 [2021-05-03 14:10:15,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:15,192 INFO L480 AbstractCegarLoop]: Abstraction has 131146 states and 397323 transitions. [2021-05-03 14:10:15,193 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) [2021-05-03 14:10:15,193 INFO L276 IsEmpty]: Start isEmpty. Operand 131146 states and 397323 transitions. [2021-05-03 14:10:15,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:10:15,243 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:15,243 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:15,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10580,285 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:15,457 INFO L428 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:15,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:15,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1104583536, now seen corresponding path program 284 times [2021-05-03 14:10:15,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:15,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110469354] [2021-05-03 14:10:15,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:15,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:15,532 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:10:15,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110469354] [2021-05-03 14:10:15,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434018459] [2021-05-03 14:10:15,532 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 [2021-05-03 14:10:15,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:10:15,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:15,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:15,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:15,632 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:10:15,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:15,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2021-05-03 14:10:15,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291721973] [2021-05-03 14:10:15,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:10:15,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:15,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:10:15,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:10:15,633 INFO L87 Difference]: Start difference. First operand 131146 states and 397323 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) [2021-05-03 14:10:16,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:16,986 INFO L93 Difference]: Finished difference Result 131510 states and 397931 transitions. [2021-05-03 14:10:16,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:10:16,987 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 24 [2021-05-03 14:10:16,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:17,299 INFO L225 Difference]: With dead ends: 131510 [2021-05-03 14:10:17,300 INFO L226 Difference]: Without dead ends: 131508 [2021-05-03 14:10:17,300 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 150.2ms TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:10:17,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131508 states. [2021-05-03 14:10:19,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131508 to 131130. [2021-05-03 14:10:19,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131130 states, 131129 states have (on average 3.029581557092634) internal successors, (397266), 131129 states have internal predecessors, (397266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:20,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131130 states to 131130 states and 397266 transitions. [2021-05-03 14:10:20,239 INFO L78 Accepts]: Start accepts. Automaton has 131130 states and 397266 transitions. Word has length 24 [2021-05-03 14:10:20,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:20,239 INFO L480 AbstractCegarLoop]: Abstraction has 131130 states and 397266 transitions. [2021-05-03 14:10:20,239 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) [2021-05-03 14:10:20,239 INFO L276 IsEmpty]: Start isEmpty. Operand 131130 states and 397266 transitions. [2021-05-03 14:10:20,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:10:20,291 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:20,291 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:20,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10581,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:20,505 INFO L428 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:20,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:20,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1700978764, now seen corresponding path program 285 times [2021-05-03 14:10:20,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:20,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990104110] [2021-05-03 14:10:20,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:20,587 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:20,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990104110] [2021-05-03 14:10:20,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177185138] [2021-05-03 14:10:20,588 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 [2021-05-03 14:10:20,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-03 14:10:20,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:20,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:10:20,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:20,672 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:20,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:20,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:10:20,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549113903] [2021-05-03 14:10:20,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:10:20,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:20,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:10:20,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:10:20,673 INFO L87 Difference]: Start difference. First operand 131130 states and 397266 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) [2021-05-03 14:10:21,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:21,904 INFO L93 Difference]: Finished difference Result 131365 states and 397609 transitions. [2021-05-03 14:10:21,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:10:21,905 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 24 [2021-05-03 14:10:21,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:22,215 INFO L225 Difference]: With dead ends: 131365 [2021-05-03 14:10:22,215 INFO L226 Difference]: Without dead ends: 131362 [2021-05-03 14:10:22,215 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 174.8ms TimeCoverageRelationStatistics Valid=279, Invalid=591, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:10:22,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131362 states. [2021-05-03 14:10:24,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131362 to 131116. [2021-05-03 14:10:24,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131116 states, 131115 states have (on average 3.029531327460626) internal successors, (397217), 131115 states have internal predecessors, (397217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:25,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131116 states to 131116 states and 397217 transitions. [2021-05-03 14:10:25,129 INFO L78 Accepts]: Start accepts. Automaton has 131116 states and 397217 transitions. Word has length 24 [2021-05-03 14:10:25,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:25,129 INFO L480 AbstractCegarLoop]: Abstraction has 131116 states and 397217 transitions. [2021-05-03 14:10:25,129 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) [2021-05-03 14:10:25,129 INFO L276 IsEmpty]: Start isEmpty. Operand 131116 states and 397217 transitions. [2021-05-03 14:10:25,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:10:25,182 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:25,182 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:25,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10582,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:25,397 INFO L428 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:25,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:25,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1520903152, now seen corresponding path program 286 times [2021-05-03 14:10:25,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:25,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978505122] [2021-05-03 14:10:25,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:25,494 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:25,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978505122] [2021-05-03 14:10:25,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687100445] [2021-05-03 14:10:25,495 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 [2021-05-03 14:10:25,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:10:25,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:25,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:25,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:10:25,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:25,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-05-03 14:10:25,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227428673] [2021-05-03 14:10:25,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:10:25,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:25,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:10:25,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:25,566 INFO L87 Difference]: Start difference. First operand 131116 states and 397217 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) [2021-05-03 14:10:26,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:26,840 INFO L93 Difference]: Finished difference Result 131356 states and 397566 transitions. [2021-05-03 14:10:26,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 14:10:26,841 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 24 [2021-05-03 14:10:26,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:27,099 INFO L225 Difference]: With dead ends: 131356 [2021-05-03 14:10:27,099 INFO L226 Difference]: Without dead ends: 131351 [2021-05-03 14:10:27,100 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 214.6ms TimeCoverageRelationStatistics Valid=316, Invalid=676, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:10:27,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131351 states. [2021-05-03 14:10:29,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131351 to 131116. [2021-05-03 14:10:29,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131116 states, 131115 states have (on average 3.0294016702894404) internal successors, (397200), 131115 states have internal predecessors, (397200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:30,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131116 states to 131116 states and 397200 transitions. [2021-05-03 14:10:30,139 INFO L78 Accepts]: Start accepts. Automaton has 131116 states and 397200 transitions. Word has length 24 [2021-05-03 14:10:30,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:30,139 INFO L480 AbstractCegarLoop]: Abstraction has 131116 states and 397200 transitions. [2021-05-03 14:10:30,139 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) [2021-05-03 14:10:30,139 INFO L276 IsEmpty]: Start isEmpty. Operand 131116 states and 397200 transitions. [2021-05-03 14:10:30,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:10:30,193 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:30,193 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:30,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10583 [2021-05-03 14:10:30,407 INFO L428 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:30,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:30,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1679972556, now seen corresponding path program 287 times [2021-05-03 14:10:30,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:30,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295300186] [2021-05-03 14:10:30,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:30,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:30,502 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:30,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295300186] [2021-05-03 14:10:30,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348987773] [2021-05-03 14:10:30,503 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 [2021-05-03 14:10:30,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-03 14:10:30,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:30,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:30,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:10:30,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:30,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-05-03 14:10:30,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663130762] [2021-05-03 14:10:30,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:10:30,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:30,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:10:30,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:30,575 INFO L87 Difference]: Start difference. First operand 131116 states and 397200 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) [2021-05-03 14:10:31,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:31,242 INFO L93 Difference]: Finished difference Result 131372 states and 397726 transitions. [2021-05-03 14:10:31,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:10:31,242 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 24 [2021-05-03 14:10:31,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:31,512 INFO L225 Difference]: With dead ends: 131372 [2021-05-03 14:10:31,512 INFO L226 Difference]: Without dead ends: 131369 [2021-05-03 14:10:31,513 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 179.3ms TimeCoverageRelationStatistics Valid=233, Invalid=523, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:10:32,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131369 states. [2021-05-03 14:10:34,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131369 to 131116. [2021-05-03 14:10:34,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131116 states, 131115 states have (on average 3.0293787896121724) internal successors, (397197), 131115 states have internal predecessors, (397197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:35,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131116 states to 131116 states and 397197 transitions. [2021-05-03 14:10:35,024 INFO L78 Accepts]: Start accepts. Automaton has 131116 states and 397197 transitions. Word has length 24 [2021-05-03 14:10:35,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:35,024 INFO L480 AbstractCegarLoop]: Abstraction has 131116 states and 397197 transitions. [2021-05-03 14:10:35,024 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) [2021-05-03 14:10:35,024 INFO L276 IsEmpty]: Start isEmpty. Operand 131116 states and 397197 transitions. [2021-05-03 14:10:35,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:10:35,076 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:35,076 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:35,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10584,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:35,276 INFO L428 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:35,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:35,277 INFO L82 PathProgramCache]: Analyzing trace with hash 542222794, now seen corresponding path program 288 times [2021-05-03 14:10:35,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:35,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844961678] [2021-05-03 14:10:35,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:35,357 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 26 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:10:35,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844961678] [2021-05-03 14:10:35,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283840786] [2021-05-03 14:10:35,357 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 [2021-05-03 14:10:35,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-03 14:10:35,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:35,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:10:35,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:35,481 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:10:35,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:35,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:10:35,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131075137] [2021-05-03 14:10:35,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:10:35,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:35,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:10:35,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:10:35,481 INFO L87 Difference]: Start difference. First operand 131116 states and 397197 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) [2021-05-03 14:10:36,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:36,090 INFO L93 Difference]: Finished difference Result 131414 states and 397691 transitions. [2021-05-03 14:10:36,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:10:36,091 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 24 [2021-05-03 14:10:36,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:36,401 INFO L225 Difference]: With dead ends: 131414 [2021-05-03 14:10:36,402 INFO L226 Difference]: Without dead ends: 131412 [2021-05-03 14:10:36,402 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=126, Invalid=180, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:10:36,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131412 states. [2021-05-03 14:10:39,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131412 to 131150. [2021-05-03 14:10:39,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131150 states, 131149 states have (on average 3.029096676299476) internal successors, (397263), 131149 states have internal predecessors, (397263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:39,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131150 states to 131150 states and 397263 transitions. [2021-05-03 14:10:39,766 INFO L78 Accepts]: Start accepts. Automaton has 131150 states and 397263 transitions. Word has length 24 [2021-05-03 14:10:39,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:39,766 INFO L480 AbstractCegarLoop]: Abstraction has 131150 states and 397263 transitions. [2021-05-03 14:10:39,766 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) [2021-05-03 14:10:39,766 INFO L276 IsEmpty]: Start isEmpty. Operand 131150 states and 397263 transitions. [2021-05-03 14:10:39,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:10:39,811 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:39,811 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:40,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10585 [2021-05-03 14:10:40,012 INFO L428 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:40,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:40,012 INFO L82 PathProgramCache]: Analyzing trace with hash -2007289812, now seen corresponding path program 289 times [2021-05-03 14:10:40,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:40,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726516910] [2021-05-03 14:10:40,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:40,087 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:10:40,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726516910] [2021-05-03 14:10:40,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049849265] [2021-05-03 14:10:40,087 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 [2021-05-03 14:10:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:40,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 14:10:40,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:40,168 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:10:40,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:40,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-03 14:10:40,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528827241] [2021-05-03 14:10:40,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:10:40,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:40,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:10:40,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:10:40,168 INFO L87 Difference]: Start difference. First operand 131150 states and 397263 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) [2021-05-03 14:10:40,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:40,733 INFO L93 Difference]: Finished difference Result 131457 states and 397741 transitions. [2021-05-03 14:10:40,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:10:40,733 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 24 [2021-05-03 14:10:40,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:41,025 INFO L225 Difference]: With dead ends: 131457 [2021-05-03 14:10:41,025 INFO L226 Difference]: Without dead ends: 131452 [2021-05-03 14:10:41,025 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 114.5ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:10:41,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131452 states. [2021-05-03 14:10:43,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131452 to 131114. [2021-05-03 14:10:43,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131114 states, 131113 states have (on average 3.028967379283519) internal successors, (397137), 131113 states have internal predecessors, (397137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:43,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131114 states to 131114 states and 397137 transitions. [2021-05-03 14:10:43,851 INFO L78 Accepts]: Start accepts. Automaton has 131114 states and 397137 transitions. Word has length 24 [2021-05-03 14:10:43,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:43,851 INFO L480 AbstractCegarLoop]: Abstraction has 131114 states and 397137 transitions. [2021-05-03 14:10:43,851 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) [2021-05-03 14:10:43,851 INFO L276 IsEmpty]: Start isEmpty. Operand 131114 states and 397137 transitions. [2021-05-03 14:10:43,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:10:43,903 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:43,903 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:44,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10586 [2021-05-03 14:10:44,104 INFO L428 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:44,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:44,104 INFO L82 PathProgramCache]: Analyzing trace with hash -296676504, now seen corresponding path program 290 times [2021-05-03 14:10:44,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:44,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764830914] [2021-05-03 14:10:44,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:44,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764830914] [2021-05-03 14:10:44,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448142558] [2021-05-03 14:10:44,178 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 [2021-05-03 14:10:44,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:10:44,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:44,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:44,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 51 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:10:44,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:44,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2021-05-03 14:10:44,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005538333] [2021-05-03 14:10:44,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:10:44,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:44,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:10:44,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:10:44,596 INFO L87 Difference]: Start difference. First operand 131114 states and 397137 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) [2021-05-03 14:10:45,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:45,170 INFO L93 Difference]: Finished difference Result 131477 states and 397730 transitions. [2021-05-03 14:10:45,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:10:45,170 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 24 [2021-05-03 14:10:45,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:45,454 INFO L225 Difference]: With dead ends: 131477 [2021-05-03 14:10:45,454 INFO L226 Difference]: Without dead ends: 131475 [2021-05-03 14:10:45,454 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 135.5ms TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:10:45,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131475 states. [2021-05-03 14:10:47,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131475 to 131109. [2021-05-03 14:10:48,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131109 states, 131108 states have (on average 3.0287701742075237) internal successors, (397096), 131108 states have internal predecessors, (397096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:48,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131109 states to 131109 states and 397096 transitions. [2021-05-03 14:10:48,388 INFO L78 Accepts]: Start accepts. Automaton has 131109 states and 397096 transitions. Word has length 24 [2021-05-03 14:10:48,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:48,389 INFO L480 AbstractCegarLoop]: Abstraction has 131109 states and 397096 transitions. [2021-05-03 14:10:48,389 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) [2021-05-03 14:10:48,389 INFO L276 IsEmpty]: Start isEmpty. Operand 131109 states and 397096 transitions. [2021-05-03 14:10:48,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:10:48,435 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:48,435 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:48,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10587 [2021-05-03 14:10:48,635 INFO L428 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:48,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:48,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1192728492, now seen corresponding path program 291 times [2021-05-03 14:10:48,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:48,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27825327] [2021-05-03 14:10:48,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:48,715 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:10:48,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27825327] [2021-05-03 14:10:48,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956411034] [2021-05-03 14:10:48,715 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 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 [2021-05-03 14:10:48,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-03 14:10:48,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:48,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:10:48,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:48,785 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:10:48,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:48,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:10:48,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800983015] [2021-05-03 14:10:48,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:10:48,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:48,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:10:48,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:10:48,786 INFO L87 Difference]: Start difference. First operand 131109 states and 397096 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) [2021-05-03 14:10:49,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:49,797 INFO L93 Difference]: Finished difference Result 131340 states and 397434 transitions. [2021-05-03 14:10:49,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:10:49,798 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 24 [2021-05-03 14:10:49,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:50,088 INFO L225 Difference]: With dead ends: 131340 [2021-05-03 14:10:50,088 INFO L226 Difference]: Without dead ends: 131337 [2021-05-03 14:10:50,089 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 157.2ms TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:10:50,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131337 states. [2021-05-03 14:10:52,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131337 to 131102. [2021-05-03 14:10:52,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131102 states, 131101 states have (on average 3.0285733899817697) internal successors, (397049), 131101 states have internal predecessors, (397049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:52,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131102 states to 131102 states and 397049 transitions. [2021-05-03 14:10:52,907 INFO L78 Accepts]: Start accepts. Automaton has 131102 states and 397049 transitions. Word has length 24 [2021-05-03 14:10:52,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:52,907 INFO L480 AbstractCegarLoop]: Abstraction has 131102 states and 397049 transitions. [2021-05-03 14:10:52,907 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) [2021-05-03 14:10:52,907 INFO L276 IsEmpty]: Start isEmpty. Operand 131102 states and 397049 transitions. [2021-05-03 14:10:52,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:10:52,958 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:52,958 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:53,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10588,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:53,173 INFO L428 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:53,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:53,173 INFO L82 PathProgramCache]: Analyzing trace with hash 119643112, now seen corresponding path program 292 times [2021-05-03 14:10:53,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:53,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305694728] [2021-05-03 14:10:53,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:53,262 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:53,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305694728] [2021-05-03 14:10:53,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076063099] [2021-05-03 14:10:53,263 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 [2021-05-03 14:10:53,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:10:53,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:53,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:53,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:53,325 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:10:53,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:53,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-05-03 14:10:53,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138725455] [2021-05-03 14:10:53,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:10:53,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:53,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:10:53,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:53,325 INFO L87 Difference]: Start difference. First operand 131102 states and 397049 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) [2021-05-03 14:10:54,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:54,462 INFO L93 Difference]: Finished difference Result 131338 states and 397393 transitions. [2021-05-03 14:10:54,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:10:54,463 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 24 [2021-05-03 14:10:54,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:54,751 INFO L225 Difference]: With dead ends: 131338 [2021-05-03 14:10:54,751 INFO L226 Difference]: Without dead ends: 131333 [2021-05-03 14:10:54,751 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 189.3ms TimeCoverageRelationStatistics Valid=299, Invalid=631, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:10:54,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131333 states. [2021-05-03 14:10:56,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131333 to 131102. [2021-05-03 14:10:57,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131102 states, 131101 states have (on average 3.028352186482178) internal successors, (397020), 131101 states have internal predecessors, (397020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:57,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131102 states to 131102 states and 397020 transitions. [2021-05-03 14:10:57,429 INFO L78 Accepts]: Start accepts. Automaton has 131102 states and 397020 transitions. Word has length 24 [2021-05-03 14:10:57,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:57,430 INFO L480 AbstractCegarLoop]: Abstraction has 131102 states and 397020 transitions. [2021-05-03 14:10:57,430 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) [2021-05-03 14:10:57,430 INFO L276 IsEmpty]: Start isEmpty. Operand 131102 states and 397020 transitions. [2021-05-03 14:10:57,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:10:57,481 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:57,481 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:57,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10589 [2021-05-03 14:10:57,681 INFO L428 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:57,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:57,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1213734700, now seen corresponding path program 293 times [2021-05-03 14:10:57,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:57,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292329035] [2021-05-03 14:10:57,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:57,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:57,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292329035] [2021-05-03 14:10:57,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923132017] [2021-05-03 14:10:57,768 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 [2021-05-03 14:10:57,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-03 14:10:57,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:57,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:10:57,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:57,834 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:57,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:57,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-05-03 14:10:57,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075850115] [2021-05-03 14:10:57,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:10:57,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:57,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:10:57,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:57,835 INFO L87 Difference]: Start difference. First operand 131102 states and 397020 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) [2021-05-03 14:10:58,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:58,898 INFO L93 Difference]: Finished difference Result 131408 states and 397643 transitions. [2021-05-03 14:10:58,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:10:58,913 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 24 [2021-05-03 14:10:58,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:59,320 INFO L225 Difference]: With dead ends: 131408 [2021-05-03 14:10:59,320 INFO L226 Difference]: Without dead ends: 131405 [2021-05-03 14:10:59,320 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 152.6ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:10:59,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131405 states. [2021-05-03 14:11:01,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131405 to 131104. [2021-05-03 14:11:01,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131104 states, 131103 states have (on average 3.028328871192879) internal successors, (397023), 131103 states have internal predecessors, (397023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:02,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131104 states to 131104 states and 397023 transitions. [2021-05-03 14:11:02,148 INFO L78 Accepts]: Start accepts. Automaton has 131104 states and 397023 transitions. Word has length 24 [2021-05-03 14:11:02,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:02,148 INFO L480 AbstractCegarLoop]: Abstraction has 131104 states and 397023 transitions. [2021-05-03 14:11:02,148 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) [2021-05-03 14:11:02,148 INFO L276 IsEmpty]: Start isEmpty. Operand 131104 states and 397023 transitions. [2021-05-03 14:11:02,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:11:02,197 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:02,197 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:02,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10590,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:02,413 INFO L428 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:02,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:02,414 INFO L82 PathProgramCache]: Analyzing trace with hash 770835560, now seen corresponding path program 294 times [2021-05-03 14:11:02,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:02,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317770343] [2021-05-03 14:11:02,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:02,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317770343] [2021-05-03 14:11:02,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115684712] [2021-05-03 14:11:02,524 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 [2021-05-03 14:11:02,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-03 14:11:02,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:02,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:11:02,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:02,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:02,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-05-03 14:11:02,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945453507] [2021-05-03 14:11:02,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:11:02,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:02,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:11:02,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:11:02,597 INFO L87 Difference]: Start difference. First operand 131104 states and 397023 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) [2021-05-03 14:11:03,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:03,285 INFO L93 Difference]: Finished difference Result 131400 states and 397630 transitions. [2021-05-03 14:11:03,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:11:03,286 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 24 [2021-05-03 14:11:03,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:03,614 INFO L225 Difference]: With dead ends: 131400 [2021-05-03 14:11:03,614 INFO L226 Difference]: Without dead ends: 131396 [2021-05-03 14:11:03,614 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 198.2ms TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:11:03,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131396 states. [2021-05-03 14:11:06,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131396 to 131104. [2021-05-03 14:11:06,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131104 states, 131103 states have (on average 3.0283059884213177) internal successors, (397020), 131103 states have internal predecessors, (397020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:07,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131104 states to 131104 states and 397020 transitions. [2021-05-03 14:11:07,202 INFO L78 Accepts]: Start accepts. Automaton has 131104 states and 397020 transitions. Word has length 24 [2021-05-03 14:11:07,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:07,202 INFO L480 AbstractCegarLoop]: Abstraction has 131104 states and 397020 transitions. [2021-05-03 14:11:07,202 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) [2021-05-03 14:11:07,202 INFO L276 IsEmpty]: Start isEmpty. Operand 131104 states and 397020 transitions. [2021-05-03 14:11:07,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:11:07,259 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:07,260 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:07,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10591,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:07,465 INFO L428 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:07,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:07,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1666696844, now seen corresponding path program 295 times [2021-05-03 14:11:07,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:07,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222375428] [2021-05-03 14:11:07,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:07,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:07,551 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:07,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222375428] [2021-05-03 14:11:07,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847951250] [2021-05-03 14:11:07,552 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 [2021-05-03 14:11:07,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:07,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:07,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:07,615 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:11:07,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:07,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2021-05-03 14:11:07,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108863296] [2021-05-03 14:11:07,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:11:07,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:07,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:11:07,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:11:07,616 INFO L87 Difference]: Start difference. First operand 131104 states and 397020 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) [2021-05-03 14:11:08,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:08,303 INFO L93 Difference]: Finished difference Result 131360 states and 397542 transitions. [2021-05-03 14:11:08,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:11:08,304 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 24 [2021-05-03 14:11:08,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:08,613 INFO L225 Difference]: With dead ends: 131360 [2021-05-03 14:11:08,614 INFO L226 Difference]: Without dead ends: 131357 [2021-05-03 14:11:08,614 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 180.6ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:11:08,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131357 states. [2021-05-03 14:11:11,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131357 to 131089. [2021-05-03 14:11:11,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131089 states, 131088 states have (on average 3.0283626266324912) internal successors, (396982), 131088 states have internal predecessors, (396982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:11,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131089 states to 131089 states and 396982 transitions. [2021-05-03 14:11:11,624 INFO L78 Accepts]: Start accepts. Automaton has 131089 states and 396982 transitions. Word has length 24 [2021-05-03 14:11:11,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:11,624 INFO L480 AbstractCegarLoop]: Abstraction has 131089 states and 396982 transitions. [2021-05-03 14:11:11,624 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) [2021-05-03 14:11:11,624 INFO L276 IsEmpty]: Start isEmpty. Operand 131089 states and 396982 transitions. [2021-05-03 14:11:11,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:11:11,673 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:11,673 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:11,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10592 [2021-05-03 14:11:11,887 INFO L428 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:11,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:11,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1360813274, now seen corresponding path program 296 times [2021-05-03 14:11:11,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:11,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563063255] [2021-05-03 14:11:11,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:11,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:11,987 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:11,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563063255] [2021-05-03 14:11:11,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092851351] [2021-05-03 14:11:11,987 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 [2021-05-03 14:11:12,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:11:12,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:12,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:12,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:12,527 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:11:12,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:12,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-05-03 14:11:12,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675716432] [2021-05-03 14:11:12,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:11:12,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:12,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:11:12,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:11:12,527 INFO L87 Difference]: Start difference. First operand 131089 states and 396982 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) [2021-05-03 14:11:13,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:13,321 INFO L93 Difference]: Finished difference Result 131311 states and 397318 transitions. [2021-05-03 14:11:13,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:11:13,322 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 24 [2021-05-03 14:11:13,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:13,632 INFO L225 Difference]: With dead ends: 131311 [2021-05-03 14:11:13,632 INFO L226 Difference]: Without dead ends: 131308 [2021-05-03 14:11:13,632 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 177.4ms TimeCoverageRelationStatistics Valid=275, Invalid=595, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:11:13,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131308 states. [2021-05-03 14:11:16,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131308 to 131087. [2021-05-03 14:11:16,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131087 states, 131086 states have (on average 3.028195230611965) internal successors, (396954), 131086 states have internal predecessors, (396954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:16,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131087 states to 131087 states and 396954 transitions. [2021-05-03 14:11:16,720 INFO L78 Accepts]: Start accepts. Automaton has 131087 states and 396954 transitions. Word has length 24 [2021-05-03 14:11:16,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:16,720 INFO L480 AbstractCegarLoop]: Abstraction has 131087 states and 396954 transitions. [2021-05-03 14:11:16,720 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) [2021-05-03 14:11:16,720 INFO L276 IsEmpty]: Start isEmpty. Operand 131087 states and 396954 transitions. [2021-05-03 14:11:16,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:11:16,769 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:16,769 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:16,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10593,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:16,983 INFO L428 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:16,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:16,984 INFO L82 PathProgramCache]: Analyzing trace with hash 917914134, now seen corresponding path program 297 times [2021-05-03 14:11:16,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:16,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444218923] [2021-05-03 14:11:16,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:17,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444218923] [2021-05-03 14:11:17,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152879301] [2021-05-03 14:11:17,082 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 [2021-05-03 14:11:17,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-03 14:11:17,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:17,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:11:17,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:17,169 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:17,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:17,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-05-03 14:11:17,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848578294] [2021-05-03 14:11:17,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:11:17,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:17,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:11:17,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:11:17,170 INFO L87 Difference]: Start difference. First operand 131087 states and 396954 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) [2021-05-03 14:11:18,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:18,439 INFO L93 Difference]: Finished difference Result 131552 states and 397896 transitions. [2021-05-03 14:11:18,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:11:18,440 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 24 [2021-05-03 14:11:18,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:18,784 INFO L225 Difference]: With dead ends: 131552 [2021-05-03 14:11:18,784 INFO L226 Difference]: Without dead ends: 131544 [2021-05-03 14:11:18,785 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 205.3ms TimeCoverageRelationStatistics Valid=290, Invalid=640, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:11:18,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131544 states. [2021-05-03 14:11:21,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131544 to 131094. [2021-05-03 14:11:21,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131094 states, 131093 states have (on average 3.0281555842035806) internal successors, (396970), 131093 states have internal predecessors, (396970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:21,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131094 states to 131094 states and 396970 transitions. [2021-05-03 14:11:21,830 INFO L78 Accepts]: Start accepts. Automaton has 131094 states and 396970 transitions. Word has length 24 [2021-05-03 14:11:21,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:21,830 INFO L480 AbstractCegarLoop]: Abstraction has 131094 states and 396970 transitions. [2021-05-03 14:11:21,830 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) [2021-05-03 14:11:21,830 INFO L276 IsEmpty]: Start isEmpty. Operand 131094 states and 396970 transitions. [2021-05-03 14:11:21,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:11:21,881 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:21,881 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:22,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10594,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:22,097 INFO L428 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:22,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:22,097 INFO L82 PathProgramCache]: Analyzing trace with hash 52834514, now seen corresponding path program 298 times [2021-05-03 14:11:22,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:22,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191693218] [2021-05-03 14:11:22,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:22,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:22,160 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:11:22,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191693218] [2021-05-03 14:11:22,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93968183] [2021-05-03 14:11:22,161 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 [2021-05-03 14:11:22,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:11:22,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:22,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:11:22,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:11:22,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:22,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:11:22,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335938676] [2021-05-03 14:11:22,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:11:22,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:22,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:11:22,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:11:22,233 INFO L87 Difference]: Start difference. First operand 131094 states and 396970 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) [2021-05-03 14:11:23,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:23,464 INFO L93 Difference]: Finished difference Result 131378 states and 397470 transitions. [2021-05-03 14:11:23,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:11:23,465 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 24 [2021-05-03 14:11:23,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:23,777 INFO L225 Difference]: With dead ends: 131378 [2021-05-03 14:11:23,777 INFO L226 Difference]: Without dead ends: 131378 [2021-05-03 14:11:23,777 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=114, Invalid=158, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:11:23,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131378 states. [2021-05-03 14:11:26,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131378 to 131115. [2021-05-03 14:11:26,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131115 states, 131114 states have (on average 3.0280900590325976) internal successors, (397025), 131114 states have internal predecessors, (397025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:26,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131115 states to 131115 states and 397025 transitions. [2021-05-03 14:11:26,893 INFO L78 Accepts]: Start accepts. Automaton has 131115 states and 397025 transitions. Word has length 24 [2021-05-03 14:11:26,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:26,893 INFO L480 AbstractCegarLoop]: Abstraction has 131115 states and 397025 transitions. [2021-05-03 14:11:26,893 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) [2021-05-03 14:11:26,893 INFO L276 IsEmpty]: Start isEmpty. Operand 131115 states and 397025 transitions. [2021-05-03 14:11:26,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:11:26,944 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:26,944 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:27,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10595 [2021-05-03 14:11:27,159 INFO L428 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:27,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:27,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1798289204, now seen corresponding path program 299 times [2021-05-03 14:11:27,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:27,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680656522] [2021-05-03 14:11:27,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:27,221 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:11:27,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680656522] [2021-05-03 14:11:27,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867531809] [2021-05-03 14:11:27,221 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 [2021-05-03 14:11:27,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:11:27,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:27,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:27,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:27,291 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:11:27,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:27,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-03 14:11:27,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977654026] [2021-05-03 14:11:27,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:11:27,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:27,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:11:27,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:11:27,292 INFO L87 Difference]: Start difference. First operand 131115 states and 397025 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) [2021-05-03 14:11:27,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:27,864 INFO L93 Difference]: Finished difference Result 131464 states and 397561 transitions. [2021-05-03 14:11:27,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:11:27,865 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 24 [2021-05-03 14:11:27,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:28,183 INFO L225 Difference]: With dead ends: 131464 [2021-05-03 14:11:28,183 INFO L226 Difference]: Without dead ends: 131461 [2021-05-03 14:11:28,184 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:11:28,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131461 states. [2021-05-03 14:11:30,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131461 to 131127. [2021-05-03 14:11:31,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131127 states, 131126 states have (on average 3.0277290544972013) internal successors, (397014), 131126 states have internal predecessors, (397014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:31,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131127 states to 131127 states and 397014 transitions. [2021-05-03 14:11:31,387 INFO L78 Accepts]: Start accepts. Automaton has 131127 states and 397014 transitions. Word has length 24 [2021-05-03 14:11:31,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:31,387 INFO L480 AbstractCegarLoop]: Abstraction has 131127 states and 397014 transitions. [2021-05-03 14:11:31,388 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) [2021-05-03 14:11:31,388 INFO L276 IsEmpty]: Start isEmpty. Operand 131127 states and 397014 transitions. [2021-05-03 14:11:31,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:11:31,435 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:31,435 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:31,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 301 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10596 [2021-05-03 14:11:31,635 INFO L428 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:31,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:31,635 INFO L82 PathProgramCache]: Analyzing trace with hash 703340212, now seen corresponding path program 300 times [2021-05-03 14:11:31,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:31,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483598274] [2021-05-03 14:11:31,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:31,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:31,706 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:31,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483598274] [2021-05-03 14:11:31,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48927487] [2021-05-03 14:11:31,707 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 [2021-05-03 14:11:31,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:11:31,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:31,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:11:31,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:31,772 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:31,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:31,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:11:31,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762149457] [2021-05-03 14:11:31,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:11:31,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:31,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:11:31,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:11:31,772 INFO L87 Difference]: Start difference. First operand 131127 states and 397014 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) [2021-05-03 14:11:32,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:32,428 INFO L93 Difference]: Finished difference Result 131365 states and 397357 transitions. [2021-05-03 14:11:32,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:11:32,434 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 24 [2021-05-03 14:11:32,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:32,686 INFO L225 Difference]: With dead ends: 131365 [2021-05-03 14:11:32,687 INFO L226 Difference]: Without dead ends: 131358 [2021-05-03 14:11:32,687 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 137.8ms TimeCoverageRelationStatistics Valid=248, Invalid=508, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:11:32,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131358 states. [2021-05-03 14:11:34,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131358 to 131081. [2021-05-03 14:11:35,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131081 states, 131080 states have (on average 3.0275785779676534) internal successors, (396855), 131080 states have internal predecessors, (396855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:35,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131081 states to 131081 states and 396855 transitions. [2021-05-03 14:11:35,771 INFO L78 Accepts]: Start accepts. Automaton has 131081 states and 396855 transitions. Word has length 24 [2021-05-03 14:11:35,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:35,771 INFO L480 AbstractCegarLoop]: Abstraction has 131081 states and 396855 transitions. [2021-05-03 14:11:35,771 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) [2021-05-03 14:11:35,771 INFO L276 IsEmpty]: Start isEmpty. Operand 131081 states and 396855 transitions. [2021-05-03 14:11:35,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:11:35,815 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:35,815 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:36,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10597 [2021-05-03 14:11:36,016 INFO L428 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:36,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:36,016 INFO L82 PathProgramCache]: Analyzing trace with hash -369745168, now seen corresponding path program 301 times [2021-05-03 14:11:36,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:36,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215602169] [2021-05-03 14:11:36,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:36,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:36,092 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 27 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:11:36,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215602169] [2021-05-03 14:11:36,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297523789] [2021-05-03 14:11:36,092 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 [2021-05-03 14:11:36,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:36,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:36,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:36,159 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:11:36,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:36,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-05-03 14:11:36,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606432216] [2021-05-03 14:11:36,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:11:36,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:36,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:11:36,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:11:36,159 INFO L87 Difference]: Start difference. First operand 131081 states and 396855 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) [2021-05-03 14:11:36,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:36,793 INFO L93 Difference]: Finished difference Result 131320 states and 397204 transitions. [2021-05-03 14:11:36,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:11:36,793 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 24 [2021-05-03 14:11:36,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:37,085 INFO L225 Difference]: With dead ends: 131320 [2021-05-03 14:11:37,085 INFO L226 Difference]: Without dead ends: 131315 [2021-05-03 14:11:37,085 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 160.6ms TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:11:37,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131315 states. [2021-05-03 14:11:39,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131315 to 131074. [2021-05-03 14:11:39,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131074 states, 131073 states have (on average 3.0273053947037147) internal successors, (396798), 131073 states have internal predecessors, (396798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:39,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131074 states to 131074 states and 396798 transitions. [2021-05-03 14:11:39,986 INFO L78 Accepts]: Start accepts. Automaton has 131074 states and 396798 transitions. Word has length 24 [2021-05-03 14:11:39,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:39,986 INFO L480 AbstractCegarLoop]: Abstraction has 131074 states and 396798 transitions. [2021-05-03 14:11:39,986 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) [2021-05-03 14:11:39,986 INFO L276 IsEmpty]: Start isEmpty. Operand 131074 states and 396798 transitions. [2021-05-03 14:11:40,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:11:40,358 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:40,358 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:40,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10598,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:40,572 INFO L428 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:40,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:40,573 INFO L82 PathProgramCache]: Analyzing trace with hash 724346420, now seen corresponding path program 302 times [2021-05-03 14:11:40,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:40,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951418019] [2021-05-03 14:11:40,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:40,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:40,661 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:40,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951418019] [2021-05-03 14:11:40,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885006445] [2021-05-03 14:11:40,662 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 [2021-05-03 14:11:40,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:11:40,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:40,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:40,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:40,728 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:11:40,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:40,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-05-03 14:11:40,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242534443] [2021-05-03 14:11:40,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:11:40,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:40,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:11:40,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:11:40,729 INFO L87 Difference]: Start difference. First operand 131074 states and 396798 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) [2021-05-03 14:11:41,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:41,359 INFO L93 Difference]: Finished difference Result 131318 states and 397153 transitions. [2021-05-03 14:11:41,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:11:41,360 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 24 [2021-05-03 14:11:41,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:41,650 INFO L225 Difference]: With dead ends: 131318 [2021-05-03 14:11:41,650 INFO L226 Difference]: Without dead ends: 131312 [2021-05-03 14:11:41,650 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 181.5ms TimeCoverageRelationStatistics Valid=317, Invalid=675, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:11:41,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131312 states. [2021-05-03 14:11:43,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131312 to 131075. [2021-05-03 14:11:44,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131075 states, 131074 states have (on average 3.026984756702321) internal successors, (396759), 131074 states have internal predecessors, (396759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:44,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131075 states to 131075 states and 396759 transitions. [2021-05-03 14:11:44,407 INFO L78 Accepts]: Start accepts. Automaton has 131075 states and 396759 transitions. Word has length 24 [2021-05-03 14:11:44,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:44,407 INFO L480 AbstractCegarLoop]: Abstraction has 131075 states and 396759 transitions. [2021-05-03 14:11:44,407 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) [2021-05-03 14:11:44,407 INFO L276 IsEmpty]: Start isEmpty. Operand 131075 states and 396759 transitions. [2021-05-03 14:11:44,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:11:44,457 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:44,457 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:44,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10599 [2021-05-03 14:11:44,658 INFO L428 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:44,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:44,658 INFO L82 PathProgramCache]: Analyzing trace with hash 281447280, now seen corresponding path program 303 times [2021-05-03 14:11:44,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:44,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195820627] [2021-05-03 14:11:44,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:44,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:44,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195820627] [2021-05-03 14:11:44,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670440913] [2021-05-03 14:11:44,747 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 [2021-05-03 14:11:44,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-03 14:11:44,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:44,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:11:44,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:44,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:44,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-05-03 14:11:44,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030604829] [2021-05-03 14:11:44,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:11:44,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:44,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:11:44,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:11:44,821 INFO L87 Difference]: Start difference. First operand 131075 states and 396759 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) [2021-05-03 14:11:45,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:45,853 INFO L93 Difference]: Finished difference Result 131674 states and 397979 transitions. [2021-05-03 14:11:45,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:11:45,853 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 24 [2021-05-03 14:11:45,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:46,169 INFO L225 Difference]: With dead ends: 131674 [2021-05-03 14:11:46,169 INFO L226 Difference]: Without dead ends: 131666 [2021-05-03 14:11:46,169 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 573.5ms TimeCoverageRelationStatistics Valid=332, Invalid=724, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:11:46,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131666 states. [2021-05-03 14:11:48,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131666 to 131083. [2021-05-03 14:11:48,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131083 states, 131082 states have (on average 3.026937336934133) internal successors, (396777), 131082 states have internal predecessors, (396777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:49,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131083 states to 131083 states and 396777 transitions. [2021-05-03 14:11:49,037 INFO L78 Accepts]: Start accepts. Automaton has 131083 states and 396777 transitions. Word has length 24 [2021-05-03 14:11:49,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:49,037 INFO L480 AbstractCegarLoop]: Abstraction has 131083 states and 396777 transitions. [2021-05-03 14:11:49,037 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) [2021-05-03 14:11:49,037 INFO L276 IsEmpty]: Start isEmpty. Operand 131083 states and 396777 transitions. [2021-05-03 14:11:49,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:11:49,091 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:49,091 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:49,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10600 [2021-05-03 14:11:49,306 INFO L428 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:49,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:49,306 INFO L82 PathProgramCache]: Analyzing trace with hash -563524172, now seen corresponding path program 304 times [2021-05-03 14:11:49,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:49,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714605875] [2021-05-03 14:11:49,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:49,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 39 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:49,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714605875] [2021-05-03 14:11:49,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914838402] [2021-05-03 14:11:49,412 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 [2021-05-03 14:11:49,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:11:49,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:49,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:49,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:49,500 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 50 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:11:49,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:49,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-05-03 14:11:49,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672987982] [2021-05-03 14:11:49,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:11:49,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:49,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:11:49,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:11:49,501 INFO L87 Difference]: Start difference. First operand 131083 states and 396777 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) [2021-05-03 14:11:50,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:50,696 INFO L93 Difference]: Finished difference Result 131661 states and 397955 transitions. [2021-05-03 14:11:50,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:11:50,697 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 24 [2021-05-03 14:11:50,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:51,045 INFO L225 Difference]: With dead ends: 131661 [2021-05-03 14:11:51,045 INFO L226 Difference]: Without dead ends: 131646 [2021-05-03 14:11:51,045 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 223.2ms TimeCoverageRelationStatistics Valid=330, Invalid=726, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:11:51,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131646 states. [2021-05-03 14:11:53,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131646 to 131092. [2021-05-03 14:11:53,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131092 states, 131091 states have (on average 3.0268515763858694) internal successors, (396793), 131091 states have internal predecessors, (396793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:54,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131092 states to 131092 states and 396793 transitions. [2021-05-03 14:11:54,046 INFO L78 Accepts]: Start accepts. Automaton has 131092 states and 396793 transitions. Word has length 24 [2021-05-03 14:11:54,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:54,046 INFO L480 AbstractCegarLoop]: Abstraction has 131092 states and 396793 transitions. [2021-05-03 14:11:54,046 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) [2021-05-03 14:11:54,046 INFO L276 IsEmpty]: Start isEmpty. Operand 131092 states and 396793 transitions. [2021-05-03 14:11:54,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:11:54,097 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:54,097 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:54,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10601 [2021-05-03 14:11:54,312 INFO L428 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:54,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:54,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1182382632, now seen corresponding path program 305 times [2021-05-03 14:11:54,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:54,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303810034] [2021-05-03 14:11:54,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:54,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:54,447 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:54,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303810034] [2021-05-03 14:11:54,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569509869] [2021-05-03 14:11:54,447 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) [2021-05-03 14:11:54,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-03 14:11:54,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:54,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:11:54,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:54,533 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:54,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:54,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-05-03 14:11:54,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780025278] [2021-05-03 14:11:54,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:11:54,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:54,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:11:54,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:11:54,534 INFO L87 Difference]: Start difference. First operand 131092 states and 396793 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) [2021-05-03 14:11:55,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:55,909 INFO L93 Difference]: Finished difference Result 131394 states and 397427 transitions. [2021-05-03 14:11:55,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:11:55,910 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 24 [2021-05-03 14:11:55,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:56,211 INFO L225 Difference]: With dead ends: 131394 [2021-05-03 14:11:56,212 INFO L226 Difference]: Without dead ends: 131390 [2021-05-03 14:11:56,212 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 206.6ms TimeCoverageRelationStatistics Valid=252, Invalid=560, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:11:56,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131390 states. [2021-05-03 14:11:58,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131390 to 131082. [2021-05-03 14:11:58,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131082 states, 131081 states have (on average 3.0267544495388345) internal successors, (396750), 131081 states have internal predecessors, (396750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:59,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131082 states to 131082 states and 396750 transitions. [2021-05-03 14:11:59,060 INFO L78 Accepts]: Start accepts. Automaton has 131082 states and 396750 transitions. Word has length 24 [2021-05-03 14:11:59,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:59,060 INFO L480 AbstractCegarLoop]: Abstraction has 131082 states and 396750 transitions. [2021-05-03 14:11:59,060 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) [2021-05-03 14:11:59,061 INFO L276 IsEmpty]: Start isEmpty. Operand 131082 states and 396750 transitions. [2021-05-03 14:11:59,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:11:59,105 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:59,105 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:59,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10602 [2021-05-03 14:11:59,305 INFO L428 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:59,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:59,305 INFO L82 PathProgramCache]: Analyzing trace with hash 545915778, now seen corresponding path program 306 times [2021-05-03 14:11:59,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:59,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555455966] [2021-05-03 14:11:59,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:59,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:59,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555455966] [2021-05-03 14:11:59,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587374435] [2021-05-03 14:11:59,395 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 [2021-05-03 14:11:59,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:11:59,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:59,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:11:59,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:59,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:59,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-05-03 14:11:59,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731413806] [2021-05-03 14:11:59,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:11:59,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:59,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:11:59,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:11:59,475 INFO L87 Difference]: Start difference. First operand 131082 states and 396750 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) [2021-05-03 14:12:00,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:00,106 INFO L93 Difference]: Finished difference Result 131351 states and 397199 transitions. [2021-05-03 14:12:00,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:12:00,107 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 24 [2021-05-03 14:12:00,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:00,824 INFO L225 Difference]: With dead ends: 131351 [2021-05-03 14:12:00,824 INFO L226 Difference]: Without dead ends: 131347 [2021-05-03 14:12:00,824 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 179.6ms TimeCoverageRelationStatistics Valid=291, Invalid=639, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:12:00,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131347 states. [2021-05-03 14:12:02,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131347 to 131079. [2021-05-03 14:12:03,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131079 states, 131078 states have (on average 3.0264804162407115) internal successors, (396705), 131078 states have internal predecessors, (396705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:03,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131079 states to 131079 states and 396705 transitions. [2021-05-03 14:12:03,640 INFO L78 Accepts]: Start accepts. Automaton has 131079 states and 396705 transitions. Word has length 24 [2021-05-03 14:12:03,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:03,640 INFO L480 AbstractCegarLoop]: Abstraction has 131079 states and 396705 transitions. [2021-05-03 14:12:03,640 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) [2021-05-03 14:12:03,640 INFO L276 IsEmpty]: Start isEmpty. Operand 131079 states and 396705 transitions. [2021-05-03 14:12:03,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:12:03,719 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:03,719 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:03,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10603,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:03,933 INFO L428 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:03,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:03,933 INFO L82 PathProgramCache]: Analyzing trace with hash -299055674, now seen corresponding path program 307 times [2021-05-03 14:12:03,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:03,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633785334] [2021-05-03 14:12:03,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:03,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:04,028 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:04,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633785334] [2021-05-03 14:12:04,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351562763] [2021-05-03 14:12:04,028 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 [2021-05-03 14:12:04,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:04,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:04,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:04,095 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:12:04,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:04,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-05-03 14:12:04,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738969702] [2021-05-03 14:12:04,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:12:04,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:04,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:12:04,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:12:04,096 INFO L87 Difference]: Start difference. First operand 131079 states and 396705 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) [2021-05-03 14:12:04,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:04,753 INFO L93 Difference]: Finished difference Result 131763 states and 398113 transitions. [2021-05-03 14:12:04,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:12:04,754 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 24 [2021-05-03 14:12:04,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:05,034 INFO L225 Difference]: With dead ends: 131763 [2021-05-03 14:12:05,034 INFO L226 Difference]: Without dead ends: 131748 [2021-05-03 14:12:05,034 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 206.5ms TimeCoverageRelationStatistics Valid=327, Invalid=729, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:12:05,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131748 states. [2021-05-03 14:12:07,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131748 to 131119. [2021-05-03 14:12:07,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131119 states, 131118 states have (on average 3.0261825226132184) internal successors, (396787), 131118 states have internal predecessors, (396787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:08,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131119 states to 131119 states and 396787 transitions. [2021-05-03 14:12:08,638 INFO L78 Accepts]: Start accepts. Automaton has 131119 states and 396787 transitions. Word has length 24 [2021-05-03 14:12:08,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:08,638 INFO L480 AbstractCegarLoop]: Abstraction has 131119 states and 396787 transitions. [2021-05-03 14:12:08,638 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) [2021-05-03 14:12:08,638 INFO L276 IsEmpty]: Start isEmpty. Operand 131119 states and 396787 transitions. [2021-05-03 14:12:08,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:12:08,691 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:08,691 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:08,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10604 [2021-05-03 14:12:08,901 INFO L428 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:08,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:08,901 INFO L82 PathProgramCache]: Analyzing trace with hash 2061667018, now seen corresponding path program 308 times [2021-05-03 14:12:08,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:08,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686587786] [2021-05-03 14:12:08,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:08,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:08,966 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:12:08,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686587786] [2021-05-03 14:12:08,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215765753] [2021-05-03 14:12:08,966 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) [2021-05-03 14:12:08,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:12:08,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:08,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:08,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:09,042 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 21 proven. 59 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:12:09,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:09,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-03 14:12:09,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953728973] [2021-05-03 14:12:09,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:12:09,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:09,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:12:09,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:12:09,043 INFO L87 Difference]: Start difference. First operand 131119 states and 396787 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) [2021-05-03 14:12:09,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:09,635 INFO L93 Difference]: Finished difference Result 131485 states and 397395 transitions. [2021-05-03 14:12:09,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:12:09,636 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 24 [2021-05-03 14:12:09,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:09,950 INFO L225 Difference]: With dead ends: 131485 [2021-05-03 14:12:09,951 INFO L226 Difference]: Without dead ends: 131485 [2021-05-03 14:12:09,951 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 86.5ms TimeCoverageRelationStatistics Valid=133, Invalid=209, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:12:10,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131485 states. [2021-05-03 14:12:12,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131485 to 131093. [2021-05-03 14:12:12,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131093 states, 131092 states have (on average 3.025852073353065) internal successors, (396665), 131092 states have internal predecessors, (396665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:13,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131093 states to 131093 states and 396665 transitions. [2021-05-03 14:12:13,094 INFO L78 Accepts]: Start accepts. Automaton has 131093 states and 396665 transitions. Word has length 24 [2021-05-03 14:12:13,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:13,094 INFO L480 AbstractCegarLoop]: Abstraction has 131093 states and 396665 transitions. [2021-05-03 14:12:13,094 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) [2021-05-03 14:12:13,094 INFO L276 IsEmpty]: Start isEmpty. Operand 131093 states and 396665 transitions. [2021-05-03 14:12:13,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:12:13,145 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:13,145 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:13,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10605,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:13,353 INFO L428 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:13,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:13,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1582794580, now seen corresponding path program 309 times [2021-05-03 14:12:13,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:13,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71475045] [2021-05-03 14:12:13,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:13,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:13,432 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:13,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71475045] [2021-05-03 14:12:13,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389781257] [2021-05-03 14:12:13,432 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 [2021-05-03 14:12:13,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-03 14:12:13,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:13,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:12:13,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:13,936 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:13,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:13,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:12:13,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636190027] [2021-05-03 14:12:13,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:12:13,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:13,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:12:13,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:12:13,937 INFO L87 Difference]: Start difference. First operand 131093 states and 396665 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) [2021-05-03 14:12:14,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:14,625 INFO L93 Difference]: Finished difference Result 131333 states and 397012 transitions. [2021-05-03 14:12:14,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:12:14,625 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 24 [2021-05-03 14:12:14,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:14,947 INFO L225 Difference]: With dead ends: 131333 [2021-05-03 14:12:14,947 INFO L226 Difference]: Without dead ends: 131328 [2021-05-03 14:12:14,947 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 152.4ms TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:12:15,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131328 states. [2021-05-03 14:12:17,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131328 to 131072. [2021-05-03 14:12:17,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131072 states, 131071 states have (on average 3.0252458591145257) internal successors, (396522), 131071 states have internal predecessors, (396522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:17,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131072 states to 131072 states and 396522 transitions. [2021-05-03 14:12:17,941 INFO L78 Accepts]: Start accepts. Automaton has 131072 states and 396522 transitions. Word has length 24 [2021-05-03 14:12:17,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:17,941 INFO L480 AbstractCegarLoop]: Abstraction has 131072 states and 396522 transitions. [2021-05-03 14:12:17,941 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) [2021-05-03 14:12:17,941 INFO L276 IsEmpty]: Start isEmpty. Operand 131072 states and 396522 transitions. [2021-05-03 14:12:17,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:12:17,993 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:17,993 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:18,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10606,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:18,208 INFO L428 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:18,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:18,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1639087336, now seen corresponding path program 310 times [2021-05-03 14:12:18,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:18,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876083732] [2021-05-03 14:12:18,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:18,293 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:18,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876083732] [2021-05-03 14:12:18,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687457107] [2021-05-03 14:12:18,294 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 [2021-05-03 14:12:18,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:12:18,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:18,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:18,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:12:18,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:18,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-05-03 14:12:18,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245822739] [2021-05-03 14:12:18,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:12:18,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:18,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:12:18,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:12:18,369 INFO L87 Difference]: Start difference. First operand 131072 states and 396522 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) [2021-05-03 14:12:19,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:19,389 INFO L93 Difference]: Finished difference Result 131314 states and 396874 transitions. [2021-05-03 14:12:19,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:12:19,390 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 24 [2021-05-03 14:12:19,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:19,691 INFO L225 Difference]: With dead ends: 131314 [2021-05-03 14:12:19,692 INFO L226 Difference]: Without dead ends: 131309 [2021-05-03 14:12:19,692 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 163.4ms TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:12:19,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131309 states. [2021-05-03 14:12:21,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131309 to 131072. [2021-05-03 14:12:22,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131072 states, 131071 states have (on average 3.024261659711149) internal successors, (396393), 131071 states have internal predecessors, (396393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:22,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131072 states to 131072 states and 396393 transitions. [2021-05-03 14:12:22,352 INFO L78 Accepts]: Start accepts. Automaton has 131072 states and 396393 transitions. Word has length 24 [2021-05-03 14:12:22,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:22,352 INFO L480 AbstractCegarLoop]: Abstraction has 131072 states and 396393 transitions. [2021-05-03 14:12:22,352 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) [2021-05-03 14:12:22,352 INFO L276 IsEmpty]: Start isEmpty. Operand 131072 states and 396393 transitions. [2021-05-03 14:12:22,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:12:22,405 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:22,405 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:22,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10607,312 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:22,606 INFO L428 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:22,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:22,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1561788372, now seen corresponding path program 311 times [2021-05-03 14:12:22,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:22,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676772271] [2021-05-03 14:12:22,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:22,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:22,696 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:12:22,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676772271] [2021-05-03 14:12:22,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204188501] [2021-05-03 14:12:22,696 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 [2021-05-03 14:12:22,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:12:22,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:22,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:12:22,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:12:22,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:22,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:12:22,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14212843] [2021-05-03 14:12:22,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:12:22,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:22,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:12:22,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:12:22,769 INFO L87 Difference]: Start difference. First operand 131072 states and 396393 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) [2021-05-03 14:12:23,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:23,847 INFO L93 Difference]: Finished difference Result 132743 states and 399958 transitions. [2021-05-03 14:12:23,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:12:23,848 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 24 [2021-05-03 14:12:23,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:24,184 INFO L225 Difference]: With dead ends: 132743 [2021-05-03 14:12:24,185 INFO L226 Difference]: Without dead ends: 132740 [2021-05-03 14:12:24,185 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 150.6ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:12:24,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132740 states. [2021-05-03 14:12:26,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132740 to 131072. [2021-05-03 14:12:26,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131072 states, 131071 states have (on average 3.0241853651837554) internal successors, (396383), 131071 states have internal predecessors, (396383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:26,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131072 states to 131072 states and 396383 transitions. [2021-05-03 14:12:26,986 INFO L78 Accepts]: Start accepts. Automaton has 131072 states and 396383 transitions. Word has length 24 [2021-05-03 14:12:26,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:26,986 INFO L480 AbstractCegarLoop]: Abstraction has 131072 states and 396383 transitions. [2021-05-03 14:12:26,986 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) [2021-05-03 14:12:26,986 INFO L276 IsEmpty]: Start isEmpty. Operand 131072 states and 396383 transitions. [2021-05-03 14:12:27,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:12:27,037 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:27,037 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:27,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10608,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:27,255 INFO L428 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:27,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:27,256 INFO L82 PathProgramCache]: Analyzing trace with hash -2004687512, now seen corresponding path program 312 times [2021-05-03 14:12:27,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:27,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502613539] [2021-05-03 14:12:27,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:27,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:27,384 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:27,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502613539] [2021-05-03 14:12:27,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78377607] [2021-05-03 14:12:27,385 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 [2021-05-03 14:12:27,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:12:27,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:27,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:12:27,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:27,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:27,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-05-03 14:12:27,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763613091] [2021-05-03 14:12:27,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:12:27,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:27,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:12:27,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:12:27,477 INFO L87 Difference]: Start difference. First operand 131072 states and 396383 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) [2021-05-03 14:12:28,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:28,153 INFO L93 Difference]: Finished difference Result 132748 states and 399952 transitions. [2021-05-03 14:12:28,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:12:28,154 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 24 [2021-05-03 14:12:28,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:28,942 INFO L225 Difference]: With dead ends: 132748 [2021-05-03 14:12:28,942 INFO L226 Difference]: Without dead ends: 132740 [2021-05-03 14:12:28,942 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 208.8ms TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:12:29,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132740 states. [2021-05-03 14:12:31,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132740 to 131124. [2021-05-03 14:12:31,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131124 states, 131123 states have (on average 3.0238097053911215) internal successors, (396491), 131123 states have internal predecessors, (396491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:31,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131124 states to 131124 states and 396491 transitions. [2021-05-03 14:12:31,832 INFO L78 Accepts]: Start accepts. Automaton has 131124 states and 396491 transitions. Word has length 24 [2021-05-03 14:12:31,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:31,833 INFO L480 AbstractCegarLoop]: Abstraction has 131124 states and 396491 transitions. [2021-05-03 14:12:31,833 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) [2021-05-03 14:12:31,833 INFO L276 IsEmpty]: Start isEmpty. Operand 131124 states and 396491 transitions. [2021-05-03 14:12:31,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:12:31,890 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:31,890 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:32,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10609,314 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:32,106 INFO L428 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:32,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:32,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1445308332, now seen corresponding path program 313 times [2021-05-03 14:12:32,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:32,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996090845] [2021-05-03 14:12:32,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:32,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:32,213 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:32,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996090845] [2021-05-03 14:12:32,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981354205] [2021-05-03 14:12:32,213 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 [2021-05-03 14:12:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:32,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:32,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:32,288 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:12:32,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:32,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-05-03 14:12:32,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93796891] [2021-05-03 14:12:32,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:12:32,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:32,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:12:32,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:12:32,289 INFO L87 Difference]: Start difference. First operand 131124 states and 396491 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) [2021-05-03 14:12:32,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:32,988 INFO L93 Difference]: Finished difference Result 131783 states and 397838 transitions. [2021-05-03 14:12:32,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:12:32,991 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 24 [2021-05-03 14:12:32,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:33,312 INFO L225 Difference]: With dead ends: 131783 [2021-05-03 14:12:33,312 INFO L226 Difference]: Without dead ends: 131778 [2021-05-03 14:12:33,312 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 198.5ms TimeCoverageRelationStatistics Valid=266, Invalid=604, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:12:34,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131778 states. [2021-05-03 14:12:35,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131778 to 131124. [2021-05-03 14:12:35,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131124 states, 131123 states have (on average 3.023794452536931) internal successors, (396489), 131123 states have internal predecessors, (396489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:36,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131124 states to 131124 states and 396489 transitions. [2021-05-03 14:12:36,632 INFO L78 Accepts]: Start accepts. Automaton has 131124 states and 396489 transitions. Word has length 24 [2021-05-03 14:12:36,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:36,632 INFO L480 AbstractCegarLoop]: Abstraction has 131124 states and 396489 transitions. [2021-05-03 14:12:36,632 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) [2021-05-03 14:12:36,632 INFO L276 IsEmpty]: Start isEmpty. Operand 131124 states and 396489 transitions. [2021-05-03 14:12:36,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:12:36,682 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:36,682 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:36,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10610,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:36,883 INFO L428 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:36,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:36,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1020997096, now seen corresponding path program 314 times [2021-05-03 14:12:36,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:36,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310718343] [2021-05-03 14:12:36,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:36,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:36,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310718343] [2021-05-03 14:12:36,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729824036] [2021-05-03 14:12:36,991 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 [2021-05-03 14:12:37,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:12:37,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:37,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:37,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 51 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:12:37,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:37,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-05-03 14:12:37,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224233012] [2021-05-03 14:12:37,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:12:37,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:37,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:12:37,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:12:37,069 INFO L87 Difference]: Start difference. First operand 131124 states and 396489 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) [2021-05-03 14:12:37,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:37,689 INFO L93 Difference]: Finished difference Result 131712 states and 397702 transitions. [2021-05-03 14:12:37,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:12:37,690 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 24 [2021-05-03 14:12:37,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:37,977 INFO L225 Difference]: With dead ends: 131712 [2021-05-03 14:12:37,977 INFO L226 Difference]: Without dead ends: 131706 [2021-05-03 14:12:37,978 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 185.6ms TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:12:38,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131706 states. [2021-05-03 14:12:40,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131706 to 131124. [2021-05-03 14:12:40,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131124 states, 131123 states have (on average 3.023779199682741) internal successors, (396487), 131123 states have internal predecessors, (396487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:41,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131124 states to 131124 states and 396487 transitions. [2021-05-03 14:12:41,264 INFO L78 Accepts]: Start accepts. Automaton has 131124 states and 396487 transitions. Word has length 24 [2021-05-03 14:12:41,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:41,264 INFO L480 AbstractCegarLoop]: Abstraction has 131124 states and 396487 transitions. [2021-05-03 14:12:41,264 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) [2021-05-03 14:12:41,264 INFO L276 IsEmpty]: Start isEmpty. Operand 131124 states and 396487 transitions. [2021-05-03 14:12:41,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:12:41,342 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:41,342 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:41,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10611,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:41,557 INFO L428 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:41,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:41,557 INFO L82 PathProgramCache]: Analyzing trace with hash -690466828, now seen corresponding path program 315 times [2021-05-03 14:12:41,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:41,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595682914] [2021-05-03 14:12:41,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:41,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:41,665 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:41,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595682914] [2021-05-03 14:12:41,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718746676] [2021-05-03 14:12:41,666 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 [2021-05-03 14:12:41,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:12:41,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:41,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:12:41,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:41,751 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:41,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:41,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-05-03 14:12:41,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014025283] [2021-05-03 14:12:41,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:12:41,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:41,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:12:41,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:12:41,751 INFO L87 Difference]: Start difference. First operand 131124 states and 396487 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) [2021-05-03 14:12:42,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:42,439 INFO L93 Difference]: Finished difference Result 131475 states and 397232 transitions. [2021-05-03 14:12:42,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:12:42,439 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 24 [2021-05-03 14:12:42,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:42,758 INFO L225 Difference]: With dead ends: 131475 [2021-05-03 14:12:42,758 INFO L226 Difference]: Without dead ends: 131470 [2021-05-03 14:12:42,758 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 201.1ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:12:42,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131470 states. [2021-05-03 14:12:45,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131470 to 131115. [2021-05-03 14:12:45,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131115 states, 131114 states have (on average 3.0236435468371035) internal successors, (396442), 131114 states have internal predecessors, (396442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:45,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131115 states to 131115 states and 396442 transitions. [2021-05-03 14:12:45,813 INFO L78 Accepts]: Start accepts. Automaton has 131115 states and 396442 transitions. Word has length 24 [2021-05-03 14:12:45,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:45,813 INFO L480 AbstractCegarLoop]: Abstraction has 131115 states and 396442 transitions. [2021-05-03 14:12:45,813 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) [2021-05-03 14:12:45,813 INFO L276 IsEmpty]: Start isEmpty. Operand 131115 states and 396442 transitions. [2021-05-03 14:12:45,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:12:45,868 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:45,868 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:46,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10612 [2021-05-03 14:12:46,083 INFO L428 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:46,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:46,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1053897178, now seen corresponding path program 316 times [2021-05-03 14:12:46,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:46,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890384373] [2021-05-03 14:12:46,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:46,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890384373] [2021-05-03 14:12:46,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894044733] [2021-05-03 14:12:46,191 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 [2021-05-03 14:12:46,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:12:46,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:46,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:46,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:46,949 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:12:46,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:46,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-05-03 14:12:46,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226910637] [2021-05-03 14:12:46,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:12:46,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:46,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:12:46,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:12:46,950 INFO L87 Difference]: Start difference. First operand 131115 states and 396442 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) [2021-05-03 14:12:48,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:48,112 INFO L93 Difference]: Finished difference Result 132301 states and 398883 transitions. [2021-05-03 14:12:48,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:12:48,113 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 24 [2021-05-03 14:12:48,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:48,455 INFO L225 Difference]: With dead ends: 132301 [2021-05-03 14:12:48,455 INFO L226 Difference]: Without dead ends: 132286 [2021-05-03 14:12:48,455 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 490.1ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:12:48,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132286 states. [2021-05-03 14:12:51,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132286 to 131160. [2021-05-03 14:12:51,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131160 states, 131159 states have (on average 3.023116980153859) internal successors, (396509), 131159 states have internal predecessors, (396509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:51,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131160 states to 131160 states and 396509 transitions. [2021-05-03 14:12:51,509 INFO L78 Accepts]: Start accepts. Automaton has 131160 states and 396509 transitions. Word has length 24 [2021-05-03 14:12:51,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:51,509 INFO L480 AbstractCegarLoop]: Abstraction has 131160 states and 396509 transitions. [2021-05-03 14:12:51,509 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) [2021-05-03 14:12:51,509 INFO L276 IsEmpty]: Start isEmpty. Operand 131160 states and 396509 transitions. [2021-05-03 14:12:51,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:12:51,560 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:51,560 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:51,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10613,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:51,761 INFO L428 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:51,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:51,761 INFO L82 PathProgramCache]: Analyzing trace with hash 629585942, now seen corresponding path program 317 times [2021-05-03 14:12:51,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:51,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029592464] [2021-05-03 14:12:51,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:51,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029592464] [2021-05-03 14:12:51,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068077572] [2021-05-03 14:12:51,883 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 [2021-05-03 14:12:51,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:12:51,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:51,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:51,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:51,965 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:12:51,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:51,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-05-03 14:12:51,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155158541] [2021-05-03 14:12:51,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:12:51,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:51,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:12:51,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:12:51,966 INFO L87 Difference]: Start difference. First operand 131160 states and 396509 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) [2021-05-03 14:12:53,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:53,082 INFO L93 Difference]: Finished difference Result 131749 states and 397717 transitions. [2021-05-03 14:12:53,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:12:53,083 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 24 [2021-05-03 14:12:53,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:53,390 INFO L225 Difference]: With dead ends: 131749 [2021-05-03 14:12:53,390 INFO L226 Difference]: Without dead ends: 131743 [2021-05-03 14:12:53,390 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 217.9ms TimeCoverageRelationStatistics Valid=266, Invalid=604, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:12:53,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131743 states. [2021-05-03 14:12:55,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131743 to 131160. [2021-05-03 14:12:55,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131160 states, 131159 states have (on average 3.023109355820035) internal successors, (396508), 131159 states have internal predecessors, (396508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:56,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131160 states to 131160 states and 396508 transitions. [2021-05-03 14:12:56,223 INFO L78 Accepts]: Start accepts. Automaton has 131160 states and 396508 transitions. Word has length 24 [2021-05-03 14:12:56,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:56,223 INFO L480 AbstractCegarLoop]: Abstraction has 131160 states and 396508 transitions. [2021-05-03 14:12:56,223 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) [2021-05-03 14:12:56,223 INFO L276 IsEmpty]: Start isEmpty. Operand 131160 states and 396508 transitions. [2021-05-03 14:12:56,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:12:56,276 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:56,276 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:56,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10614 [2021-05-03 14:12:56,489 INFO L428 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:56,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:56,489 INFO L82 PathProgramCache]: Analyzing trace with hash -89034798, now seen corresponding path program 318 times [2021-05-03 14:12:56,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:56,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789139240] [2021-05-03 14:12:56,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:56,556 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 38 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:12:56,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789139240] [2021-05-03 14:12:56,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531829903] [2021-05-03 14:12:56,556 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 [2021-05-03 14:12:56,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:12:56,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:56,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:56,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:56,627 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:12:56,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:56,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-03 14:12:56,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502555407] [2021-05-03 14:12:56,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:12:56,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:56,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:12:56,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:12:56,628 INFO L87 Difference]: Start difference. First operand 131160 states and 396508 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) [2021-05-03 14:12:57,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:57,609 INFO L93 Difference]: Finished difference Result 131436 states and 396919 transitions. [2021-05-03 14:12:57,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:12:57,610 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 24 [2021-05-03 14:12:57,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:57,935 INFO L225 Difference]: With dead ends: 131436 [2021-05-03 14:12:57,935 INFO L226 Difference]: Without dead ends: 131434 [2021-05-03 14:12:57,935 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:12:58,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131434 states. [2021-05-03 14:13:00,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131434 to 131152. [2021-05-03 14:13:00,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131152 states, 131151 states have (on average 3.0228438974922036) internal successors, (396449), 131151 states have internal predecessors, (396449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:00,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131152 states to 131152 states and 396449 transitions. [2021-05-03 14:13:00,977 INFO L78 Accepts]: Start accepts. Automaton has 131152 states and 396449 transitions. Word has length 24 [2021-05-03 14:13:00,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:00,977 INFO L480 AbstractCegarLoop]: Abstraction has 131152 states and 396449 transitions. [2021-05-03 14:13:00,978 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) [2021-05-03 14:13:00,978 INFO L276 IsEmpty]: Start isEmpty. Operand 131152 states and 396449 transitions. [2021-05-03 14:13:01,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:13:01,034 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:01,034 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:01,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10615 [2021-05-03 14:13:01,249 INFO L428 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:01,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:01,250 INFO L82 PathProgramCache]: Analyzing trace with hash 561470900, now seen corresponding path program 319 times [2021-05-03 14:13:01,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:01,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607295388] [2021-05-03 14:13:01,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:01,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:01,350 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:13:01,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607295388] [2021-05-03 14:13:01,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330711735] [2021-05-03 14:13:01,351 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 [2021-05-03 14:13:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:01,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:13:01,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:13:01,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:01,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2021-05-03 14:13:01,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071075466] [2021-05-03 14:13:01,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:13:01,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:01,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:13:01,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:13:01,422 INFO L87 Difference]: Start difference. First operand 131152 states and 396449 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) [2021-05-03 14:13:02,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:02,104 INFO L93 Difference]: Finished difference Result 131396 states and 396804 transitions. [2021-05-03 14:13:02,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:13:02,105 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 24 [2021-05-03 14:13:02,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:02,446 INFO L225 Difference]: With dead ends: 131396 [2021-05-03 14:13:02,446 INFO L226 Difference]: Without dead ends: 131393 [2021-05-03 14:13:02,446 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 155.5ms TimeCoverageRelationStatistics Valid=214, Invalid=436, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:13:03,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131393 states. [2021-05-03 14:13:05,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131393 to 131141. [2021-05-03 14:13:05,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131141 states, 131140 states have (on average 3.0221976513649533) internal successors, (396331), 131140 states have internal predecessors, (396331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:06,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131141 states to 131141 states and 396331 transitions. [2021-05-03 14:13:06,757 INFO L78 Accepts]: Start accepts. Automaton has 131141 states and 396331 transitions. Word has length 24 [2021-05-03 14:13:06,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:06,757 INFO L480 AbstractCegarLoop]: Abstraction has 131141 states and 396331 transitions. [2021-05-03 14:13:06,757 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) [2021-05-03 14:13:06,757 INFO L276 IsEmpty]: Start isEmpty. Operand 131141 states and 396331 transitions. [2021-05-03 14:13:06,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:13:06,812 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:06,812 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:07,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10616,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:07,028 INFO L428 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:07,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:07,028 INFO L82 PathProgramCache]: Analyzing trace with hash -511614480, now seen corresponding path program 320 times [2021-05-03 14:13:07,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:07,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741809681] [2021-05-03 14:13:07,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:07,119 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:07,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741809681] [2021-05-03 14:13:07,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127626265] [2021-05-03 14:13:07,120 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 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 [2021-05-03 14:13:07,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:13:07,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:07,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:13:07,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:13:07,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:07,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-05-03 14:13:07,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086604021] [2021-05-03 14:13:07,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:13:07,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:07,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:13:07,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:13:07,197 INFO L87 Difference]: Start difference. First operand 131141 states and 396331 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) [2021-05-03 14:13:07,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:07,950 INFO L93 Difference]: Finished difference Result 131390 states and 396692 transitions. [2021-05-03 14:13:07,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:13:07,965 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 24 [2021-05-03 14:13:07,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:08,310 INFO L225 Difference]: With dead ends: 131390 [2021-05-03 14:13:08,310 INFO L226 Difference]: Without dead ends: 131385 [2021-05-03 14:13:08,310 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 164.7ms TimeCoverageRelationStatistics Valid=243, Invalid=513, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:13:08,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131385 states. [2021-05-03 14:13:10,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131385 to 131141. [2021-05-03 14:13:11,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131141 states, 131140 states have (on average 3.0206191856031723) internal successors, (396124), 131140 states have internal predecessors, (396124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:11,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131141 states to 131141 states and 396124 transitions. [2021-05-03 14:13:11,493 INFO L78 Accepts]: Start accepts. Automaton has 131141 states and 396124 transitions. Word has length 24 [2021-05-03 14:13:11,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:11,493 INFO L480 AbstractCegarLoop]: Abstraction has 131141 states and 396124 transitions. [2021-05-03 14:13:11,493 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) [2021-05-03 14:13:11,493 INFO L276 IsEmpty]: Start isEmpty. Operand 131141 states and 396124 transitions. [2021-05-03 14:13:11,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:13:11,543 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:11,543 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:11,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10617,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:11,743 INFO L428 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:11,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:11,744 INFO L82 PathProgramCache]: Analyzing trace with hash 582477108, now seen corresponding path program 321 times [2021-05-03 14:13:11,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:11,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350092299] [2021-05-03 14:13:11,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:11,836 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:11,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350092299] [2021-05-03 14:13:11,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003242148] [2021-05-03 14:13:11,836 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 [2021-05-03 14:13:11,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:13:11,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:11,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:13:11,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:12,331 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:12,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:12,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-05-03 14:13:12,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804678343] [2021-05-03 14:13:12,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:13:12,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:12,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:13:12,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:13:12,332 INFO L87 Difference]: Start difference. First operand 131141 states and 396124 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) [2021-05-03 14:13:13,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:13,121 INFO L93 Difference]: Finished difference Result 133913 states and 402552 transitions. [2021-05-03 14:13:13,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:13:13,122 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 24 [2021-05-03 14:13:13,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:13,473 INFO L225 Difference]: With dead ends: 133913 [2021-05-03 14:13:13,473 INFO L226 Difference]: Without dead ends: 133910 [2021-05-03 14:13:13,474 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 184.3ms TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:13:13,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133910 states. [2021-05-03 14:13:16,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133910 to 131141. [2021-05-03 14:13:16,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131141 states, 131140 states have (on average 3.020283666310813) internal successors, (396080), 131140 states have internal predecessors, (396080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131141 states to 131141 states and 396080 transitions. [2021-05-03 14:13:16,775 INFO L78 Accepts]: Start accepts. Automaton has 131141 states and 396080 transitions. Word has length 24 [2021-05-03 14:13:16,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:16,776 INFO L480 AbstractCegarLoop]: Abstraction has 131141 states and 396080 transitions. [2021-05-03 14:13:16,776 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) [2021-05-03 14:13:16,776 INFO L276 IsEmpty]: Start isEmpty. Operand 131141 states and 396080 transitions. [2021-05-03 14:13:16,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:13:16,829 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:16,829 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:17,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10618,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:17,037 INFO L428 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:17,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:17,037 INFO L82 PathProgramCache]: Analyzing trace with hash 139577968, now seen corresponding path program 322 times [2021-05-03 14:13:17,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:17,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910991862] [2021-05-03 14:13:17,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:17,135 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:13:17,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910991862] [2021-05-03 14:13:17,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498714560] [2021-05-03 14:13:17,135 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 [2021-05-03 14:13:17,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:13:17,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:17,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:13:17,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:17,216 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:13:17,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:17,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-05-03 14:13:17,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33097224] [2021-05-03 14:13:17,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:13:17,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:17,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:13:17,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:13:17,217 INFO L87 Difference]: Start difference. First operand 131141 states and 396080 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) [2021-05-03 14:13:18,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:18,481 INFO L93 Difference]: Finished difference Result 132975 states and 400018 transitions. [2021-05-03 14:13:18,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:13:18,482 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 24 [2021-05-03 14:13:18,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:18,858 INFO L225 Difference]: With dead ends: 132975 [2021-05-03 14:13:18,858 INFO L226 Difference]: Without dead ends: 132971 [2021-05-03 14:13:18,859 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 180.4ms TimeCoverageRelationStatistics Valid=233, Invalid=523, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:13:18,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132971 states. [2021-05-03 14:13:21,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132971 to 131141. [2021-05-03 14:13:21,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131141 states, 131140 states have (on average 3.020253164556962) internal successors, (396076), 131140 states have internal predecessors, (396076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:22,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131141 states to 131141 states and 396076 transitions. [2021-05-03 14:13:22,044 INFO L78 Accepts]: Start accepts. Automaton has 131141 states and 396076 transitions. Word has length 24 [2021-05-03 14:13:22,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:22,044 INFO L480 AbstractCegarLoop]: Abstraction has 131141 states and 396076 transitions. [2021-05-03 14:13:22,044 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) [2021-05-03 14:13:22,045 INFO L276 IsEmpty]: Start isEmpty. Operand 131141 states and 396076 transitions. [2021-05-03 14:13:22,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:13:22,101 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:22,101 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:22,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10619 [2021-05-03 14:13:22,317 INFO L428 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:22,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:22,317 INFO L82 PathProgramCache]: Analyzing trace with hash -705393484, now seen corresponding path program 323 times [2021-05-03 14:13:22,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:22,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045531884] [2021-05-03 14:13:22,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:22,429 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:22,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045531884] [2021-05-03 14:13:22,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808318941] [2021-05-03 14:13:22,429 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 [2021-05-03 14:13:22,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:13:22,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:22,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:13:22,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:13:22,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:22,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-05-03 14:13:22,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538630181] [2021-05-03 14:13:22,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:13:22,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:22,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:13:22,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:13:22,516 INFO L87 Difference]: Start difference. First operand 131141 states and 396076 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) [2021-05-03 14:13:23,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:23,939 INFO L93 Difference]: Finished difference Result 132986 states and 400023 transitions. [2021-05-03 14:13:23,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:13:23,940 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 24 [2021-05-03 14:13:23,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:24,277 INFO L225 Difference]: With dead ends: 132986 [2021-05-03 14:13:24,277 INFO L226 Difference]: Without dead ends: 132971 [2021-05-03 14:13:24,277 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 326.9ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:13:24,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132971 states. [2021-05-03 14:13:26,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132971 to 131201. [2021-05-03 14:13:26,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131201 states, 131200 states have (on average 3.0197713414634144) internal successors, (396194), 131200 states have internal predecessors, (396194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:27,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131201 states to 131201 states and 396194 transitions. [2021-05-03 14:13:27,354 INFO L78 Accepts]: Start accepts. Automaton has 131201 states and 396194 transitions. Word has length 24 [2021-05-03 14:13:27,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:27,354 INFO L480 AbstractCegarLoop]: Abstraction has 131201 states and 396194 transitions. [2021-05-03 14:13:27,354 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) [2021-05-03 14:13:27,355 INFO L276 IsEmpty]: Start isEmpty. Operand 131201 states and 396194 transitions. [2021-05-03 14:13:27,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:13:27,412 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:27,412 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:27,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10620,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:27,627 INFO L428 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:27,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:27,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1129704720, now seen corresponding path program 324 times [2021-05-03 14:13:27,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:27,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930996674] [2021-05-03 14:13:27,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:27,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930996674] [2021-05-03 14:13:27,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783392639] [2021-05-03 14:13:27,744 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 [2021-05-03 14:13:27,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:13:27,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:27,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:13:27,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:27,819 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:27,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:27,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-05-03 14:13:27,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678443018] [2021-05-03 14:13:27,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:13:27,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:27,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:13:27,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:13:27,820 INFO L87 Difference]: Start difference. First operand 131201 states and 396194 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) [2021-05-03 14:13:29,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:29,086 INFO L93 Difference]: Finished difference Result 131929 states and 397683 transitions. [2021-05-03 14:13:29,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:13:29,101 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 24 [2021-05-03 14:13:29,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:29,440 INFO L225 Difference]: With dead ends: 131929 [2021-05-03 14:13:29,441 INFO L226 Difference]: Without dead ends: 131923 [2021-05-03 14:13:29,441 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 206.0ms TimeCoverageRelationStatistics Valid=266, Invalid=604, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:13:29,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131923 states. [2021-05-03 14:13:31,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131923 to 131201. [2021-05-03 14:13:31,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131201 states, 131200 states have (on average 3.019763719512195) internal successors, (396193), 131200 states have internal predecessors, (396193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:32,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131201 states to 131201 states and 396193 transitions. [2021-05-03 14:13:32,149 INFO L78 Accepts]: Start accepts. Automaton has 131201 states and 396193 transitions. Word has length 24 [2021-05-03 14:13:32,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:32,149 INFO L480 AbstractCegarLoop]: Abstraction has 131201 states and 396193 transitions. [2021-05-03 14:13:32,149 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) [2021-05-03 14:13:32,149 INFO L276 IsEmpty]: Start isEmpty. Operand 131201 states and 396193 transitions. [2021-05-03 14:13:32,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:13:32,191 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:32,191 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:32,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10621 [2021-05-03 14:13:32,392 INFO L428 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:32,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:32,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1398451148, now seen corresponding path program 325 times [2021-05-03 14:13:32,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:32,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507361450] [2021-05-03 14:13:32,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:32,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:32,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507361450] [2021-05-03 14:13:32,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982121864] [2021-05-03 14:13:32,510 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 [2021-05-03 14:13:32,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:32,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:13:32,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:32,572 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:13:32,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:32,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-05-03 14:13:32,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034875634] [2021-05-03 14:13:32,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:13:32,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:32,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:13:32,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:13:32,573 INFO L87 Difference]: Start difference. First operand 131201 states and 396193 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) [2021-05-03 14:13:33,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:33,200 INFO L93 Difference]: Finished difference Result 131858 states and 397549 transitions. [2021-05-03 14:13:33,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:13:33,201 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 24 [2021-05-03 14:13:33,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:33,501 INFO L225 Difference]: With dead ends: 131858 [2021-05-03 14:13:33,501 INFO L226 Difference]: Without dead ends: 131851 [2021-05-03 14:13:33,501 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 201.0ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:13:34,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131851 states. [2021-05-03 14:13:36,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131851 to 131201. [2021-05-03 14:13:36,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131201 states, 131200 states have (on average 3.0197560975609754) internal successors, (396192), 131200 states have internal predecessors, (396192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:36,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131201 states to 131201 states and 396192 transitions. [2021-05-03 14:13:36,556 INFO L78 Accepts]: Start accepts. Automaton has 131201 states and 396192 transitions. Word has length 24 [2021-05-03 14:13:36,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:36,556 INFO L480 AbstractCegarLoop]: Abstraction has 131201 states and 396192 transitions. [2021-05-03 14:13:36,556 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) [2021-05-03 14:13:36,556 INFO L276 IsEmpty]: Start isEmpty. Operand 131201 states and 396192 transitions. [2021-05-03 14:13:36,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:13:36,599 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:36,599 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:36,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10622 [2021-05-03 14:13:36,800 INFO L428 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:36,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:36,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1057585994, now seen corresponding path program 326 times [2021-05-03 14:13:36,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:36,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553373575] [2021-05-03 14:13:36,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:36,901 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:13:36,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553373575] [2021-05-03 14:13:36,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44734993] [2021-05-03 14:13:36,901 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 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:13:36,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:13:36,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:36,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:13:36,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:36,992 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 61 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:13:36,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:36,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:13:36,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280540950] [2021-05-03 14:13:36,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:13:36,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:36,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:13:36,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:13:36,992 INFO L87 Difference]: Start difference. First operand 131201 states and 396192 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) [2021-05-03 14:13:37,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:37,648 INFO L93 Difference]: Finished difference Result 131376 states and 396488 transitions. [2021-05-03 14:13:37,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:13:37,649 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 24 [2021-05-03 14:13:37,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:37,956 INFO L225 Difference]: With dead ends: 131376 [2021-05-03 14:13:37,956 INFO L226 Difference]: Without dead ends: 131372 [2021-05-03 14:13:37,956 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 159.8ms TimeCoverageRelationStatistics Valid=214, Invalid=386, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:13:38,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131372 states. [2021-05-03 14:13:40,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131372 to 131153. [2021-05-03 14:13:40,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131153 states, 131152 states have (on average 3.0198014517506406) internal successors, (396053), 131152 states have internal predecessors, (396053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:41,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131153 states to 131153 states and 396053 transitions. [2021-05-03 14:13:41,420 INFO L78 Accepts]: Start accepts. Automaton has 131153 states and 396053 transitions. Word has length 24 [2021-05-03 14:13:41,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:41,420 INFO L480 AbstractCegarLoop]: Abstraction has 131153 states and 396053 transitions. [2021-05-03 14:13:41,420 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) [2021-05-03 14:13:41,420 INFO L276 IsEmpty]: Start isEmpty. Operand 131153 states and 396053 transitions. [2021-05-03 14:13:41,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:13:41,466 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:41,466 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:41,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10623,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:41,667 INFO L428 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:41,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:41,668 INFO L82 PathProgramCache]: Analyzing trace with hash 257571116, now seen corresponding path program 327 times [2021-05-03 14:13:41,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:41,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981135452] [2021-05-03 14:13:41,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:41,759 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 26 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:13:41,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981135452] [2021-05-03 14:13:41,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922564479] [2021-05-03 14:13:41,759 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 [2021-05-03 14:13:41,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:13:41,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:41,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:13:41,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:41,840 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 27 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:13:41,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:41,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:13:41,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643687900] [2021-05-03 14:13:41,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:13:41,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:41,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:13:41,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:13:41,841 INFO L87 Difference]: Start difference. First operand 131153 states and 396053 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) [2021-05-03 14:13:42,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:42,508 INFO L93 Difference]: Finished difference Result 131624 states and 397009 transitions. [2021-05-03 14:13:42,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:13:42,509 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 24 [2021-05-03 14:13:42,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:42,858 INFO L225 Difference]: With dead ends: 131624 [2021-05-03 14:13:42,858 INFO L226 Difference]: Without dead ends: 131621 [2021-05-03 14:13:42,858 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 158.3ms TimeCoverageRelationStatistics Valid=203, Invalid=447, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:13:42,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131621 states. [2021-05-03 14:13:45,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131621 to 131141. [2021-05-03 14:13:46,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131141 states, 131140 states have (on average 3.0196278786030195) internal successors, (395994), 131140 states have internal predecessors, (395994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:46,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131141 states to 131141 states and 395994 transitions. [2021-05-03 14:13:46,439 INFO L78 Accepts]: Start accepts. Automaton has 131141 states and 395994 transitions. Word has length 24 [2021-05-03 14:13:46,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:46,439 INFO L480 AbstractCegarLoop]: Abstraction has 131141 states and 395994 transitions. [2021-05-03 14:13:46,439 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) [2021-05-03 14:13:46,439 INFO L276 IsEmpty]: Start isEmpty. Operand 131141 states and 395994 transitions. [2021-05-03 14:13:46,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:13:46,957 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:46,957 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:47,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10624 [2021-05-03 14:13:47,172 INFO L428 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:47,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:47,172 INFO L82 PathProgramCache]: Analyzing trace with hash -185328024, now seen corresponding path program 328 times [2021-05-03 14:13:47,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:47,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063250416] [2021-05-03 14:13:47,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:47,284 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:47,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063250416] [2021-05-03 14:13:47,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057078837] [2021-05-03 14:13:47,285 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 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 [2021-05-03 14:13:47,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:13:47,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:47,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:13:47,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:47,362 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 39 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:13:47,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:47,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-05-03 14:13:47,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605028829] [2021-05-03 14:13:47,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:13:47,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:47,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:13:47,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:13:47,363 INFO L87 Difference]: Start difference. First operand 131141 states and 395994 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) [2021-05-03 14:13:48,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:48,052 INFO L93 Difference]: Finished difference Result 131617 states and 396954 transitions. [2021-05-03 14:13:48,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:13:48,053 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 24 [2021-05-03 14:13:48,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:48,390 INFO L225 Difference]: With dead ends: 131617 [2021-05-03 14:13:48,390 INFO L226 Difference]: Without dead ends: 131609 [2021-05-03 14:13:48,391 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 180.2ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:13:48,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131609 states. [2021-05-03 14:13:51,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131609 to 131143. [2021-05-03 14:13:51,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131143 states, 131142 states have (on average 3.01929969041192) internal successors, (395957), 131142 states have internal predecessors, (395957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:51,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131143 states to 131143 states and 395957 transitions. [2021-05-03 14:13:51,794 INFO L78 Accepts]: Start accepts. Automaton has 131143 states and 395957 transitions. Word has length 24 [2021-05-03 14:13:51,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:51,795 INFO L480 AbstractCegarLoop]: Abstraction has 131143 states and 395957 transitions. [2021-05-03 14:13:51,795 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) [2021-05-03 14:13:51,795 INFO L276 IsEmpty]: Start isEmpty. Operand 131143 states and 395957 transitions. [2021-05-03 14:13:51,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:13:51,853 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:51,853 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:52,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10625,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:52,069 INFO L428 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:52,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:52,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1030299476, now seen corresponding path program 329 times [2021-05-03 14:13:52,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:52,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406252829] [2021-05-03 14:13:52,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:52,256 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:52,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406252829] [2021-05-03 14:13:52,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583613421] [2021-05-03 14:13:52,256 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 [2021-05-03 14:13:52,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:13:52,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:52,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:13:52,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:52,329 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:13:52,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:52,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-05-03 14:13:52,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606776955] [2021-05-03 14:13:52,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:13:52,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:52,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:13:52,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:13:52,330 INFO L87 Difference]: Start difference. First operand 131143 states and 395957 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) [2021-05-03 14:13:53,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:53,522 INFO L93 Difference]: Finished difference Result 131841 states and 397374 transitions. [2021-05-03 14:13:53,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:13:53,523 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 24 [2021-05-03 14:13:53,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:53,859 INFO L225 Difference]: With dead ends: 131841 [2021-05-03 14:13:53,859 INFO L226 Difference]: Without dead ends: 131836 [2021-05-03 14:13:53,859 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 262.4ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:13:53,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131836 states. [2021-05-03 14:13:56,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131836 to 131145. [2021-05-03 14:13:56,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131145 states, 131144 states have (on average 3.0192765204660525) internal successors, (395960), 131144 states have internal predecessors, (395960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:57,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131145 states to 131145 states and 395960 transitions. [2021-05-03 14:13:57,154 INFO L78 Accepts]: Start accepts. Automaton has 131145 states and 395960 transitions. Word has length 24 [2021-05-03 14:13:57,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:57,154 INFO L480 AbstractCegarLoop]: Abstraction has 131145 states and 395960 transitions. [2021-05-03 14:13:57,154 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) [2021-05-03 14:13:57,154 INFO L276 IsEmpty]: Start isEmpty. Operand 131145 states and 395960 transitions. [2021-05-03 14:13:57,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:13:57,212 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:57,212 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:57,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10626 [2021-05-03 14:13:57,425 INFO L428 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:57,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:57,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1454610712, now seen corresponding path program 330 times [2021-05-03 14:13:57,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:57,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723575190] [2021-05-03 14:13:57,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:57,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:57,553 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:57,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723575190] [2021-05-03 14:13:57,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912076643] [2021-05-03 14:13:57,553 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) [2021-05-03 14:13:57,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:13:57,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:57,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:13:57,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:57,639 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:13:57,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:57,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-05-03 14:13:57,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401299051] [2021-05-03 14:13:57,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:13:57,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:57,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:13:57,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:13:57,640 INFO L87 Difference]: Start difference. First operand 131145 states and 395960 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) [2021-05-03 14:13:58,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:58,813 INFO L93 Difference]: Finished difference Result 131823 states and 397349 transitions. [2021-05-03 14:13:58,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:13:58,814 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 24 [2021-05-03 14:13:58,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:59,199 INFO L225 Difference]: With dead ends: 131823 [2021-05-03 14:13:59,199 INFO L226 Difference]: Without dead ends: 131817 [2021-05-03 14:13:59,199 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 213.6ms TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:13:59,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131817 states. [2021-05-03 14:14:01,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131817 to 131145. [2021-05-03 14:14:01,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131145 states, 131144 states have (on average 3.019253644848411) internal successors, (395957), 131144 states have internal predecessors, (395957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:02,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131145 states to 131145 states and 395957 transitions. [2021-05-03 14:14:02,258 INFO L78 Accepts]: Start accepts. Automaton has 131145 states and 395957 transitions. Word has length 24 [2021-05-03 14:14:02,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:02,258 INFO L480 AbstractCegarLoop]: Abstraction has 131145 states and 395957 transitions. [2021-05-03 14:14:02,258 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) [2021-05-03 14:14:02,259 INFO L276 IsEmpty]: Start isEmpty. Operand 131145 states and 395957 transitions. [2021-05-03 14:14:02,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:14:02,310 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:02,310 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:02,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10627,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:02,525 INFO L428 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:02,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:02,525 INFO L82 PathProgramCache]: Analyzing trace with hash 266264850, now seen corresponding path program 331 times [2021-05-03 14:14:02,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:02,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505533503] [2021-05-03 14:14:02,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:02,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:02,632 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:02,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505533503] [2021-05-03 14:14:02,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619407982] [2021-05-03 14:14:02,632 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 [2021-05-03 14:14:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:02,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:14:02,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:14:02,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:02,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-05-03 14:14:02,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210979194] [2021-05-03 14:14:02,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:14:02,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:02,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:14:02,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:14:02,695 INFO L87 Difference]: Start difference. First operand 131145 states and 395957 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) [2021-05-03 14:14:04,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:04,161 INFO L93 Difference]: Finished difference Result 131611 states and 396867 transitions. [2021-05-03 14:14:04,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:14:04,173 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 24 [2021-05-03 14:14:04,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:04,563 INFO L225 Difference]: With dead ends: 131611 [2021-05-03 14:14:04,563 INFO L226 Difference]: Without dead ends: 131596 [2021-05-03 14:14:04,563 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 202.9ms TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:14:04,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131596 states. [2021-05-03 14:14:06,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131596 to 131179. [2021-05-03 14:14:07,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131179 states, 131178 states have (on average 3.0187988839592004) internal successors, (396000), 131178 states have internal predecessors, (396000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:07,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131179 states to 131179 states and 396000 transitions. [2021-05-03 14:14:07,617 INFO L78 Accepts]: Start accepts. Automaton has 131179 states and 396000 transitions. Word has length 24 [2021-05-03 14:14:07,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:07,617 INFO L480 AbstractCegarLoop]: Abstraction has 131179 states and 396000 transitions. [2021-05-03 14:14:07,617 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) [2021-05-03 14:14:07,617 INFO L276 IsEmpty]: Start isEmpty. Operand 131179 states and 396000 transitions. [2021-05-03 14:14:07,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:14:07,670 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:07,670 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:07,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10628,333 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:07,886 INFO L428 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:07,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:07,886 INFO L82 PathProgramCache]: Analyzing trace with hash -158046386, now seen corresponding path program 332 times [2021-05-03 14:14:07,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:07,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999509937] [2021-05-03 14:14:07,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:07,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:08,006 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:08,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999509937] [2021-05-03 14:14:08,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774503758] [2021-05-03 14:14:08,007 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 [2021-05-03 14:14:08,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:14:08,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:14:08,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:14:08,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:14:08,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:08,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-05-03 14:14:08,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361301712] [2021-05-03 14:14:08,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:14:08,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:08,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:14:08,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:14:08,077 INFO L87 Difference]: Start difference. First operand 131179 states and 396000 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) [2021-05-03 14:14:08,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:08,867 INFO L93 Difference]: Finished difference Result 132080 states and 397867 transitions. [2021-05-03 14:14:08,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:14:08,867 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 24 [2021-05-03 14:14:08,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:09,835 INFO L225 Difference]: With dead ends: 132080 [2021-05-03 14:14:09,835 INFO L226 Difference]: Without dead ends: 132074 [2021-05-03 14:14:09,835 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 248.9ms TimeCoverageRelationStatistics Valid=324, Invalid=732, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:14:09,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132074 states. [2021-05-03 14:14:12,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132074 to 131189. [2021-05-03 14:14:12,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131189 states, 131188 states have (on average 3.018713601853828) internal successors, (396019), 131188 states have internal predecessors, (396019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:12,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131189 states to 131189 states and 396019 transitions. [2021-05-03 14:14:12,866 INFO L78 Accepts]: Start accepts. Automaton has 131189 states and 396019 transitions. Word has length 24 [2021-05-03 14:14:12,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:12,866 INFO L480 AbstractCegarLoop]: Abstraction has 131189 states and 396019 transitions. [2021-05-03 14:14:12,866 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) [2021-05-03 14:14:12,866 INFO L276 IsEmpty]: Start isEmpty. Operand 131189 states and 396019 transitions. [2021-05-03 14:14:12,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:14:12,916 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:12,916 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:13,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10629,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:13,117 INFO L428 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:13,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:13,117 INFO L82 PathProgramCache]: Analyzing trace with hash -205155220, now seen corresponding path program 333 times [2021-05-03 14:14:13,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:13,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257593316] [2021-05-03 14:14:13,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:13,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:13,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257593316] [2021-05-03 14:14:13,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368842575] [2021-05-03 14:14:13,237 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 [2021-05-03 14:14:13,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:14:13,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:14:13,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:14:13,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:13,305 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:13,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:13,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-05-03 14:14:13,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219404400] [2021-05-03 14:14:13,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:14:13,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:13,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:14:13,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:14:13,306 INFO L87 Difference]: Start difference. First operand 131189 states and 396019 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) [2021-05-03 14:14:14,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:14,501 INFO L93 Difference]: Finished difference Result 131602 states and 396804 transitions. [2021-05-03 14:14:14,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:14:14,502 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 24 [2021-05-03 14:14:14,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:14,802 INFO L225 Difference]: With dead ends: 131602 [2021-05-03 14:14:14,802 INFO L226 Difference]: Without dead ends: 131599 [2021-05-03 14:14:14,802 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 184.9ms TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:14:14,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131599 states. [2021-05-03 14:14:17,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131599 to 131169. [2021-05-03 14:14:17,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131169 states, 131168 states have (on average 3.0181675408636255) internal successors, (395887), 131168 states have internal predecessors, (395887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:17,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131169 states to 131169 states and 395887 transitions. [2021-05-03 14:14:17,542 INFO L78 Accepts]: Start accepts. Automaton has 131169 states and 395887 transitions. Word has length 24 [2021-05-03 14:14:17,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:17,542 INFO L480 AbstractCegarLoop]: Abstraction has 131169 states and 395887 transitions. [2021-05-03 14:14:17,542 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) [2021-05-03 14:14:17,542 INFO L276 IsEmpty]: Start isEmpty. Operand 131169 states and 395887 transitions. [2021-05-03 14:14:17,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:14:17,596 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:17,596 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:17,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10630 [2021-05-03 14:14:17,797 INFO L428 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:17,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:17,797 INFO L82 PathProgramCache]: Analyzing trace with hash -648054360, now seen corresponding path program 334 times [2021-05-03 14:14:17,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:17,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662978781] [2021-05-03 14:14:17,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:17,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:17,887 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:14:17,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662978781] [2021-05-03 14:14:17,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628652295] [2021-05-03 14:14:17,887 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 [2021-05-03 14:14:17,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:14:17,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:14:17,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:14:17,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:17,950 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:14:17,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:17,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-05-03 14:14:17,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274178139] [2021-05-03 14:14:17,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:14:17,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:17,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:14:17,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:14:17,950 INFO L87 Difference]: Start difference. First operand 131169 states and 395887 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) [2021-05-03 14:14:19,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:19,093 INFO L93 Difference]: Finished difference Result 132909 states and 399521 transitions. [2021-05-03 14:14:19,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:14:19,094 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 24 [2021-05-03 14:14:19,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:19,379 INFO L225 Difference]: With dead ends: 132909 [2021-05-03 14:14:19,379 INFO L226 Difference]: Without dead ends: 132901 [2021-05-03 14:14:19,379 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 161.1ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:14:19,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132901 states. [2021-05-03 14:14:21,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132901 to 131188. [2021-05-03 14:14:21,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131188 states, 131187 states have (on average 3.0180734371545963) internal successors, (395932), 131187 states have internal predecessors, (395932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:21,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131188 states to 131188 states and 395932 transitions. [2021-05-03 14:14:21,986 INFO L78 Accepts]: Start accepts. Automaton has 131188 states and 395932 transitions. Word has length 24 [2021-05-03 14:14:21,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:21,986 INFO L480 AbstractCegarLoop]: Abstraction has 131188 states and 395932 transitions. [2021-05-03 14:14:21,987 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) [2021-05-03 14:14:21,987 INFO L276 IsEmpty]: Start isEmpty. Operand 131188 states and 395932 transitions. [2021-05-03 14:14:22,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:14:22,038 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:22,038 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:22,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10631,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:22,239 INFO L428 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:22,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:22,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1493025812, now seen corresponding path program 335 times [2021-05-03 14:14:22,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:22,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983568710] [2021-05-03 14:14:22,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:22,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:22,360 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:22,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983568710] [2021-05-03 14:14:22,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357257874] [2021-05-03 14:14:22,360 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 [2021-05-03 14:14:22,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:14:22,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:14:22,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:14:22,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:14:22,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:22,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-05-03 14:14:22,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357628904] [2021-05-03 14:14:22,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:14:22,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:22,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:14:22,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:14:22,427 INFO L87 Difference]: Start difference. First operand 131188 states and 395932 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) [2021-05-03 14:14:23,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:23,107 INFO L93 Difference]: Finished difference Result 132917 states and 399522 transitions. [2021-05-03 14:14:23,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:14:23,108 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 24 [2021-05-03 14:14:23,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:23,423 INFO L225 Difference]: With dead ends: 132917 [2021-05-03 14:14:23,424 INFO L226 Difference]: Without dead ends: 132902 [2021-05-03 14:14:23,424 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 212.5ms TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:14:24,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132902 states. [2021-05-03 14:14:26,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132902 to 131226. [2021-05-03 14:14:26,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131226 states, 131225 states have (on average 3.017854829491332) internal successors, (396018), 131225 states have internal predecessors, (396018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:26,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131226 states to 131226 states and 396018 transitions. [2021-05-03 14:14:26,647 INFO L78 Accepts]: Start accepts. Automaton has 131226 states and 396018 transitions. Word has length 24 [2021-05-03 14:14:26,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:26,647 INFO L480 AbstractCegarLoop]: Abstraction has 131226 states and 396018 transitions. [2021-05-03 14:14:26,647 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) [2021-05-03 14:14:26,647 INFO L276 IsEmpty]: Start isEmpty. Operand 131226 states and 396018 transitions. [2021-05-03 14:14:26,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:14:26,697 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:26,697 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:26,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10632 [2021-05-03 14:14:26,897 INFO L428 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:26,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:26,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1917337048, now seen corresponding path program 336 times [2021-05-03 14:14:26,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:26,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108824933] [2021-05-03 14:14:26,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:26,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108824933] [2021-05-03 14:14:26,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183702] [2021-05-03 14:14:26,998 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 [2021-05-03 14:14:27,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:14:27,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:14:27,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:14:27,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:27,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:27,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-05-03 14:14:27,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807655421] [2021-05-03 14:14:27,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:14:27,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:27,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:14:27,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:14:27,065 INFO L87 Difference]: Start difference. First operand 131226 states and 396018 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) [2021-05-03 14:14:27,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:27,706 INFO L93 Difference]: Finished difference Result 132184 states and 397974 transitions. [2021-05-03 14:14:27,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:14:27,707 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 24 [2021-05-03 14:14:27,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:28,021 INFO L225 Difference]: With dead ends: 132184 [2021-05-03 14:14:28,022 INFO L226 Difference]: Without dead ends: 132172 [2021-05-03 14:14:28,022 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 181.9ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:14:28,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132172 states. [2021-05-03 14:14:30,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132172 to 131230. [2021-05-03 14:14:30,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131230 states, 131229 states have (on average 3.0178390447233463) internal successors, (396028), 131229 states have internal predecessors, (396028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:31,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131230 states to 131230 states and 396028 transitions. [2021-05-03 14:14:31,130 INFO L78 Accepts]: Start accepts. Automaton has 131230 states and 396028 transitions. Word has length 24 [2021-05-03 14:14:31,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:31,130 INFO L480 AbstractCegarLoop]: Abstraction has 131230 states and 396028 transitions. [2021-05-03 14:14:31,130 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) [2021-05-03 14:14:31,130 INFO L276 IsEmpty]: Start isEmpty. Operand 131230 states and 396028 transitions. [2021-05-03 14:14:31,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:14:31,176 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:31,176 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:31,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10633 [2021-05-03 14:14:31,377 INFO L428 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:31,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:31,377 INFO L82 PathProgramCache]: Analyzing trace with hash 2108883820, now seen corresponding path program 337 times [2021-05-03 14:14:31,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:31,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245201495] [2021-05-03 14:14:31,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:31,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:31,485 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:31,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245201495] [2021-05-03 14:14:31,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692435557] [2021-05-03 14:14:31,485 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 [2021-05-03 14:14:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:31,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:14:31,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:31,549 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:14:31,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:31,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-05-03 14:14:31,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45666173] [2021-05-03 14:14:31,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:14:31,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:31,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:14:31,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:14:31,550 INFO L87 Difference]: Start difference. First operand 131230 states and 396028 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) [2021-05-03 14:14:32,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:32,168 INFO L93 Difference]: Finished difference Result 132077 states and 397760 transitions. [2021-05-03 14:14:32,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:14:32,169 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 24 [2021-05-03 14:14:32,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:32,456 INFO L225 Difference]: With dead ends: 132077 [2021-05-03 14:14:32,456 INFO L226 Difference]: Without dead ends: 132063 [2021-05-03 14:14:32,456 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 194.5ms TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:14:32,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132063 states. [2021-05-03 14:14:34,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132063 to 131230. [2021-05-03 14:14:35,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131230 states, 131229 states have (on average 3.017823804189623) internal successors, (396026), 131229 states have internal predecessors, (396026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:35,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131230 states to 131230 states and 396026 transitions. [2021-05-03 14:14:35,389 INFO L78 Accepts]: Start accepts. Automaton has 131230 states and 396026 transitions. Word has length 24 [2021-05-03 14:14:35,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:35,389 INFO L480 AbstractCegarLoop]: Abstraction has 131230 states and 396026 transitions. [2021-05-03 14:14:35,389 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) [2021-05-03 14:14:35,389 INFO L276 IsEmpty]: Start isEmpty. Operand 131230 states and 396026 transitions. [2021-05-03 14:14:35,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:14:35,799 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:35,799 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:36,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10634 [2021-05-03 14:14:36,014 INFO L428 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:36,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:36,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1156481466, now seen corresponding path program 338 times [2021-05-03 14:14:36,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:36,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103092241] [2021-05-03 14:14:36,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:36,080 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:14:36,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103092241] [2021-05-03 14:14:36,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380296668] [2021-05-03 14:14:36,080 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 [2021-05-03 14:14:36,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:14:36,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:14:36,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:14:36,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:14:36,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:36,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:14:36,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760377966] [2021-05-03 14:14:36,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:14:36,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:36,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:14:36,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:14:36,151 INFO L87 Difference]: Start difference. First operand 131230 states and 396026 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) [2021-05-03 14:14:36,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:36,680 INFO L93 Difference]: Finished difference Result 131537 states and 396519 transitions. [2021-05-03 14:14:36,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:14:36,681 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 24 [2021-05-03 14:14:36,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:37,021 INFO L225 Difference]: With dead ends: 131537 [2021-05-03 14:14:37,021 INFO L226 Difference]: Without dead ends: 131537 [2021-05-03 14:14:37,021 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=148, Invalid=232, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:14:37,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131537 states. [2021-05-03 14:14:39,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131537 to 131150. [2021-05-03 14:14:40,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131150 states, 131149 states have (on average 3.018078673874753) internal successors, (395818), 131149 states have internal predecessors, (395818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:40,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131150 states to 131150 states and 395818 transitions. [2021-05-03 14:14:40,472 INFO L78 Accepts]: Start accepts. Automaton has 131150 states and 395818 transitions. Word has length 24 [2021-05-03 14:14:40,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:40,472 INFO L480 AbstractCegarLoop]: Abstraction has 131150 states and 395818 transitions. [2021-05-03 14:14:40,472 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) [2021-05-03 14:14:40,472 INFO L276 IsEmpty]: Start isEmpty. Operand 131150 states and 395818 transitions. [2021-05-03 14:14:40,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:14:40,534 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:40,534 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:40,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10635 [2021-05-03 14:14:40,749 INFO L428 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:40,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:40,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1380742056, now seen corresponding path program 339 times [2021-05-03 14:14:40,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:40,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879219977] [2021-05-03 14:14:40,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:40,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:40,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879219977] [2021-05-03 14:14:40,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327416588] [2021-05-03 14:14:40,883 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 [2021-05-03 14:14:40,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:14:40,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:14:40,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:14:40,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:40,968 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:40,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:40,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-05-03 14:14:40,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617580146] [2021-05-03 14:14:40,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:14:40,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:40,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:14:40,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:14:40,968 INFO L87 Difference]: Start difference. First operand 131150 states and 395818 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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) [2021-05-03 14:14:42,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:42,230 INFO L93 Difference]: Finished difference Result 131545 states and 396600 transitions. [2021-05-03 14:14:42,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:14:42,231 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 24 [2021-05-03 14:14:42,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:42,584 INFO L225 Difference]: With dead ends: 131545 [2021-05-03 14:14:42,585 INFO L226 Difference]: Without dead ends: 131527 [2021-05-03 14:14:42,585 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 237.2ms TimeCoverageRelationStatistics Valid=305, Invalid=687, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:14:42,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131527 states. [2021-05-03 14:14:45,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131527 to 131140. [2021-05-03 14:14:45,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131140 states, 131139 states have (on average 3.0178284110752713) internal successors, (395755), 131139 states have internal predecessors, (395755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:46,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131140 states to 131140 states and 395755 transitions. [2021-05-03 14:14:46,023 INFO L78 Accepts]: Start accepts. Automaton has 131140 states and 395755 transitions. Word has length 24 [2021-05-03 14:14:46,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:46,023 INFO L480 AbstractCegarLoop]: Abstraction has 131140 states and 395755 transitions. [2021-05-03 14:14:46,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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) [2021-05-03 14:14:46,023 INFO L276 IsEmpty]: Start isEmpty. Operand 131140 states and 395755 transitions. [2021-05-03 14:14:46,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:14:46,081 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:46,081 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:46,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10636,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:46,296 INFO L428 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:46,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:46,296 INFO L82 PathProgramCache]: Analyzing trace with hash -378548606, now seen corresponding path program 340 times [2021-05-03 14:14:46,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:46,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095213128] [2021-05-03 14:14:46,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:46,420 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:46,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095213128] [2021-05-03 14:14:46,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221459395] [2021-05-03 14:14:46,420 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 [2021-05-03 14:14:46,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:14:46,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:14:46,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:14:46,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:46,497 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:14:46,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:46,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2021-05-03 14:14:46,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189158574] [2021-05-03 14:14:46,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:14:46,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:46,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:14:46,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:14:46,498 INFO L87 Difference]: Start difference. First operand 131140 states and 395755 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-05-03 14:14:47,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:47,953 INFO L93 Difference]: Finished difference Result 132843 states and 399256 transitions. [2021-05-03 14:14:47,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:14:47,954 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 24 [2021-05-03 14:14:47,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:48,378 INFO L225 Difference]: With dead ends: 132843 [2021-05-03 14:14:48,378 INFO L226 Difference]: Without dead ends: 132825 [2021-05-03 14:14:48,379 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 234.9ms TimeCoverageRelationStatistics Valid=305, Invalid=687, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:14:48,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132825 states. [2021-05-03 14:14:51,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132825 to 131194. [2021-05-03 14:14:51,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131194 states, 131193 states have (on average 3.017317997149238) internal successors, (395851), 131193 states have internal predecessors, (395851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:51,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131194 states to 131194 states and 395851 transitions. [2021-05-03 14:14:51,487 INFO L78 Accepts]: Start accepts. Automaton has 131194 states and 395851 transitions. Word has length 24 [2021-05-03 14:14:51,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:51,487 INFO L480 AbstractCegarLoop]: Abstraction has 131194 states and 395851 transitions. [2021-05-03 14:14:51,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-05-03 14:14:51,487 INFO L276 IsEmpty]: Start isEmpty. Operand 131194 states and 395851 transitions. [2021-05-03 14:14:51,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:14:51,539 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:51,539 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:51,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10637,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:51,745 INFO L428 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:51,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:51,745 INFO L82 PathProgramCache]: Analyzing trace with hash -647295034, now seen corresponding path program 341 times [2021-05-03 14:14:51,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:51,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255651506] [2021-05-03 14:14:51,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:51,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255651506] [2021-05-03 14:14:51,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685025964] [2021-05-03 14:14:51,864 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 [2021-05-03 14:14:51,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:14:51,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:14:51,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:14:51,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:51,948 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:14:51,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:51,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2021-05-03 14:14:51,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634138742] [2021-05-03 14:14:51,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:14:51,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:51,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:14:51,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:14:51,949 INFO L87 Difference]: Start difference. First operand 131194 states and 395851 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-05-03 14:14:53,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:53,119 INFO L93 Difference]: Finished difference Result 132117 states and 397738 transitions. [2021-05-03 14:14:53,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:14:53,119 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 24 [2021-05-03 14:14:53,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:53,395 INFO L225 Difference]: With dead ends: 132117 [2021-05-03 14:14:53,396 INFO L226 Difference]: Without dead ends: 132103 [2021-05-03 14:14:53,396 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 241.4ms TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:14:53,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132103 states. [2021-05-03 14:14:55,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132103 to 131192. [2021-05-03 14:14:55,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131192 states, 131191 states have (on average 3.0173182611612077) internal successors, (395845), 131191 states have internal predecessors, (395845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:55,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131192 states to 131192 states and 395845 transitions. [2021-05-03 14:14:55,993 INFO L78 Accepts]: Start accepts. Automaton has 131192 states and 395845 transitions. Word has length 24 [2021-05-03 14:14:55,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:55,993 INFO L480 AbstractCegarLoop]: Abstraction has 131192 states and 395845 transitions. [2021-05-03 14:14:55,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-05-03 14:14:55,994 INFO L276 IsEmpty]: Start isEmpty. Operand 131192 states and 395845 transitions. [2021-05-03 14:14:56,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:14:56,039 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:56,040 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:56,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10638,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:56,253 INFO L428 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:56,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:56,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1958685642, now seen corresponding path program 342 times [2021-05-03 14:14:56,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:56,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344237372] [2021-05-03 14:14:56,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:56,313 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:14:56,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344237372] [2021-05-03 14:14:56,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711754408] [2021-05-03 14:14:56,313 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 [2021-05-03 14:14:56,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:14:56,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:14:56,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:14:56,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:56,384 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:14:56,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:56,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-03 14:14:56,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126538090] [2021-05-03 14:14:56,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:14:56,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:56,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:14:56,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:14:56,385 INFO L87 Difference]: Start difference. First operand 131192 states and 395845 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) [2021-05-03 14:14:56,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:56,912 INFO L93 Difference]: Finished difference Result 131572 states and 396467 transitions. [2021-05-03 14:14:56,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:14:56,913 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 24 [2021-05-03 14:14:56,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:57,742 INFO L225 Difference]: With dead ends: 131572 [2021-05-03 14:14:57,742 INFO L226 Difference]: Without dead ends: 131572 [2021-05-03 14:14:57,742 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:14:57,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131572 states. [2021-05-03 14:14:59,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131572 to 131222. [2021-05-03 14:14:59,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131222 states, 131221 states have (on average 3.017291439632376) internal successors, (395932), 131221 states have internal predecessors, (395932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:00,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131222 states to 131222 states and 395932 transitions. [2021-05-03 14:15:00,312 INFO L78 Accepts]: Start accepts. Automaton has 131222 states and 395932 transitions. Word has length 24 [2021-05-03 14:15:00,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:15:00,313 INFO L480 AbstractCegarLoop]: Abstraction has 131222 states and 395932 transitions. [2021-05-03 14:15:00,313 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) [2021-05-03 14:15:00,313 INFO L276 IsEmpty]: Start isEmpty. Operand 131222 states and 395932 transitions. [2021-05-03 14:15:00,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:15:00,368 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:15:00,368 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:15:00,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10639,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:00,568 INFO L428 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:15:00,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:15:00,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1685775956, now seen corresponding path program 343 times [2021-05-03 14:15:00,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:15:00,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961159443] [2021-05-03 14:15:00,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:15:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:15:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 38 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:00,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961159443] [2021-05-03 14:15:00,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895742722] [2021-05-03 14:15:00,651 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 [2021-05-03 14:15:00,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:15:00,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:15:00,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:15:00,717 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:15:00,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:15:00,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2021-05-03 14:15:00,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521612267] [2021-05-03 14:15:00,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:15:00,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:15:00,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:15:00,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:15:00,717 INFO L87 Difference]: Start difference. First operand 131222 states and 395932 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) [2021-05-03 14:15:01,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:15:01,361 INFO L93 Difference]: Finished difference Result 131499 states and 396327 transitions. [2021-05-03 14:15:01,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:15:01,362 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 24 [2021-05-03 14:15:01,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:15:01,665 INFO L225 Difference]: With dead ends: 131499 [2021-05-03 14:15:01,665 INFO L226 Difference]: Without dead ends: 131496 [2021-05-03 14:15:01,665 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 151.4ms TimeCoverageRelationStatistics Valid=215, Invalid=435, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:15:01,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131496 states. [2021-05-03 14:15:04,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131496 to 131222. [2021-05-03 14:15:04,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131222 states, 131221 states have (on average 3.0170704384206797) internal successors, (395903), 131221 states have internal predecessors, (395903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:05,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131222 states to 131222 states and 395903 transitions. [2021-05-03 14:15:05,151 INFO L78 Accepts]: Start accepts. Automaton has 131222 states and 395903 transitions. Word has length 24 [2021-05-03 14:15:05,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:15:05,151 INFO L480 AbstractCegarLoop]: Abstraction has 131222 states and 395903 transitions. [2021-05-03 14:15:05,151 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) [2021-05-03 14:15:05,151 INFO L276 IsEmpty]: Start isEmpty. Operand 131222 states and 395903 transitions. [2021-05-03 14:15:05,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:15:05,208 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:15:05,208 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:15:05,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10640 [2021-05-03 14:15:05,408 INFO L428 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:15:05,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:15:05,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1536105960, now seen corresponding path program 344 times [2021-05-03 14:15:05,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:15:05,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000837004] [2021-05-03 14:15:05,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:15:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:15:05,505 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:15:05,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000837004] [2021-05-03 14:15:05,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968204262] [2021-05-03 14:15:05,505 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) [2021-05-03 14:15:05,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:15:05,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:15:05,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:15:05,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:05,602 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:15:05,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:15:05,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-05-03 14:15:05,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73156609] [2021-05-03 14:15:05,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:15:05,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:15:05,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:15:05,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:15:05,602 INFO L87 Difference]: Start difference. First operand 131222 states and 395903 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) [2021-05-03 14:15:06,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:15:06,270 INFO L93 Difference]: Finished difference Result 131505 states and 396305 transitions. [2021-05-03 14:15:06,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:15:06,271 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 24 [2021-05-03 14:15:06,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:15:06,545 INFO L225 Difference]: With dead ends: 131505 [2021-05-03 14:15:06,546 INFO L226 Difference]: Without dead ends: 131500 [2021-05-03 14:15:06,546 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 183.8ms TimeCoverageRelationStatistics Valid=244, Invalid=512, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:15:06,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131500 states. [2021-05-03 14:15:09,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131500 to 131222. [2021-05-03 14:15:09,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131222 states, 131221 states have (on average 3.016437917711342) internal successors, (395820), 131221 states have internal predecessors, (395820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:10,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131222 states to 131222 states and 395820 transitions. [2021-05-03 14:15:10,008 INFO L78 Accepts]: Start accepts. Automaton has 131222 states and 395820 transitions. Word has length 24 [2021-05-03 14:15:10,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:15:10,008 INFO L480 AbstractCegarLoop]: Abstraction has 131222 states and 395820 transitions. [2021-05-03 14:15:10,008 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) [2021-05-03 14:15:10,009 INFO L276 IsEmpty]: Start isEmpty. Operand 131222 states and 395820 transitions. [2021-05-03 14:15:10,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:15:10,058 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:15:10,058 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:15:10,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10641 [2021-05-03 14:15:10,273 INFO L428 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:15:10,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:15:10,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1664769748, now seen corresponding path program 345 times [2021-05-03 14:15:10,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:15:10,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311403898] [2021-05-03 14:15:10,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:15:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:15:10,373 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:10,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311403898] [2021-05-03 14:15:10,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130164406] [2021-05-03 14:15:10,373 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 [2021-05-03 14:15:10,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:15:10,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:15:10,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:15:10,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:15:10,466 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:10,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:15:10,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-05-03 14:15:10,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902516832] [2021-05-03 14:15:10,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:15:10,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:15:10,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:15:10,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:15:10,466 INFO L87 Difference]: Start difference. First operand 131222 states and 395820 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) [2021-05-03 14:15:11,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:15:11,136 INFO L93 Difference]: Finished difference Result 131512 states and 396230 transitions. [2021-05-03 14:15:11,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:15:11,137 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 24 [2021-05-03 14:15:11,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:15:11,431 INFO L225 Difference]: With dead ends: 131512 [2021-05-03 14:15:11,432 INFO L226 Difference]: Without dead ends: 131506 [2021-05-03 14:15:11,432 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 192.3ms TimeCoverageRelationStatistics Valid=276, Invalid=594, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:15:11,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131506 states. [2021-05-03 14:15:14,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131506 to 131222. [2021-05-03 14:15:14,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131222 states, 131221 states have (on average 3.014890909229468) internal successors, (395617), 131221 states have internal predecessors, (395617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:14,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131222 states to 131222 states and 395617 transitions. [2021-05-03 14:15:14,667 INFO L78 Accepts]: Start accepts. Automaton has 131222 states and 395617 transitions. Word has length 24 [2021-05-03 14:15:14,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:15:14,667 INFO L480 AbstractCegarLoop]: Abstraction has 131222 states and 395617 transitions. [2021-05-03 14:15:14,667 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) [2021-05-03 14:15:14,667 INFO L276 IsEmpty]: Start isEmpty. Operand 131222 states and 395617 transitions. [2021-05-03 14:15:14,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:15:14,727 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:15:14,727 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:15:14,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10642 [2021-05-03 14:15:14,941 INFO L428 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:15:14,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:15:14,941 INFO L82 PathProgramCache]: Analyzing trace with hash -2107668888, now seen corresponding path program 346 times [2021-05-03 14:15:14,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:15:14,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556708008] [2021-05-03 14:15:14,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:15:14,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:15:15,050 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:15,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556708008] [2021-05-03 14:15:15,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754170353] [2021-05-03 14:15:15,051 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 [2021-05-03 14:15:15,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:15:15,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:15:15,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:15:15,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:15:15,637 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:15:15,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:15:15,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-05-03 14:15:15,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199346386] [2021-05-03 14:15:15,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:15:15,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:15:15,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:15:15,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:15:15,637 INFO L87 Difference]: Start difference. First operand 131222 states and 395617 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) [2021-05-03 14:15:16,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:15:16,441 INFO L93 Difference]: Finished difference Result 134981 states and 404371 transitions. [2021-05-03 14:15:16,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:15:16,442 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 24 [2021-05-03 14:15:16,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:15:16,782 INFO L225 Difference]: With dead ends: 134981 [2021-05-03 14:15:16,782 INFO L226 Difference]: Without dead ends: 134973 [2021-05-03 14:15:16,783 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 684.8ms TimeCoverageRelationStatistics Valid=271, Invalid=599, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:15:16,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134973 states. [2021-05-03 14:15:19,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134973 to 131282. [2021-05-03 14:15:19,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131282 states, 131281 states have (on average 3.014632734363693) internal successors, (395764), 131281 states have internal predecessors, (395764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:20,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131282 states to 131282 states and 395764 transitions. [2021-05-03 14:15:20,329 INFO L78 Accepts]: Start accepts. Automaton has 131282 states and 395764 transitions. Word has length 24 [2021-05-03 14:15:20,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:15:20,329 INFO L480 AbstractCegarLoop]: Abstraction has 131282 states and 395764 transitions. [2021-05-03 14:15:20,329 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) [2021-05-03 14:15:20,329 INFO L276 IsEmpty]: Start isEmpty. Operand 131282 states and 395764 transitions. [2021-05-03 14:15:20,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:15:20,387 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:15:20,387 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:15:20,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10643,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:20,604 INFO L428 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:15:20,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:15:20,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1342326956, now seen corresponding path program 347 times [2021-05-03 14:15:20,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:15:20,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259056443] [2021-05-03 14:15:20,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:15:20,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:15:20,722 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:15:20,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259056443] [2021-05-03 14:15:20,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615253580] [2021-05-03 14:15:20,723 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 [2021-05-03 14:15:20,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:15:20,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:15:20,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:15:20,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:15:20,806 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:15:20,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:15:20,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-05-03 14:15:20,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428330431] [2021-05-03 14:15:20,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:15:20,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:15:20,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:15:20,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:15:20,807 INFO L87 Difference]: Start difference. First operand 131282 states and 395764 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) [2021-05-03 14:15:22,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:15:22,035 INFO L93 Difference]: Finished difference Result 133765 states and 401069 transitions. [2021-05-03 14:15:22,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:15:22,036 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 24 [2021-05-03 14:15:22,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:15:22,396 INFO L225 Difference]: With dead ends: 133765 [2021-05-03 14:15:22,396 INFO L226 Difference]: Without dead ends: 133750 [2021-05-03 14:15:22,396 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 220.1ms TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:15:22,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133750 states. [2021-05-03 14:15:25,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133750 to 131295. [2021-05-03 14:15:25,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131295 states, 131294 states have (on average 3.0145475040748244) internal successors, (395792), 131294 states have internal predecessors, (395792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:25,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131295 states to 131295 states and 395792 transitions. [2021-05-03 14:15:25,669 INFO L78 Accepts]: Start accepts. Automaton has 131295 states and 395792 transitions. Word has length 24 [2021-05-03 14:15:25,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:15:25,670 INFO L480 AbstractCegarLoop]: Abstraction has 131295 states and 395792 transitions. [2021-05-03 14:15:25,670 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) [2021-05-03 14:15:25,670 INFO L276 IsEmpty]: Start isEmpty. Operand 131295 states and 395792 transitions. [2021-05-03 14:15:25,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:15:25,731 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:15:25,731 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:15:25,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10644,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:25,946 INFO L428 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:15:25,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:15:25,947 INFO L82 PathProgramCache]: Analyzing trace with hash 918015720, now seen corresponding path program 348 times [2021-05-03 14:15:25,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:15:25,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129113662] [2021-05-03 14:15:25,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:15:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:15:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:26,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129113662] [2021-05-03 14:15:26,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155172082] [2021-05-03 14:15:26,073 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 [2021-05-03 14:15:26,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:15:26,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:15:26,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:15:26,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:15:26,161 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:26,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:15:26,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-05-03 14:15:26,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37282460] [2021-05-03 14:15:26,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:15:26,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:15:26,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:15:26,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:15:26,162 INFO L87 Difference]: Start difference. First operand 131295 states and 395792 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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) [2021-05-03 14:15:27,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:15:27,685 INFO L93 Difference]: Finished difference Result 133777 states and 401075 transitions. [2021-05-03 14:15:27,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:15:27,685 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 24 [2021-05-03 14:15:27,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:15:28,139 INFO L225 Difference]: With dead ends: 133777 [2021-05-03 14:15:28,139 INFO L226 Difference]: Without dead ends: 133759 [2021-05-03 14:15:28,139 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 267.4ms TimeCoverageRelationStatistics Valid=305, Invalid=687, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:15:28,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133759 states. [2021-05-03 14:15:30,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133759 to 131393. [2021-05-03 14:15:30,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131393 states, 131392 states have (on average 3.0140800048709204) internal successors, (396026), 131392 states have internal predecessors, (396026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:31,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131393 states to 131393 states and 396026 transitions. [2021-05-03 14:15:31,364 INFO L78 Accepts]: Start accepts. Automaton has 131393 states and 396026 transitions. Word has length 24 [2021-05-03 14:15:31,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:15:31,364 INFO L480 AbstractCegarLoop]: Abstraction has 131393 states and 396026 transitions. [2021-05-03 14:15:31,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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) [2021-05-03 14:15:31,364 INFO L276 IsEmpty]: Start isEmpty. Operand 131393 states and 396026 transitions. [2021-05-03 14:15:31,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:15:31,420 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:15:31,420 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:15:31,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10645 [2021-05-03 14:15:31,621 INFO L428 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:15:31,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:15:31,621 INFO L82 PathProgramCache]: Analyzing trace with hash 649269292, now seen corresponding path program 349 times [2021-05-03 14:15:31,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:15:31,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125506652] [2021-05-03 14:15:31,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:15:31,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:15:31,749 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:31,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125506652] [2021-05-03 14:15:31,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845024562] [2021-05-03 14:15:31,750 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) [2021-05-03 14:15:31,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:15:31,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:15:31,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:31,842 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:15:31,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:15:31,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2021-05-03 14:15:31,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741628230] [2021-05-03 14:15:31,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:15:31,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:15:31,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:15:31,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:15:31,843 INFO L87 Difference]: Start difference. First operand 131393 states and 396026 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-05-03 14:15:33,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:15:33,139 INFO L93 Difference]: Finished difference Result 132504 states and 398292 transitions. [2021-05-03 14:15:33,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:15:33,140 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 24 [2021-05-03 14:15:33,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:15:33,438 INFO L225 Difference]: With dead ends: 132504 [2021-05-03 14:15:33,439 INFO L226 Difference]: Without dead ends: 132483 [2021-05-03 14:15:33,439 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 262.5ms TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:15:33,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132483 states. [2021-05-03 14:15:35,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132483 to 131393. [2021-05-03 14:15:35,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131393 states, 131392 states have (on average 3.0140571724305896) internal successors, (396023), 131392 states have internal predecessors, (396023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:36,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131393 states to 131393 states and 396023 transitions. [2021-05-03 14:15:36,234 INFO L78 Accepts]: Start accepts. Automaton has 131393 states and 396023 transitions. Word has length 24 [2021-05-03 14:15:36,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:15:36,235 INFO L480 AbstractCegarLoop]: Abstraction has 131393 states and 396023 transitions. [2021-05-03 14:15:36,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-05-03 14:15:36,235 INFO L276 IsEmpty]: Start isEmpty. Operand 131393 states and 396023 transitions. [2021-05-03 14:15:36,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:15:36,288 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:15:36,288 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:15:36,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10646,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:36,488 INFO L428 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:15:36,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:15:36,488 INFO L82 PathProgramCache]: Analyzing trace with hash 908064616, now seen corresponding path program 350 times [2021-05-03 14:15:36,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:15:36,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829813369] [2021-05-03 14:15:36,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:15:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:15:36,604 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 57 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:36,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829813369] [2021-05-03 14:15:36,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505867274] [2021-05-03 14:15:36,604 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 [2021-05-03 14:15:36,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:15:36,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:15:36,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:15:36,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:15:36,678 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 59 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:15:36,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:15:36,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2021-05-03 14:15:36,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774077210] [2021-05-03 14:15:36,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:15:36,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:15:36,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:15:36,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:15:36,679 INFO L87 Difference]: Start difference. First operand 131393 states and 396023 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-05-03 14:15:37,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:15:37,862 INFO L93 Difference]: Finished difference Result 132387 states and 398057 transitions. [2021-05-03 14:15:37,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:15:37,863 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 24 [2021-05-03 14:15:37,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:15:38,163 INFO L225 Difference]: With dead ends: 132387 [2021-05-03 14:15:38,163 INFO L226 Difference]: Without dead ends: 132363 [2021-05-03 14:15:38,163 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 253.8ms TimeCoverageRelationStatistics Valid=324, Invalid=732, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:15:38,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132363 states. [2021-05-03 14:15:40,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132363 to 131393. [2021-05-03 14:15:40,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131393 states, 131392 states have (on average 3.0140343399902583) internal successors, (396020), 131392 states have internal predecessors, (396020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:40,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131393 states to 131393 states and 396020 transitions. [2021-05-03 14:15:40,866 INFO L78 Accepts]: Start accepts. Automaton has 131393 states and 396020 transitions. Word has length 24 [2021-05-03 14:15:40,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:15:40,866 INFO L480 AbstractCegarLoop]: Abstraction has 131393 states and 396020 transitions. [2021-05-03 14:15:40,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-05-03 14:15:40,866 INFO L276 IsEmpty]: Start isEmpty. Operand 131393 states and 396020 transitions. [2021-05-03 14:15:40,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:15:40,915 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:15:40,915 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:15:41,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10647,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:41,115 INFO L428 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:15:41,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:15:41,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1884179694, now seen corresponding path program 351 times [2021-05-03 14:15:41,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:15:41,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201365563] [2021-05-03 14:15:41,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:15:41,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:15:41,214 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 55 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:41,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201365563] [2021-05-03 14:15:41,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976775366] [2021-05-03 14:15:41,215 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 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 [2021-05-03 14:15:41,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:15:41,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:15:41,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:15:41,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:15:41,290 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 63 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:15:41,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:15:41,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-05-03 14:15:41,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588956673] [2021-05-03 14:15:41,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:15:41,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:15:41,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:15:41,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:15:41,291 INFO L87 Difference]: Start difference. First operand 131393 states and 396020 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) [2021-05-03 14:15:41,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:15:41,914 INFO L93 Difference]: Finished difference Result 131727 states and 396599 transitions. [2021-05-03 14:15:41,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:15:41,925 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 24 [2021-05-03 14:15:41,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:15:42,211 INFO L225 Difference]: With dead ends: 131727 [2021-05-03 14:15:42,211 INFO L226 Difference]: Without dead ends: 131723 [2021-05-03 14:15:42,211 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 154.6ms TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:15:42,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131723 states. [2021-05-03 14:15:44,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131723 to 131445. [2021-05-03 14:15:45,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131445 states, 131444 states have (on average 3.013792946045464) internal successors, (396145), 131444 states have internal predecessors, (396145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:45,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131445 states to 131445 states and 396145 transitions. [2021-05-03 14:15:45,390 INFO L78 Accepts]: Start accepts. Automaton has 131445 states and 396145 transitions. Word has length 24 [2021-05-03 14:15:45,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:15:45,390 INFO L480 AbstractCegarLoop]: Abstraction has 131445 states and 396145 transitions. [2021-05-03 14:15:45,390 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) [2021-05-03 14:15:45,390 INFO L276 IsEmpty]: Start isEmpty. Operand 131445 states and 396145 transitions. [2021-05-03 14:15:45,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:15:45,440 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:15:45,440 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:15:45,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10648 [2021-05-03 14:15:45,641 INFO L428 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:15:45,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:15:45,641 INFO L82 PathProgramCache]: Analyzing trace with hash 705147248, now seen corresponding path program 352 times [2021-05-03 14:15:45,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:15:45,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952909709] [2021-05-03 14:15:45,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:15:45,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:15:45,760 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:15:45,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952909709] [2021-05-03 14:15:45,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836442509] [2021-05-03 14:15:45,760 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 [2021-05-03 14:15:45,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:15:45,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:15:45,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:15:45,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:15:45,823 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:15:45,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:15:45,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-05-03 14:15:45,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143089294] [2021-05-03 14:15:45,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:15:45,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:15:45,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:15:45,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:15:45,824 INFO L87 Difference]: Start difference. First operand 131445 states and 396145 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) [2021-05-03 14:15:46,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:15:46,490 INFO L93 Difference]: Finished difference Result 131922 states and 397089 transitions. [2021-05-03 14:15:46,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:15:46,490 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 24 [2021-05-03 14:15:46,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:15:46,785 INFO L225 Difference]: With dead ends: 131922 [2021-05-03 14:15:46,785 INFO L226 Difference]: Without dead ends: 131918 [2021-05-03 14:15:46,785 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 174.6ms TimeCoverageRelationStatistics Valid=235, Invalid=521, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:15:46,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131918 states. [2021-05-03 14:15:49,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131918 to 131425. [2021-05-03 14:15:49,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131425 states, 131424 states have (on average 3.013209155101047) internal successors, (396008), 131424 states have internal predecessors, (396008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:49,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131425 states to 131425 states and 396008 transitions. [2021-05-03 14:15:49,986 INFO L78 Accepts]: Start accepts. Automaton has 131425 states and 396008 transitions. Word has length 24 [2021-05-03 14:15:49,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:15:49,986 INFO L480 AbstractCegarLoop]: Abstraction has 131425 states and 396008 transitions. [2021-05-03 14:15:49,986 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) [2021-05-03 14:15:49,987 INFO L276 IsEmpty]: Start isEmpty. Operand 131425 states and 396008 transitions. [2021-05-03 14:15:50,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:15:50,029 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:15:50,029 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:15:50,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10649,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:50,229 INFO L428 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:15:50,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:15:50,229 INFO L82 PathProgramCache]: Analyzing trace with hash -139824204, now seen corresponding path program 353 times [2021-05-03 14:15:50,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:15:50,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747499324] [2021-05-03 14:15:50,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:15:50,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:15:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:50,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747499324] [2021-05-03 14:15:50,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187147549] [2021-05-03 14:15:50,346 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 [2021-05-03 14:15:50,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:15:50,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:15:50,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:15:50,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:15:50,414 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:15:50,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:15:50,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-05-03 14:15:50,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478226852] [2021-05-03 14:15:50,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:15:50,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:15:50,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:15:50,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:15:50,414 INFO L87 Difference]: Start difference. First operand 131425 states and 396008 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) [2021-05-03 14:15:51,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:15:51,067 INFO L93 Difference]: Finished difference Result 131927 states and 396979 transitions. [2021-05-03 14:15:51,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:15:51,068 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 24 [2021-05-03 14:15:51,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:15:51,368 INFO L225 Difference]: With dead ends: 131927 [2021-05-03 14:15:51,368 INFO L226 Difference]: Without dead ends: 131912 [2021-05-03 14:15:51,369 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 217.0ms TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:15:51,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131912 states. [2021-05-03 14:15:54,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131912 to 131483. [2021-05-03 14:15:54,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131483 states, 131482 states have (on average 3.012108121263747) internal successors, (396038), 131482 states have internal predecessors, (396038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:55,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131483 states to 131483 states and 396038 transitions. [2021-05-03 14:15:55,265 INFO L78 Accepts]: Start accepts. Automaton has 131483 states and 396038 transitions. Word has length 24 [2021-05-03 14:15:55,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:15:55,266 INFO L480 AbstractCegarLoop]: Abstraction has 131483 states and 396038 transitions. [2021-05-03 14:15:55,266 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) [2021-05-03 14:15:55,266 INFO L276 IsEmpty]: Start isEmpty. Operand 131483 states and 396038 transitions. [2021-05-03 14:15:55,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:15:55,335 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:15:55,335 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:15:55,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10650 [2021-05-03 14:15:55,553 INFO L428 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:15:55,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:15:55,553 INFO L82 PathProgramCache]: Analyzing trace with hash -564135440, now seen corresponding path program 354 times [2021-05-03 14:15:55,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:15:55,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949206165] [2021-05-03 14:15:55,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:15:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:15:55,666 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:55,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949206165] [2021-05-03 14:15:55,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109357377] [2021-05-03 14:15:55,667 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 [2021-05-03 14:15:55,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:15:55,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:15:55,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:15:55,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:15:55,735 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:55,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:15:55,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-05-03 14:15:55,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913384200] [2021-05-03 14:15:55,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:15:55,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:15:55,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:15:55,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:15:55,736 INFO L87 Difference]: Start difference. First operand 131483 states and 396038 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) [2021-05-03 14:15:56,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:15:56,448 INFO L93 Difference]: Finished difference Result 132364 states and 397834 transitions. [2021-05-03 14:15:56,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:15:56,449 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 24 [2021-05-03 14:15:56,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:15:56,774 INFO L225 Difference]: With dead ends: 132364 [2021-05-03 14:15:56,774 INFO L226 Difference]: Without dead ends: 132358 [2021-05-03 14:15:56,774 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 229.6ms TimeCoverageRelationStatistics Valid=303, Invalid=689, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:15:56,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132358 states. [2021-05-03 14:15:59,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132358 to 131489. [2021-05-03 14:15:59,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131489 states, 131488 states have (on average 3.0120695424677537) internal successors, (396051), 131488 states have internal predecessors, (396051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:00,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131489 states to 131489 states and 396051 transitions. [2021-05-03 14:16:00,095 INFO L78 Accepts]: Start accepts. Automaton has 131489 states and 396051 transitions. Word has length 24 [2021-05-03 14:16:00,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:16:00,095 INFO L480 AbstractCegarLoop]: Abstraction has 131489 states and 396051 transitions. [2021-05-03 14:16:00,095 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) [2021-05-03 14:16:00,096 INFO L276 IsEmpty]: Start isEmpty. Operand 131489 states and 396051 transitions. [2021-05-03 14:16:00,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:16:00,158 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:16:00,158 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:16:00,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10651 [2021-05-03 14:16:00,373 INFO L428 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:16:00,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:16:00,373 INFO L82 PathProgramCache]: Analyzing trace with hash -832881868, now seen corresponding path program 355 times [2021-05-03 14:16:00,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:16:00,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310166957] [2021-05-03 14:16:00,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:16:00,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:16:00,486 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:00,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310166957] [2021-05-03 14:16:00,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868478642] [2021-05-03 14:16:00,486 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 [2021-05-03 14:16:00,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:16:00,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:16:00,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:16:00,556 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:16:00,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:16:00,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-05-03 14:16:00,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105560362] [2021-05-03 14:16:00,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:16:00,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:16:00,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:16:00,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:16:00,557 INFO L87 Difference]: Start difference. First operand 131489 states and 396051 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) [2021-05-03 14:16:01,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:16:01,673 INFO L93 Difference]: Finished difference Result 132345 states and 397806 transitions. [2021-05-03 14:16:01,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:16:01,684 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 24 [2021-05-03 14:16:01,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:16:02,016 INFO L225 Difference]: With dead ends: 132345 [2021-05-03 14:16:02,016 INFO L226 Difference]: Without dead ends: 132338 [2021-05-03 14:16:02,016 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 235.9ms TimeCoverageRelationStatistics Valid=306, Invalid=686, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:16:02,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132338 states. [2021-05-03 14:16:04,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132338 to 131489. [2021-05-03 14:16:04,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131489 states, 131488 states have (on average 3.0120315161839866) internal successors, (396046), 131488 states have internal predecessors, (396046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:05,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131489 states to 131489 states and 396046 transitions. [2021-05-03 14:16:05,391 INFO L78 Accepts]: Start accepts. Automaton has 131489 states and 396046 transitions. Word has length 24 [2021-05-03 14:16:05,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:16:05,391 INFO L480 AbstractCegarLoop]: Abstraction has 131489 states and 396046 transitions. [2021-05-03 14:16:05,391 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) [2021-05-03 14:16:05,391 INFO L276 IsEmpty]: Start isEmpty. Operand 131489 states and 396046 transitions. [2021-05-03 14:16:05,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:16:05,447 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:16:05,447 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:16:05,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10652 [2021-05-03 14:16:05,669 INFO L428 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:16:05,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:16:05,669 INFO L82 PathProgramCache]: Analyzing trace with hash 974653002, now seen corresponding path program 356 times [2021-05-03 14:16:05,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:16:05,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144134940] [2021-05-03 14:16:05,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:16:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:16:05,787 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:05,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144134940] [2021-05-03 14:16:05,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449458020] [2021-05-03 14:16:05,788 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 [2021-05-03 14:16:05,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:16:05,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:16:05,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:16:05,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:16:05,866 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:16:05,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:16:05,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2021-05-03 14:16:05,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241919360] [2021-05-03 14:16:05,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:16:05,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:16:05,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:16:05,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:16:05,874 INFO L87 Difference]: Start difference. First operand 131489 states and 396046 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-05-03 14:16:07,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:16:07,284 INFO L93 Difference]: Finished difference Result 131949 states and 396881 transitions. [2021-05-03 14:16:07,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:16:07,285 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 24 [2021-05-03 14:16:07,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:16:07,651 INFO L225 Difference]: With dead ends: 131949 [2021-05-03 14:16:07,652 INFO L226 Difference]: Without dead ends: 131931 [2021-05-03 14:16:07,652 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 233.6ms TimeCoverageRelationStatistics Valid=306, Invalid=686, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:16:07,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131931 states. [2021-05-03 14:16:10,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131931 to 131486. [2021-05-03 14:16:10,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131486 states, 131485 states have (on average 3.0111799825075103) internal successors, (395925), 131485 states have internal predecessors, (395925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:10,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131486 states to 131486 states and 395925 transitions. [2021-05-03 14:16:10,909 INFO L78 Accepts]: Start accepts. Automaton has 131486 states and 395925 transitions. Word has length 24 [2021-05-03 14:16:10,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:16:10,909 INFO L480 AbstractCegarLoop]: Abstraction has 131486 states and 395925 transitions. [2021-05-03 14:16:10,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-05-03 14:16:10,909 INFO L276 IsEmpty]: Start isEmpty. Operand 131486 states and 395925 transitions. [2021-05-03 14:16:10,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:16:10,969 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:16:10,969 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:16:11,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10653 [2021-05-03 14:16:11,170 INFO L428 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:16:11,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:16:11,170 INFO L82 PathProgramCache]: Analyzing trace with hash 705906574, now seen corresponding path program 357 times [2021-05-03 14:16:11,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:16:11,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319029041] [2021-05-03 14:16:11,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:16:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:16:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:11,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319029041] [2021-05-03 14:16:11,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699637872] [2021-05-03 14:16:11,292 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 [2021-05-03 14:16:11,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:16:11,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:16:11,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:16:11,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:16:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:11,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:16:11,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-05-03 14:16:11,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626214552] [2021-05-03 14:16:11,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:16:11,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:16:11,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:16:11,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:16:11,397 INFO L87 Difference]: Start difference. First operand 131486 states and 395925 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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) [2021-05-03 14:16:12,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:16:12,636 INFO L93 Difference]: Finished difference Result 132484 states and 397985 transitions. [2021-05-03 14:16:12,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:16:12,637 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 24 [2021-05-03 14:16:12,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:16:13,022 INFO L225 Difference]: With dead ends: 132484 [2021-05-03 14:16:13,022 INFO L226 Difference]: Without dead ends: 132477 [2021-05-03 14:16:13,023 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 277.0ms TimeCoverageRelationStatistics Valid=363, Invalid=827, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:16:13,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132477 states. [2021-05-03 14:16:15,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132477 to 131483. [2021-05-03 14:16:15,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131483 states, 131482 states have (on average 3.0111346039762097) internal successors, (395910), 131482 states have internal predecessors, (395910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:16,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131483 states to 131483 states and 395910 transitions. [2021-05-03 14:16:16,128 INFO L78 Accepts]: Start accepts. Automaton has 131483 states and 395910 transitions. Word has length 24 [2021-05-03 14:16:16,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:16:16,128 INFO L480 AbstractCegarLoop]: Abstraction has 131483 states and 395910 transitions. [2021-05-03 14:16:16,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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) [2021-05-03 14:16:16,128 INFO L276 IsEmpty]: Start isEmpty. Operand 131483 states and 395910 transitions. [2021-05-03 14:16:16,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:16:16,188 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:16:16,189 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:16:16,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10654 [2021-05-03 14:16:16,404 INFO L428 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:16:16,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:16:16,405 INFO L82 PathProgramCache]: Analyzing trace with hash -754467280, now seen corresponding path program 358 times [2021-05-03 14:16:16,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:16:16,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698962241] [2021-05-03 14:16:16,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:16:16,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:16:16,503 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:16,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698962241] [2021-05-03 14:16:16,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714734906] [2021-05-03 14:16:16,503 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 [2021-05-03 14:16:16,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:16:16,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:16:16,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:16:16,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:16:16,578 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:16:16,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:16:16,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-05-03 14:16:16,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901684860] [2021-05-03 14:16:16,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:16:16,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:16:16,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:16:16,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:16:16,579 INFO L87 Difference]: Start difference. First operand 131483 states and 395910 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) [2021-05-03 14:16:17,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:16:17,913 INFO L93 Difference]: Finished difference Result 132048 states and 397051 transitions. [2021-05-03 14:16:17,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:16:17,913 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 24 [2021-05-03 14:16:17,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:16:18,348 INFO L225 Difference]: With dead ends: 132048 [2021-05-03 14:16:18,348 INFO L226 Difference]: Without dead ends: 132044 [2021-05-03 14:16:18,348 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 199.4ms TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:16:18,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132044 states. [2021-05-03 14:16:20,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132044 to 131483. [2021-05-03 14:16:21,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131483 states, 131482 states have (on average 3.009248414231606) internal successors, (395662), 131482 states have internal predecessors, (395662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:21,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131483 states to 131483 states and 395662 transitions. [2021-05-03 14:16:21,504 INFO L78 Accepts]: Start accepts. Automaton has 131483 states and 395662 transitions. Word has length 24 [2021-05-03 14:16:21,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:16:21,504 INFO L480 AbstractCegarLoop]: Abstraction has 131483 states and 395662 transitions. [2021-05-03 14:16:21,504 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) [2021-05-03 14:16:21,504 INFO L276 IsEmpty]: Start isEmpty. Operand 131483 states and 395662 transitions. [2021-05-03 14:16:21,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:16:21,557 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:16:21,557 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:16:21,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10655,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:16:21,772 INFO L428 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:16:21,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:16:21,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1599438732, now seen corresponding path program 359 times [2021-05-03 14:16:21,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:16:21,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13696359] [2021-05-03 14:16:21,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:16:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:16:21,876 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:16:21,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13696359] [2021-05-03 14:16:21,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962771992] [2021-05-03 14:16:21,876 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) [2021-05-03 14:16:21,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:16:21,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:16:21,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:16:21,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:16:21,962 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:16:21,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:16:21,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-05-03 14:16:21,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696405364] [2021-05-03 14:16:21,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:16:21,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:16:21,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:16:21,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:16:21,963 INFO L87 Difference]: Start difference. First operand 131483 states and 395662 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) [2021-05-03 14:16:23,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:16:23,409 INFO L93 Difference]: Finished difference Result 134038 states and 401058 transitions. [2021-05-03 14:16:23,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:16:23,417 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 24 [2021-05-03 14:16:23,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:16:23,809 INFO L225 Difference]: With dead ends: 134038 [2021-05-03 14:16:23,809 INFO L226 Difference]: Without dead ends: 134023 [2021-05-03 14:16:23,824 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 213.3ms TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:16:23,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134023 states. [2021-05-03 14:16:26,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134023 to 131546. [2021-05-03 14:16:26,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131546 states, 131545 states have (on average 3.008985518263712) internal successors, (395817), 131545 states have internal predecessors, (395817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:27,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131546 states to 131546 states and 395817 transitions. [2021-05-03 14:16:27,061 INFO L78 Accepts]: Start accepts. Automaton has 131546 states and 395817 transitions. Word has length 24 [2021-05-03 14:16:27,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:16:27,061 INFO L480 AbstractCegarLoop]: Abstraction has 131546 states and 395817 transitions. [2021-05-03 14:16:27,061 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) [2021-05-03 14:16:27,061 INFO L276 IsEmpty]: Start isEmpty. Operand 131546 states and 395817 transitions. [2021-05-03 14:16:27,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:16:27,123 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:16:27,123 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:16:27,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10656 [2021-05-03 14:16:27,338 INFO L428 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:16:27,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:16:27,338 INFO L82 PathProgramCache]: Analyzing trace with hash -2023749968, now seen corresponding path program 360 times [2021-05-03 14:16:27,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:16:27,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830343528] [2021-05-03 14:16:27,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:16:27,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:16:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:27,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830343528] [2021-05-03 14:16:27,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249929415] [2021-05-03 14:16:27,471 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 [2021-05-03 14:16:27,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:16:27,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:16:27,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:16:27,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:16:27,561 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:27,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:16:27,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-05-03 14:16:27,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920031059] [2021-05-03 14:16:27,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:16:27,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:16:27,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:16:27,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:16:27,561 INFO L87 Difference]: Start difference. First operand 131546 states and 395817 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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) [2021-05-03 14:16:28,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:16:28,854 INFO L93 Difference]: Finished difference Result 134051 states and 401056 transitions. [2021-05-03 14:16:28,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:16:28,855 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 24 [2021-05-03 14:16:28,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:16:29,154 INFO L225 Difference]: With dead ends: 134051 [2021-05-03 14:16:29,155 INFO L226 Difference]: Without dead ends: 134033 [2021-05-03 14:16:29,155 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 252.9ms TimeCoverageRelationStatistics Valid=306, Invalid=686, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:16:29,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134033 states. [2021-05-03 14:16:31,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134033 to 131634. [2021-05-03 14:16:31,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131634 states, 131633 states have (on average 3.0084477296726506) internal successors, (396011), 131633 states have internal predecessors, (396011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:31,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131634 states to 131634 states and 396011 transitions. [2021-05-03 14:16:31,864 INFO L78 Accepts]: Start accepts. Automaton has 131634 states and 396011 transitions. Word has length 24 [2021-05-03 14:16:31,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:16:31,864 INFO L480 AbstractCegarLoop]: Abstraction has 131634 states and 396011 transitions. [2021-05-03 14:16:31,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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) [2021-05-03 14:16:31,864 INFO L276 IsEmpty]: Start isEmpty. Operand 131634 states and 396011 transitions. [2021-05-03 14:16:31,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:16:31,919 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:16:31,919 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:16:32,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10657,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:16:32,119 INFO L428 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:16:32,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:16:32,119 INFO L82 PathProgramCache]: Analyzing trace with hash 2002470900, now seen corresponding path program 361 times [2021-05-03 14:16:32,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:16:32,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517440104] [2021-05-03 14:16:32,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:16:32,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:16:32,227 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:32,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517440104] [2021-05-03 14:16:32,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913639027] [2021-05-03 14:16:32,227 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 [2021-05-03 14:16:32,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:16:32,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:16:32,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:16:32,304 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 51 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:16:32,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:16:32,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2021-05-03 14:16:32,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121675483] [2021-05-03 14:16:32,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:16:32,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:16:32,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:16:32,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:16:32,304 INFO L87 Difference]: Start difference. First operand 131634 states and 396011 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-05-03 14:16:32,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:16:32,990 INFO L93 Difference]: Finished difference Result 132986 states and 398783 transitions. [2021-05-03 14:16:32,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:16:32,991 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 24 [2021-05-03 14:16:32,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:16:33,867 INFO L225 Difference]: With dead ends: 132986 [2021-05-03 14:16:33,868 INFO L226 Difference]: Without dead ends: 132965 [2021-05-03 14:16:33,868 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 213.5ms TimeCoverageRelationStatistics Valid=306, Invalid=686, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:16:33,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132965 states. [2021-05-03 14:16:36,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132965 to 131642. [2021-05-03 14:16:36,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131642 states, 131641 states have (on average 3.0084016377876193) internal successors, (396029), 131641 states have internal predecessors, (396029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:36,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131642 states to 131642 states and 396029 transitions. [2021-05-03 14:16:36,547 INFO L78 Accepts]: Start accepts. Automaton has 131642 states and 396029 transitions. Word has length 24 [2021-05-03 14:16:36,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:16:36,548 INFO L480 AbstractCegarLoop]: Abstraction has 131642 states and 396029 transitions. [2021-05-03 14:16:36,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-05-03 14:16:36,548 INFO L276 IsEmpty]: Start isEmpty. Operand 131642 states and 396029 transitions. [2021-05-03 14:16:36,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:16:36,595 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:16:36,595 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:16:36,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10658,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:16:36,795 INFO L428 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:16:36,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:16:36,795 INFO L82 PathProgramCache]: Analyzing trace with hash -2033701072, now seen corresponding path program 362 times [2021-05-03 14:16:36,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:16:36,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526068574] [2021-05-03 14:16:36,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:16:36,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:16:36,916 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 57 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:36,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526068574] [2021-05-03 14:16:36,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310437059] [2021-05-03 14:16:36,917 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 [2021-05-03 14:16:36,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:16:36,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:16:36,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:16:36,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:16:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 58 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:16:36,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:16:36,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2021-05-03 14:16:36,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996913098] [2021-05-03 14:16:36,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:16:36,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:16:36,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:16:36,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:16:36,991 INFO L87 Difference]: Start difference. First operand 131642 states and 396029 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-05-03 14:16:37,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:16:37,679 INFO L93 Difference]: Finished difference Result 132827 states and 398454 transitions. [2021-05-03 14:16:37,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:16:37,680 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 24 [2021-05-03 14:16:37,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:16:37,992 INFO L225 Difference]: With dead ends: 132827 [2021-05-03 14:16:37,992 INFO L226 Difference]: Without dead ends: 132803 [2021-05-03 14:16:37,992 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 248.5ms TimeCoverageRelationStatistics Valid=308, Invalid=684, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:16:38,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132803 states. [2021-05-03 14:16:40,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132803 to 131642. [2021-05-03 14:16:40,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131642 states, 131641 states have (on average 3.0083560592824425) internal successors, (396023), 131641 states have internal predecessors, (396023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:41,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131642 states to 131642 states and 396023 transitions. [2021-05-03 14:16:41,064 INFO L78 Accepts]: Start accepts. Automaton has 131642 states and 396023 transitions. Word has length 24 [2021-05-03 14:16:41,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:16:41,064 INFO L480 AbstractCegarLoop]: Abstraction has 131642 states and 396023 transitions. [2021-05-03 14:16:41,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-05-03 14:16:41,065 INFO L276 IsEmpty]: Start isEmpty. Operand 131642 states and 396023 transitions. [2021-05-03 14:16:41,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:16:41,128 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:16:41,128 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:16:41,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10659 [2021-05-03 14:16:41,329 INFO L428 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:16:41,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:16:41,329 INFO L82 PathProgramCache]: Analyzing trace with hash 654521588, now seen corresponding path program 363 times [2021-05-03 14:16:41,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:16:41,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598863212] [2021-05-03 14:16:41,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:16:41,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:16:41,417 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 55 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:41,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598863212] [2021-05-03 14:16:41,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452834196] [2021-05-03 14:16:41,417 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 [2021-05-03 14:16:41,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:16:41,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:16:41,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:16:41,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:16:41,494 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:16:41,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:16:41,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:16:41,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623407582] [2021-05-03 14:16:41,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:16:41,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:16:41,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:16:41,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:16:41,494 INFO L87 Difference]: Start difference. First operand 131642 states and 396023 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) [2021-05-03 14:16:42,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:16:42,094 INFO L93 Difference]: Finished difference Result 132279 states and 397470 transitions. [2021-05-03 14:16:42,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:16:42,095 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 24 [2021-05-03 14:16:42,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:16:42,397 INFO L225 Difference]: With dead ends: 132279 [2021-05-03 14:16:42,397 INFO L226 Difference]: Without dead ends: 132279 [2021-05-03 14:16:42,397 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 116.5ms TimeCoverageRelationStatistics Valid=166, Invalid=254, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:16:42,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132279 states. [2021-05-03 14:16:45,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132279 to 131917. [2021-05-03 14:16:45,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131917 states, 131916 states have (on average 3.0087025076563876) internal successors, (396896), 131916 states have internal predecessors, (396896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:45,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131917 states to 131917 states and 396896 transitions. [2021-05-03 14:16:45,916 INFO L78 Accepts]: Start accepts. Automaton has 131917 states and 396896 transitions. Word has length 24 [2021-05-03 14:16:45,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:16:45,916 INFO L480 AbstractCegarLoop]: Abstraction has 131917 states and 396896 transitions. [2021-05-03 14:16:45,916 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) [2021-05-03 14:16:45,917 INFO L276 IsEmpty]: Start isEmpty. Operand 131917 states and 396896 transitions. [2021-05-03 14:16:45,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:16:45,970 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:16:45,970 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:16:46,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10660 [2021-05-03 14:16:46,170 INFO L428 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:16:46,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:16:46,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1163708020, now seen corresponding path program 364 times [2021-05-03 14:16:46,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:16:46,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058279324] [2021-05-03 14:16:46,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:16:46,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:16:46,280 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:46,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058279324] [2021-05-03 14:16:46,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539237584] [2021-05-03 14:16:46,281 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 [2021-05-03 14:16:46,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:16:46,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:16:46,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:16:46,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:16:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:16:46,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:16:46,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2021-05-03 14:16:46,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992052642] [2021-05-03 14:16:46,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:16:46,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:16:46,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:16:46,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:16:46,353 INFO L87 Difference]: Start difference. First operand 131917 states and 396896 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-05-03 14:16:46,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:16:46,968 INFO L93 Difference]: Finished difference Result 133111 states and 399324 transitions. [2021-05-03 14:16:46,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:16:46,969 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 24 [2021-05-03 14:16:46,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:16:47,277 INFO L225 Difference]: With dead ends: 133111 [2021-05-03 14:16:47,277 INFO L226 Difference]: Without dead ends: 133104 [2021-05-03 14:16:47,277 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 200.3ms TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:16:47,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133104 states. [2021-05-03 14:16:49,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133104 to 131917. [2021-05-03 14:16:49,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131917 states, 131916 states have (on average 3.00857363776949) internal successors, (396879), 131916 states have internal predecessors, (396879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:50,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131917 states to 131917 states and 396879 transitions. [2021-05-03 14:16:50,160 INFO L78 Accepts]: Start accepts. Automaton has 131917 states and 396879 transitions. Word has length 24 [2021-05-03 14:16:50,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:16:50,160 INFO L480 AbstractCegarLoop]: Abstraction has 131917 states and 396879 transitions. [2021-05-03 14:16:50,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-05-03 14:16:50,160 INFO L276 IsEmpty]: Start isEmpty. Operand 131917 states and 396879 transitions. [2021-05-03 14:16:50,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:16:50,657 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:16:50,657 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:16:50,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10661 [2021-05-03 14:16:50,857 INFO L428 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:16:50,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:16:50,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1834694950, now seen corresponding path program 365 times [2021-05-03 14:16:50,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:16:50,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465177487] [2021-05-03 14:16:50,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:16:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:16:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:50,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465177487] [2021-05-03 14:16:50,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548466239] [2021-05-03 14:16:50,967 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 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 [2021-05-03 14:16:50,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:16:50,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:16:50,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:16:50,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:16:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 51 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:16:51,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:16:51,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2021-05-03 14:16:51,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750598321] [2021-05-03 14:16:51,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:16:51,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:16:51,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:16:51,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:16:51,052 INFO L87 Difference]: Start difference. First operand 131917 states and 396879 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-05-03 14:16:51,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:16:51,736 INFO L93 Difference]: Finished difference Result 133934 states and 401039 transitions. [2021-05-03 14:16:51,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:16:51,737 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 24 [2021-05-03 14:16:51,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:16:52,087 INFO L225 Difference]: With dead ends: 133934 [2021-05-03 14:16:52,087 INFO L226 Difference]: Without dead ends: 133913 [2021-05-03 14:16:52,087 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 204.0ms TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:16:52,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133913 states. Received shutdown request... [2021-05-03 14:16:54,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10662 [2021-05-03 14:16:54,197 WARN L545 AbstractCegarLoop]: Verification canceled [2021-05-03 14:16:54,200 WARN L224 ceAbstractionStarter]: Timeout [2021-05-03 14:16:54,200 INFO L202 PluginConnector]: Adding new model unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 02:16:54 BasicIcfg [2021-05-03 14:16:54,200 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 14:16:54,201 INFO L168 Benchmark]: Toolchain (without parser) took 813674.03 ms. Allocated memory was 314.6 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 293.9 MB in the beginning and 11.4 GB in the end (delta: -11.1 GB). Peak memory consumption was 5.3 GB. Max. memory is 16.0 GB. [2021-05-03 14:16:54,201 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 314.6 MB. Free memory is still 295.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 14:16:54,201 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.16 ms. Allocated memory is still 314.6 MB. Free memory was 293.8 MB in the beginning and 292.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 14:16:54,201 INFO L168 Benchmark]: Boogie Preprocessor took 34.90 ms. Allocated memory is still 314.6 MB. Free memory was 292.3 MB in the beginning and 291.4 MB in the end (delta: 980.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 14:16:54,201 INFO L168 Benchmark]: RCFGBuilder took 539.44 ms. Allocated memory is still 314.6 MB. Free memory was 291.3 MB in the beginning and 276.8 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-05-03 14:16:54,201 INFO L168 Benchmark]: TraceAbstraction took 813042.25 ms. Allocated memory was 314.6 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 276.3 MB in the beginning and 11.4 GB in the end (delta: -11.2 GB). Peak memory consumption was 5.3 GB. Max. memory is 16.0 GB. [2021-05-03 14:16:54,201 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 0.13 ms. Allocated memory is still 314.6 MB. Free memory is still 295.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 32.16 ms. Allocated memory is still 314.6 MB. Free memory was 293.8 MB in the beginning and 292.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 34.90 ms. Allocated memory is still 314.6 MB. Free memory was 292.3 MB in the beginning and 291.4 MB in the end (delta: 980.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 539.44 ms. Allocated memory is still 314.6 MB. Free memory was 291.3 MB in the beginning and 276.8 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 813042.25 ms. Allocated memory was 314.6 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 276.3 MB in the beginning and 11.4 GB in the end (delta: -11.2 GB). Peak memory consumption was 5.3 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 55). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 812929.9ms, OverallIterations: 369, TraceHistogramMax: 12, EmptinessCheckTime: 9164.0ms, AutomataDifference: 198893.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 33.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6182 SDtfs, 29508 SDslu, 36522 SDs, 0 SdLazy, 50499 SolverSat, 10193 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 25333.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15938 GetRequests, 7313 SyntacticMatches, 169 SemanticMatches, 8456 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53767 ImplicationChecksByTransitivity, 62155.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=131917occurred in iteration=367, InterpolantAutomatonStates: 7401, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 420037.6ms AutomataMinimizationTime, 369 MinimizatonAttempts, 575396 StatesRemovedByMinimization, 363 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1159.9ms SsaConstructionTime, 5025.5ms SatisfiabilityAnalysisTime, 94666.9ms InterpolantComputationTime, 15269 NumberOfCodeBlocks, 15268 NumberOfCodeBlocksAsserted, 1666 NumberOfCheckSat, 14534 ConstructedInterpolants, 0 QuantifiedInterpolants, 63986 SizeOfPredicates, 201 NumberOfNonLiveVariables, 31141 ConjunctsInSsa, 5172 ConjunctsInUnsatCore, 735 InterpolantComputations, 3 PerfectInterpolantSequences, 15124/38650 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